Tag Archives: Jim (N8KUE)

2015/09/08 (T) Polyurethane

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I was awakened at 6:30 AM by heavy rain.  I was not sleeping comfortably and had to get up anyway, so I put on my lightweight robe and slippers and took my iPad to the living room.  Naturally the cats wanted to be fed so I took care of that and then settled in to put the finishing touches on yesterday’s blog post.  The rain lasted for about 20 minutes.  I e-mailed the post to myself at 7:15.  Linda got up at 7:30 AM so I made coffee but we deferred breakfast until later.

I was thinking about the house battery voltage issues Butch was having and the role of the Vanner battery equalizer in his (and our) house battery system.  I did another Google search on “battery equalizer …”, and selected “batter equalizer circuit” from the list.  One of the listings was for the original patent application by James D. Sullivan as assigned to Vanner, Inc. ( http://www.google.com/patents/US4479083 ).  (I found it interesting that Google has a special directory for patents.)  As I expected, it is a DC-to-DC converter and in its most common configuration it is designed to take charge from the upper portion of a series battery pack and supply it to the lower part of such a pack or to any loads connected across just the lower bank.

One of its features is that it looks at the voltage across the entire battery pack and uses a voltage divider network (two resistors in series) to generate a reference voltage that is compared to the voltage across the lower bank.  Differences as small as 0.01 volts result in the transfer of charge from the upper to the lower bank when the lower bank has the lower voltage.  As implemented for use with buses and other vehicles that have 24/12 dual voltage DC electrical systems the divider network consists of two equal resistors and the reference voltage is 1/2 the overall battery pack voltage.  The design can “balance” other configurations, in which the “upper” and “lower” banks do not have the same voltage, by changing the divider resistors to have the correct ratio.  I will call Butch again this evening to report what I found and see how things stand with them in general.

When we had consumed a sufficient amount of coffee to be alert enough to work intelligently and safely we went to the garage to finish assembling the left plenum/support box for the built-in sofa.  I forced mating pieces into alignment while Linda drove in the screws.  These parts dry fit perfectly so this should not have been a problem.  I blame the slight misalignment on the corner clamps that I used.  I was reminded, once again, that cheap tools are almost never a bargain.

We had breakfast at 8:30 AM; homemade granola with leftover mixed berries.  We also spilt a banana that was getting past ripe.  As we were finishing our meal I got a call from Steven Weber at Martin Spring with another question on the Webasto system in the Prevost Bus Conversion he is servicing.  He had isolated a cracked fuel pipe and needed to order a replacement.  I suggested Sure Marine Service but also mentioned Lloyd DeGerald and Darin Hathaway.

Linda needed to spend some time at her desk preparing for a 1 PM meeting with the I.T. department at the University of Michigan Ann Arbor so I took a shower and got dressed to work.  I gathered up the laundry, started a load, and then spent some time in the garage sanding pieces of the built-in sofa while Linda showered and got dressed for her meeting.  She planned to leave at 11:45 AM.  I left at 11:30 and went to Lowe’s to buy tack cloth.

Tack cloth is like sticky cheesecloth and is probably called that because it is “tacky” to the touch.  It is used to remove sawdust, drywall dust, and other little tiny particles from surfaces such as sanded wood just prior to the application of finishes.  While I was there I looked at inline water separators and inline oilers for use with air compressors supplying air to pneumatic tools.  I also looked at copper fittings to see if they had 90 degree elbows that I could use to modify the Aqua-Hot coolant lines that feed the two front fan-coil hear-exchangers.

Linda left before I got home.  I moved the laundry to the dryer and went back to the garage to work.  I was contemplating what I wanted to do next when Keith pulled up in his truck and trailer.  I chose to skip having the lawn mowed this week which will help Keith get the rest of his clients taken care of in his shortened 4-day workweek.  The grass has grown since last Monday but not that much and is still short and brown in places.  With rain in the forecast today, tomorrow, and Thursday giving it another week should be good for it.  I showed him the floor in the bus before he left.

I returned to the bus project and realized that I needed to stain the underside of the built-in sofa shelf as part of it might be visible through the notch in the vertical front panel at the floor.  As long as I was staining that I also stained the tops of the plenum/support boxes so they would blend with the two stationary pieces at either end of the seat.

With the staining done I came inside to make a few phone calls.  The first one was to Josh Leach at Coach Supply Direct to check on the details of the Corian countertop for the custom desk.  Josh said the Corian normally comes bonded to plywood which protects it from cracking in shipment.  I want to go ahead and cut the 3/4″ plywood top that will join the two pedestals together.  I also wanted to know if his Corian vendor could come out on the afternoon of the 14th to measure and possibly install the countertop by the end of the week.  His vendor turns out to be an Amish craftsman who does not “come out and measure” or “come back and install.”  Josh said he would check with the vendor to see if he would use my plywood base and also see if he had the Sandstone product in stock.

My next call was to Pat Lintner to check on dinner plans for the upcoming GLCC Surplus and Salvage rally.  I need to coordinate with Crimp Supply to have them provide catalogs for the attendees and perhaps speak to the group before dinner.  I got his answering machine and left a message.

My third call was to Jim Miteff (N8KUE) returning his call/message from earlier.  We had a long chat about RVing and Prevost bus conversions.  It’s a big topic and I sometimes forget that I have spent the last 10 years learning about it.  When I think back to the beginning of this adventure, however, I recall how exciting yet overwhelming it was initially.  I see Jim in the same place, but he is a very quick study and professional researcher so he will get past the overwhelming part fairly quickly.

While I was talking to Jim I heard a loud bang and then another one.  They sounded like it had come from within the house.  After the second one I got up to investigate.  As I peeked out the front door a Consumer’s Energy truck was backing out of the driveway.  I flagged the driver down and asked what was up.  He said they had detected a leak and that he had just fixed it.  I presumed it was at our meter but he wasn’t any more specific than that.  I thought it was odd that he did not knock on the door first to let me know he was on site, but I guess they have the right to service their infrastructure.  I have smelled gas on that side of the house occasionally ever since they installed it but dismissed it as a “purge valve” doing its thing.  We had the same issue at the old house and they kept telling me it was a “vent” mechanism on the meter.  I never belief that, but whatever.

I wrapped up my call with Jim, put in another load of laundry, and returned to the garage to apply polyurethane to as much of the built-in sofa pieces as I could.  Each piece has to be done in two steps and requires two coats, so that’s four applications that will have to spread out over a couple of days.

There wasn’t much else I could do, and I did not feel like working at my desk, so I hung up the dry laundry and then worked on my iPad in the living room.  Linda had made an appointment with Renee to have her hair cut at 4:30 PM.  She stopped at Meijer’s on the way home and finally arrived at 5:45 PM.  I went back to the garage at 6 PM and applied another coat of polyurethane.

Linda bought an Amy’s Roasted Vegetable pizza for dinner and made a nice salad to go with it.  I had some more of the Leelanau Cellars Apricot wine and we had the last two vegan cupcakes for dessert.  I tried calling Butch twice but his phone was either off or out of range.  I called Pat Lintner again and this time he was home.  Saturday dinner will be at a restaurant so that will not be a good time for Crimp Supply to talk to the rally attendees and pass out catalogs.  I will call them tomorrow and see what I can arrange.

I headed back to the garage yet again, applied polyurethane to all the surfaces that had not yet been coated, put the brush in the soapy water, sealed up the can, and closed up the garage.  I think I have just enough polyurethane left to put one more coat on the top surface of the shelf.  I plan to do that in the morning before I start anything else.

On the drive home Linda heard a weather forecast that thunderstorms were headed our way this evening with up to 1″ of rain, strong wind, and possibly small hail.  Linda headed off to bed at 8 PM to watch NCIS and I caught the last half of the show.  I turned the channel to Create on Detroit PBS and watched A Chef’s Life, a series about a wife and husband who run the Chef & The Farmer restaurant in eastern North Carolina, and then turned the TV off.

I checked the weather with my iPad and it appeared that system had fallen apart although there was still a reduced chance of scattered thunderstorms at 11 PM and again from 2 to 4 AM.  I turned the light out at 10:30 PM.

 

2015/08/27 (R) In and Out

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Linda was up at 5:45 AM and on her way to the bakery at 6:15.   I got up an hour later and also got an early start to my day; early is relative, after all.  After a bowl of granola I brewed some Cafe Europe / Columbian decaf coffee, turned on the gas fireplace, and continued reading Number Theory and its History.  A week ago Jim (N8KUE) e-mailed some questions to us regarding RVing and bus conversions.  I felt that too much time had passed without a response so I settled in at my computer to answer his questions as best I could.  I sent my reply at 9:30 and turned my attention to our bus project.

I got the pull-out pantry (mostly) installed yesterday.  Before we could place the refrigerator in the alcove, however, I needed to do four things:

  1. Install a piece of aluminum angle to prevent the fridge from sliding to the left;
  2. Secure the water line that went to the old refrigerator;
  3. Plug up openings in the cabinet with steel wool; and
  4. Install the 10th drawer slide on top of the pantry to reduce lateral movement at full extension.

I decided to tackle these tasks in that order, which meant a trip to Lowe’s to get the aluminum angle.  I chatted briefly with Mike (W8XH) on the drive and stopped at The Home Depot first but did not find what I wanted.  Lowe’s had a 3 foot length of 1/8″ thick 1.5″X1.5″ angle.  I wanted aluminum because it is light, easy for me to work, and won’t rust or need to be painted, but I wanted the 1/8″ thickness for strength.  While I was there I picked up another foam brush, a bottle of Mineral Spirits, and a package of #8-1.75″ stainless steel self-drilling exterior wood screws.

The road graders were out today in our part of the county and I passed the one working on Golf Club Road going to, and returning from, Lowe’s.  There was also one working on our road that I could not get around, so I followed it slowly until it reached our driveway and I could turn in.

Back home I cut the aluminum angle to a length of 26.5 inches, the same as the depth of the refrigerator base section and the top piece of plywood in the base of the alcove. I selected a drill bit that was just barely larger in diameter than the stainless steel screws.  Starting with the midpoint I drilled holes every three inches along the centerline of one side of the angle.  I then countersunk each hole, checking with a screw until the head was just slightly recessed.  A light back bore with the countersink bit removed any rough edges.

With the pantry pulled all the way out I placed the side of the angle with the holes on the 2nd piece of plywood in the alcove base with the other side of the angle against the edge of the 3rd piece of the base.  Since these pieces of plywood are all 3/4″ thick the vertical side of the angle extended above the plywood by 3/4 of an inch, more than enough to catch the left side of the refrigerator.  I held the angle tight against the edge of the 3rd piece of plywood, with the front edge back about 1/2″, and used the #8 VIX self-centering drill bit to drill a pilot hole in the back hole.  I then secured it with one of the stainless steel screws, penetrating both the 2nd and 1st layers of plywood and probably a heavy 1/8″ of the subfloor.  I held the front of the angle tight and secured the 2nd hole from the front in the same way, as I could not access the first hole due to the pantry.  I drilled all the remaining holes except the first and put in the screws.  I then pushed the pantry all the way in so I could access the front hole and secured it.  The angle was now held in place by nine strong screws fastened into a lot of wood.

The pantry and refrigerator installed in the alcove.

The pantry and refrigerator installed in the alcove.

The old refrigerator had an ice maker and cold water dispenser in the freezer door so there is a flexible copper water line at the back of the alcove.  The line runs through an inaccessible area and into the cabinet under the kitchen sink so removing it would be difficult and impractical.  It was easier to secure the water line, and besides, we might want to use it again someday.  I found some used screws with broad #2 SR heads and used them to secure cable ties with mounting tabs to the back wall of the alcove.  I re-shaped the copper tube as best I could so it would lie relatively flat against the back of the alcove and used the cable ties to hold it in place.

I noticed when I moved the tube that a little water came out of the end.  That struck me as odd as I had it in my head that the line was out of service.  After a little investigation I remembered that the shutoff valve for this line was still attached to the water inlet tube on the back of the old refrigerator.  If we had pressurized the fresh water system this would have been an open line.  Yikes!

I now had another, unexpected, task that had to be done before I could do anything else.  I gathered up a few tools, parts, and materials, got my head and arms into the under sink cabinet (which is never comfortable), shut off the supply line valves (just to be safe), and disconnected the copper tube to the refrigerator alcove.  I wrapped the threads of the open end of the T-fitting with several turns of Teflon tape, threaded a cap into the fitting, and snugged it up tight.  I did not, however, pressure test it as I did not want to take the time and I did not want to pressurize the fresh water system with the toilet disconnected.

With the water line secured I got one of the old packages of steel wool and used it to stuff the openings in the lower rear corners of the alcove where lots of wires, the water line, and two air lines pass in and out.  I meant to use the #1 steel wool but grabbed the 4/0 by mistake.  It will work just as well but the 4/0 is what Linda is using to clean all of the walnut woodwork, so it was a bit of a waste.

The pull-out pantry is very stable vertically and horizontally except when it is all the way out where it can move side-to-side about 1/2″.  I decided to install the last of the 10 slides on the flat between the top of the pantry box and the ceiling of the alcove, which is also the base of the upper cabinet.  The ceiling of the alcove is not parallel to the floor and so it was not parallel to the top of the pantry box.  I was able to slide a piece of 3/4″ oak veneered plywood between the ceiling and the upper edge of the top slide. With the 10th slide on top of the pantry I had about a 1/8″ gap between the slide and the plywood at the front, opening to about a 1/4″ gap at the rear.

My first attempt at a solution was to try cutting blocks from the end of a 2×4 to be just the right thickness for the front, middle, and rear.  That quickly proved to not be a workable solution without some form of stationary saw.  After further pondering I decided to cut a 4.5″ wide piece of the oak veneered plywood from one of the leftover pieces that happened to be 26.5″ long.

The new refrigerator in the alcove with the doors open.

The new refrigerator in the alcove with the doors open.

I set the piece of plywood in place on top of the two slides, one mounted to the alcove side panel and the other resting on top of the pantry box, and shimmed it with wood shims between the plywood and the ceiling to remove the gap between the plywood and the slide without making it tight.  I pulled the pantry out slightly so I could drill and screw the rear hole of the stationary part of the slide.  I then pulled the pantry all the way out, pushed the center section of the slide part way back in, and secured the front hole of the moveable part of the slide to the top of the pantry.  I used a slot that allowed side-to-side adjustment, just in case.  I also secured the center slot on the moveable slide to the top of the pantry box.

I fiddled with the slide until it went in and out smoothly.  It is tight enough that I don’t think it will come open when driving, but it pulls out easily enough and will be easier once we get a handle on it.  Linda called at 4 PM as I was finishing this task to let me know she was on her way home from the bakery.  It would be 60 to 90 minutes before she got home so I moved on to the next task.

The first piece of underlayment to go in will be a full 4’x8′ sheet minus a notch for the middle air-conditioner drain line and part of one short side that has to fit around the built-in pantry.  I measured for those cuts and then laid the sheet out in the driveway on top of 2x4s (on the flat).  I tried plunge cutting most of the 21″ long by 1″ wide strip off the end with my circular saw without using a guide and finished the cut with my saber saw.  My plunge cut wasn’t very good so I trimmed it with the saber saw.  That edge will go under the mirror tiles against the back of the built-in pantry so it will be OK.

Linda got home around 5:30 PM.  After unloading her car and changing clothes she examined my work for the day and was pleased with the way the pull-out pantry worked.  She helped me carry the 4’x8′ sheet of underlayment into the bus at which point I decided that we needed to get the refrigerator into the alcove before doing anything else.

We set the underlayment aside and uncovered the fridge which we had previously wrapped in painter’s plastic to keep it clean while grinding and sanding.  Linda cleaned off packing tape adhesive with Goo Gone, wiped it off with a wet rag, and then I wiped it off with a dry towel.  We rolled it over to the alcove, shut off the circuit breaker, plugged it in, and secured the cord to the back.  It rolls very easily but to get it into the alcove we had to tilt it forward to get the bottom back edge of the unit onto the 2.25″ high plywood base.  Oops; the left edge of the fridge space overlapped the built-in pantry opposite and prevented the unit from tilting enough to get the back edge up high enough.

The pantry pulled out with the refrigerator installed.

The pantry pulled out with the refrigerator installed.

We have learned not to panic, and after a moment’s thought we turned it slightly to the right, got the right rear bottom corner up onto the plywood and slid it into the alcove a couple inches.  We were then able to turn it to the left and get the left rear bottom corner onto the plywood base, making sure it was inside the aluminum angle.  Fortunately we had enough clearance above the unit to do that.  (If not we would have used the leftover 3/4″ plywood in front of the alcove, gotten the fridge onto those pieces, and then rolled it straight into its space.).   We lifted the front bottom of the unit and rolled it back into its cubby.  It was a perfect fit; snug to the aluminum angle on the left, tight to the right side of the alcove at the rear with a small (3/16″) gap at the right front, and far enough into the alcove that we can open the three drawers to the left of the sink.  High five!  Good job team.

I turned on the breaker to make sure the refrigerator still worked.  It did, and we were both pleased with how much quieter it is than the old one.  We did not need it running at the moment, however, so I turned the breaker off.  Linda got a towel and propped the doors open.

We got the underlayment flat on the floor and slid it into position.  It needed to be trimmed in three spots and I did not want to get into that at this hour so Linda started preparing diner while I put tools and materials away, locked the bus, and closed up the garage/shop.  I plugged in the old refrigerator (in the garage) to let it cool down overnight as DTE Energy’s recycling program is picking it up tomorrow between 8 AM and noon.

Dinner was mock riblets in BBQ sauce, green beans with onions and carrots, and fresh peaches, all very tasty.  After dinner I worked at my desk.  I replied to several e-mails from Gary at Bus Conversion Magazine, and looked at my Habitat For Humanity article to see if I could split it into two or three parts.  It looked like that was possible so I let Gary know.  I chatted briefly with Steve (N8AR) on the Novi 440 repeater and with Jim (N8KUE) on the South Lyon 2m repeater.  I processed three photos of the finished pantry/fridge installation showing that everything goes in and out and e-mailed it to a dozen people.

I came to bed just before 10 PM.  We watched TV for a while until Linda drifted off to sleep.  I stayed up a bit longer to finish this post.

 

2015/08/09 (N) Sounds of Silence

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Sunday usually means a trip to the Howell Farmers Market if the weather is nice.  The weather was OK but Linda did some major grocery shopping last night and did not need anything from the market so we did not go.  We were both tired from yesterday’s refrigerator swap, physically and emotionally, and wanted to take it easy today.  I brewed a pot of Ethiopian Yirgacheffe half-caff coffee and we enjoyed that while reading in the living room.  We eventually ate breakfast and then got ready for the rest of our day.  For me that meant doing three loads of laundry.

I put the first load of laundry in the washer and then drove to The Home Depot to get two more drawer pulls.  We also wanted to look at wall paper but they do not stock any.  Lowe’s had a very limited selection of wallpapers, but we thought a couple of them might work if we could not find anything else.  One, in particular, was scrubable and another was paintable.  We also found one that we liked in a book of Allen-Roth samples.  This was not something we needed to decide on the spot but it is something we need to get settled sooner rather than later.

When we got home we pulled the new refrigerator out of its alcove and plugged it in.  I set the freezer and fresh food compartment controls to the “normal” mark.  Linda filled containers with water and placed them in both compartments.  I found the remote thermometer for the unit that is still mounted on the wall next to the alcove and set it in the fresh food compartment.  The two thermometers are off by a couple of degrees in opposite directions, but close enough for what I needed to do as it will allow me to monitor the temperature without opening the door.  The new refrigerator was much quieter than the old one, which was one of the improvements we were looking for in a new unit.

New fridge in alcove. Kitchen drawers removed. Floor being prepped.

New fridge in alcove. Kitchen drawers removed. Floor being prepped.

When we got home we had a phone message from Jim, N8KUE, regarding motorhomes.  Jim plans to retire from the Ford Research Labs in March.  He and Pam are seriously considering getting a motorhome and are starting to research the market.  We’ve said for a while that we would be glad to meet for coffee and talk motorhomes, bus conversions, and the RV lifestyle.  I called Jim back, suggested that we meet them at the Biggby’s Coffee in South Lyon at 4:30 PM, and they agreed.

Linda tried to pull up the Arcadia Bus Rally website to get the registration form but the domain name appeared to be for sale.  I e-mailed Brenda Phelan to find out what is going on.  She and her husband, Bill, operate the rally.  I then worked on the drawings for the built-in sofa cushions.

We had an early dinner at 3:30 PM and left for South Lyon at 4 PM and got to Biggby’s Coffee just after 4:30 PM.  Jim, Pam, and their son Adam, were already there.  We talked until after 6:30 PM and then drove the short distance to the Witch’s Hat Depot in the South Lyon Historic Village where our South Lyon Area Amateur Radio Club (SLAARC) holds its monthly business meeting and program.  One of the members, John (NU8M), a materials science engineer who works for Bosch, gave a very interesting presentation on the various processes that affect electronics as they age and can ultimately cause them to fail.  It was a pleasant evening, weather-wise, and some of us lingered in conversation for a while after the meeting before heading home.

We arrived home hungry and had some hummus with sourdough pretzel nibblers and pita chips and a small piece of watermelon.  I checked the bus refrigerator and the fresh food compartment was down to 34.4 degrees F indicated.  The remote thermometer is off by about 2 degrees F but I don’t recall in which direction.  I turned the thermostat to a warmer setting and will check it again tomorrow.  We turned in for the night and Linda read while I wrote for a while before turning off the lights.

 

2015/07/29 (W) Drive Shaft

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I had had a 9:30 AM appointment at Brighton Honda to have a drive shaft replaced and suggested that we just continue on to the Brighton Panera a half mile down the road for bagels and coffee.  Linda never refuses to go to Panera so that is what we did.  The Wi-Fi was out of service but we both bought things to read so we did not care.  We sat in the two comfy armchairs by the fireplace, which was turned on, because the temperature inside was very cool, a frequent problem with this particular Panera store.  We each had a bagel and many refills of our coffee cups and stayed long enough that Brighton Honda called to let me know my car was ready to be picked up.  We left at 12:30 PM and Linda dropped me off to retrieve the ca.

Back home we had the leftover couscous with caramelized onions and the rest of the kiwis for lunch.  Linda finalized her grocery list and headed off in search of food.  I spent the rest of the day and most of the evening working on the design/drawings for the built-in sofa.

Through the course of the day I had QSOs with Jim (N8KUE) on the Novi 440 repeater and with Chris (K8VJ), Steve (N8AR), and Mike (W8XH) on the South Lyon 2m repeater. I also installed an updated driver for the NVIDIA GPU in my ASUS laptop, installed updates on the older Sony VAIO workstation (which still has Windows XP Pro), installed updates on the Linux box, and took time out for dinner (a delicious red lentil potato curry) and dessert (very sweet watermelon).

I went back to work in my office and sent an e-mail to Mike (W8XH) concerning Windows 10.  He replied via the South Lyon 2m repeater.  We had a long chat from 10:10 PM to just after 11 PM that was joined briefly by Steve (N8AR).  There was also a group QSO taking place on the Novi 440 repeater that I listened to in the background.  After I turned the radio off and came upstairs Linda said it appeared that my ham radio transmissions were interfering with our OTA TV signals.  The antennas are on the same tower but the OTA TV antenna is mounted below the Diamond X-50N 2m/70cm vertical ham antenna so I was a little surprised that it would be causing interference.  The vertical antenna has an omnidirectional radiation pattern which resembles a donut sitting on a horizontal surface, so the location directly under the base of the antenna should be a region with very little signal.  Apparently that is not the case and I will eventually have to do something to remedy the situation.  For now, however, the solution will be to not use the radio when someone s watching television.

 

2015/06/29 (M) Website On The Air

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Linda was up at 5:55 AM this morning and left for the bakery at 6:15.  Experience has shown that this is usually early enough to get ahead of the morning rush hour traffic inbound to the Detroit metro area from the northwest.

I got up about an hour later, had granola for breakfast, and enjoyed my morning coffee (Sweet Seattle Dreams half-caff blend from Teeko’s) and then made a run to Lowe’s to purchase a couple of copper ground lugs and 5 feet of #10 green ground wire.  Back home I tried to use one of the ground lugs to terminate the ground wire from the cable entry box (CEB) to the 36″ ground bar on the wall behind the ham radio desks but it’s shape prevented the wing nut from going onto the stud.

I planned to use the other lug to attach one end of the #10 wire to the ground bar and put a male spade lug on the other end to mate with the connector on the Go Box ground pigtail, but that clearly was not going to work.  I dressed the ground wire and (temporary) coax in the ham shack and put the ceiling tile back in place.  I then started cleaning up the living room and small bedroom per Linda’s request before she left this morning.  Some of our (my) projects have a way of expanding throughout the whole house.  I had hoped to also pick up the coax cables spread out in the recreation room, and at least start to straighten up the ham shack/office, putting materials away and moving tools to the garage.

At 10 AM I made a few phone calls.  The first was to Rick Short at ISRI USA regarding the 6860 bus driver’s seat and a possible visit tomorrow morning.  I got his voice mail (again) and never got a return call (again) so I gave up on getting any assistance from him or from ISRI USA.  I called Linda to make sure she did not have any commitments on Wednesday and then called Josh at Coach Supply Direct to set up a visit to his shop for Wednesday late morning.  Linda and I plan to finalize our Flexsteel furniture order and give Josh the deposit during that visit.  Next I called Scott Adams, AC8IL, at Adams Electronics and ordered a 20 foot length of LMR-400 with an N-male connector on one end and a PL-259 connector on the other end.  Scotty and I also chatted briefly about tower bases.

I e-mailed Scott Neader at QST.com regarding the transfer of the SLAARC domain name and website from GoDaddy to QST.com and got a reply back right away with an outline of the steps I needed to follow.  First on the list was creating an account for our ham radio club through his billing system.  I took care of that and e-mailed him back.

Keith Kish, from Kish Lawn, care showed up around 11 AM to cut the grass.  When he was done I headed back to Lowe’s to look for an alternate ground clamp and pulley support for the tower but did not find anything suitable.  So as not to have it be a wasted trip I bought three more bags of broken brick pieces to use around the tower base and cable entry box.

I spent some time looking at the Yaesu FTM-400DR/DE on several different ham radio equipment vendor websites.  Yaesu is offering a $100 rebate on this 2m/440 mobile radio through tomorrow.  All of the distributors are selling it for the same price, $599.95 and the rebate brings it down to $499.95, so if I buy one it will come down to who has them in stock and is offering free shipping.

Linda got home from the bakery around 3 PM, earlier than I expected and nice for her.  She went for a walk while I continued to fuss with ham radio and website stuff.

For dinner Linda made a white beans and mustard greens dish.  We eat a lot of lettuce, kale, and spinach, both raw and cooked into dishes, but only occasionally have collard greens or mustard greens.  Mustard greens have a very strong, bitter flavor and I liked them more than Linda did.  I think they are an acquired taste and may be more suitable as an accent ingredient rather than a main one.

After dinner I checked my e-mail and had a reply from Scott at QTH.com.  The QTH SLAARC account invoice was ready so I paid it using a personal credit card.  I then moved the coax from our Icom IC-7000 to Mike’s Icom IC-2820H and turned it on.  Mike was on the South Lyon repeater discussing the Field Day event with Steve (N8AR) and Bruce (W8RA).  Paul (N8BHT) was able to join the conversation but I was not successful breaking in so I just listened.  It was an indication that my power into the repeater was probably still marginal but a good reminder that ham radio conversations are very public.

When they were done I called for Mike and he came back.  We had a good QSO (chat) about the Yaesu FTM-400.  Jim (N8KUE) joined in for a while.  After Jim dropped off we tested my ability to transmit to, and receive from, both the South Lyon 2m and Novi 70cm repeaters.  The added power of the IC-2820H over my IC-7000 (50W vs 35W in the 70cm band) combined with the lower signal loss of the better coax made just enough difference that I could hold the Novi repeater when transmitting although my signal was still on top of a lot of noise coming back out of the repeater.

Linda wanted to watch an episode of Scorpion, followed by NCIS Los Angeles, after which I caught an episode of Two and a Half Men and then turned off the TV.  I will have to make a decision about the Yaesu FTM-400 in the morning.

 

2014/08/23 (S) Square Waves

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We have so much to do at home and on the bus that we might have skipped the SLAARC (ham radio club) breakfast in South Lyon this morning, but I had agreed to meet Chuck at his shop (bus garage) at 10 AM in Novi and to bring Mike (W8XH) along with his oscilloscope to look at the tachometer signal, or lack thereof.  We had a nice chat with our ham radio friends, discussed having dinner in a week or so with Bruce and Linda, and then headed to Chuck’s shop.

We had two different opinions as to what signal we might find, if any, at the end of the wires that connect to Chuck’s tachometer.  Matt, from Bob’s Speedometer, told me that the signal to both the VDO tachometer and speedometer were variable frequency square waves at 3 to 5 volts peak and that the electronics in the gauge moved the needle in proportion to the frequency.  Mike (W8XH) had talked to Jim (N8KUE), who works in the research lab at Ford Motor Company, and Jim was of the opinion that the input to these gauges was a pulse width modulated signal.  With pulse-width modulation the frequency and amplitude of the waveform are constant but the width of the “pulse” (the “on time” of non-zero voltage) varies from zero to some maximum percentage of the half cycle, up to 100%.  If it is on for the entire half cycle it becomes a square wave.  The longer the pulse (on time percentage) the more energy is transmitted.  The gauge electronics can convert that to a needle position or run a motor faster or slower, such as might drive an odometer.

So which was it?  Well…neither.  What we saw was an alternating current signal that appeared to simply be an impulse (sudden spike in the voltage), one positive and one negative per cycle, with the frequency responding in direct proportion to the engine RPM.  The impulse had a rapid but noticeable decay time that appeared to me to exponential, but we did not have the wires connected to a load and that may have affected the signal. The voltage we were seeing appeared to be in 300 mV range, a far cry from the 3 – 5 volts we expected.

We loaded the cardboard in my car before going to breakfast, so when we were done at Chuck’s we headed directly to Recycle Livingston.  From there we went to pet Supplies Plus for some cat litter and then to Lowe’s for four more sheets of drywall (Sheetrock) and a large tub of better drywall compound.  After fighting with the back wall of the garage recently and having trouble with using the patching and repair compound yesterday, I wanted a drywall compound that would go on easier and smoother.  It could just be my technique, of course; I wasn’t that good at dry-walling 32 years ago, and feel like I have lost what little technique I once had.

Back home we unloaded everything, changed into our work clothes, and had lunch; grilled “cheese” sandwiches with tomatoes and dark leafy greens and fresh peaches, ripened to perfection.

While Linda sanded the drywall compound I applied yesterday I removed the panel from the library side of the opening for the old window A-C unit.  I insulated the cavity, cut and installed a new piece of drywall, and re-taped the seams.  I helped Linda finish the sanding, wiped off the dust with a wrung out sponge, and then applied another coat of drywall compound.  I then applied a first cost of “mud,” as drywall compound is commonly called, to the filler panel in the library.

In preparation for dry-walling the new utility closet we had to do some carpentry to box around the flue and gas pipe where they pass through the west wall.  We also had to box around the supply air duct where it passes above the utility closet door.  Finally, we added some backer boards along the edge of the platform by the west wall.  The purpose of all of this carpentry was to provide backing along all drywall edges so it will be supported and can be secured.  Our final task for the day was to trim a piece of 2×4 to block off the top of the wall cavity where the return air duct is connected next to the door between the library and the garage.

For dinner we had leftovers from Thursday:  Koshary and pita bread with vegan garlic “butter.”  Linda read somewhere recently that drier white wines are generally considered (by someone) to go better with Middle Eastern food, but we thought our 2009 Egri Merlot went quite well with dinner.  Of course, Koshary is an Egyptian dish, and so perhaps more Mediterranean than Middle Eastern.  All of that reminded me that there really are no rules about these things; drink what you like and enjoy life.