We Hit 'Em.......Now What Happens?

 Breaking story from Newsmax.....

ACCCCK! A Hunnert Degrees Today!

 And more to come tomorrow. Supposed to drop back into the 80's on Sunday, but we'll see.

But hey....It's a DRY heat! Humidity was only NINE per cent today! 

 

Enjoy you weekend, keep that head swivellin', and exercise your 2A rights! 

An Oldie, But A Goodie!

Nice Shot.....

 Wonder what they used? 

 

A Hellfire, maybe?

 

I Think I'll Stay Close To Home This Weekend.....

 Don't go stupid places, don't hang out with stupid people, and don't do stupid things!

Not *expecting* anything to go sideways, but we're prepared if it does.

Pray for America, and keep your head on a swivel! 

L.A. Insurrection.....Follow The Money....

 Interesting article from Not The Bee.....

Busy, Busy, Busy....With Rain!

Well, last week it was nice........

 50* and raining, with more on the way. Total rain for May was 2.97", and my Taylor rain gauge, and the digital gauge in the Davis weather station are in agreement. And we're at 1" of rain for the last week.

SLW went down to DIA to pick-up her two best friends, and only came home with one.........her other friend had missed the flight by minutes, but she was able to get another in two hours. She took the shuttle up here because she didn't want SLW or I to make another round trip. One of the two was her Maid-of-Honor at our wedding, and the other is the Pastor that married us. It's turning into an "interesting" trip for The Three Amigos! 

 If SLW's third bestie were also here.....I'd start to look for suitable shelter.......

Come to think of it....these three all together here may have been what triggered that M8.2 solar flare....hmmmmm.  Info about the resulting CME, which was aimed smack at our face, can be found here.

Sprayed the back yard with Weed-B-Gon and nuked the gravel borders with RoundUp. Was going to do more, but I had other things to do, and now we've got some thunder-boomers rolling through.

Geesh......I really have to post more often, just to keep you all 'in the loop'. 

During these cool rainy days when I can't paint or clean parts, I duck back down into The Lab, and tinker away. The Fisher is under the microscope again, as I track down a stray voltage that's flummoxing things up. I'm getting a handle on it, but after this unit is finished I doubt if I'll be taking on any more "For Hire" jobs. It's just too much distraction. I should have been finished with my TEAC A-7030 Reel-to-Reel deck, and it's still just sitting there.

And yes, the Supra is in the Hangar Deck being worked on. I've done a lot of work on it, and spent some time reorganizing SLW's side of the garage. I'm going to move the Supra about 3' to the center of the garage for easier access to the interior, and extra room for "whoever" comes out to pull the windshield. I have to remove the plastic defroster vents to get at the screws that secure the top dash pad to the firewall so I can pull the pad out. This is required to remove the failed heater core, a "Work In Progress". Annnd I've damaged the pad getting one of the defrost vents out, hence the "Pull The Windshield!" command being given. So while I'm working out the logistics on that, I'm keeping busy cleaning up all the surface rust in the left side of the engine bay. I pulled both headlight assemblies out, along with the motors and connecting links. The links just needed a good cleaning, but the headlight "buckets" need to be sandblasted along with the suspension mounts. I've been holding out on going to the sandblaster as it's been rainy the last two weeks, with very high (for here...) humidity, and I don't want to the Naked Steel to rust on the way home.

Right side headlight mounting position. The big black spot is from when I painted the bumper. Guess I didn't mask things as well as I thought.

 The left side has cleaned up a bunch, but the entire left front corner will get resprayed and "faded in".

 

This is the headlight bucket from the left side.

This headlight always seemed to raise and lower slower than the other one. Turns out the pivot was rusty, so I used a bunch of Blaster! to free it up, and now it pivots easily.

There are two "tow hooks" mounted to the front frame, and one needs attention.

This is the right side one.

I can't find any pix of the left side, but this is what it looks like with the tow hook plate removed.

 And the plate.

 

And the bolts.

 

The grey paint on the tip of the left bolt is the Toyota "Electro-Dip" primer. The middle one is degrading, and the right one has lost all it's protection. These will be replaced.

Worried about rust in the frame rails, I dug out my endoscope and used it to inspect the internal structure of the frame rails after I pulled the rubber plugs.

 The right hand side is clean as a whistle inside, while the left one showed some rust, but nothing bad, just surface rust. The frame rails will be coated inside with some of Eastwood's Internal Frame Coating. In fact, I'm going to go along under the car, and pull all the rubber plugs that are used to cap voids, and spray this stuff inside there, too. They say Rust Never Sleeps, and on these cars it never even takes a nap!

This weekend and the coming week look be be warm and dry, so I'll be cleaning and painting things in the garage, and doing a dive under the dashboard to remove the clutch master cylinder and the power brake booster so I can get cracking on the entire left side of the engine bay.

Stay safe, my friends, and keepeth thy head uponst a swivel! 

Let's See....Where Was I....?

 Had a post going, then got busy, then got clobbered with a "24 Hr Bug", etc, etc, etc.

Sooooo.....I isolated the issue with The Fisher down to the "Darlington Power Packs" that I've mentioned before here. The one in the right channel failed, probably when the Zener Diode in the on-board regulator shorted and nuked the transistors on the board. So I still have some more sleuthing to do to nail down the exact problem.

Yes, I've working on this receiver for over a year now. I'll be very happy to see it finished.

As far as my Toyotasaurus Supra goes, well....I've really been digging into it, and finding several things of interest.

To fix the rust properly, I had to pull the mounting brackets for the "Strut Rods", more accurately called a "Lateral Locating Link", because they 'stick into' the engine bay, and you can see them.

I took the whole shebang off the car first. Both strut rods and their mounts, and the antisway bar. Pulled twelve bolts, four nuts, the end links for the sway bar, and it dropped right out.

 Then I separated the parts. The nice one is from the right side of the car. The rusty one is from the left side of the car, where it lived under the battery, and took some guff!

 These will get sandblasted, and then repainted with some of Eastwood's "Extreme Chassis Black" paint. This paint is very good. It takes a while to fully cure, and of course, surface prep is important, but once it cures, It's ON There! 

I was planning on replacing the brake master cylinder, and it's a good thing I pulled it off. It was just starting to weep brake fluid out the back. It appears to be the OEM cylinder, as it's made by AISIN, which is an OEM to the Japanese auto industry. 40 years and 168,000 miles ain't bad for an OEM part!

 

As soon as I get under the dash, I'll pull the hardware for the brake booster and clutch master cylinder.

 That will allow me to get back in the corner and repair the damage from the "Great Brake Fluid Deluge of 1998".

 

 I also have a bunch of spots in the driver's footwell that need to be repainted, the result of the brake fluid leak. At least I have all the nasty carpet backing scraped out of the interior, and I went over everything exposed, and scrubbed it with my mix of Simple Green, Denatured Alcohol, and a good squirt of dish soap. It's amazing how much dirt and dust a car collects behind the interior pieces, and inside the doors.

 

And finally....I found this:

 

 That's one of the two main engine ground wires. It's a 10ga wire, and there's another one from the cylinder head to the firewall. This one is supposed to go under one of the starter mounting bolts. This means the "mechanic" who replaced the starter not only didn't put this back in place, but he coiled it around the fuel line so it wouldn't hang down and show.

 

Yep....did the job wrong, and then tried to cover it up! I've several other things like this on the car. One was improper hardware bolting something on the engine (wrong type bolt, and too short),  another one was really bad Bubba Work on some of the rubber air couplings in the intake tract, another was the really BAAAAD stereo installation, and another is the VERY sloppy alarm installation.

 

 

And I put new brakes on SLW's car. She had about 10k left on the pads, but she's going on a trip, so I thought it was prudent to go through her car and fix anything getting worn out.

Got some rain coming, but it'll be nothing like they get on the Eastern Plains here!

 

 Have a great and safe weekend, stay in CDX YEL, and enjoy life.

 

 

 

Catching Up....

 Yuk....got some kind of tummy bug or something, so I was down all day yesterday, and feeling somewhat better today.

 Found the problem in The Fisher, and now have to troubleshoot it.

Finally have all the rusty parts off the Supra, and will proceed with refinishing things when I'm feeling better.

 

Soggy Week....

 We got .77" of rain today, which brings us to 1.5" for the month so far. Had a hail storm go through and it dumped enough small hail to cover the yard and street. Pretty soft hail, so no damage, but Luna didn't know what to make of it. I opened the door to let her out, and when se saw the hail bouncing off the patio she recoiled, jumped back a couple of feet, and gave me a "You're kidding, right?" look.

So, it's been a bit too cold and too humid to do much in the garage besides organize things and clean up the area. Going to be in the 70's~80's over the weekend, so I'll be able to jump back in on things like removing the steering rack, and the rusty bits on the left front corner of the car.

Keep dry, and keep your head on a swivel!

Happy May Day, and a Supra Safari

 As opposed to "Mayday", which usually isn't a happy day.....

Weather's been pretty nice, so I'm doing my Day Shift activities outside, and then go on Second Shift for my projects. Day Shift is mostly yard work and general chores / clean-up things, and being with the grandsons when they're here, usually two days a week.

Still working on the Fisher, and it's going to be hand-to-hand once I really get back into it. I checked for stray bits of wire causing a short, carefully checked the back of the board for solder shorts, and pulled the heatsinks off the four transistors to verify they were properly oriented.

No joy

So now I have to start disconnecting things from the Power Amplifier stage to see which supply is drawing all the current. Stay tuned.....Details to follow.....Film at eleven.

On to more enjoyable things, like an old car.

First off, I'd noticed that the power steering fluid I put in when I installed the new hoses 2,000 miles ago (Yes, I flushed the system until it ran clear) was already getting a distinct shade of brown indicating it, or something, was breaking down and putting trash in the fluid. The right side steering rack boot was ripped when I bought the car, and the rack was dripping oil. I put a new boot on it when I rebuilt the suspension, but now I see the left side boot is ripped. It's dry, but but it only a matter of time before the seals go out on this side.

SO......A "Re-manufactured" power steering rack assembly (bought it 11 years ago!), new power steering pump, upgraded power steering fluid cooler, new outer tie rod ends, and new urethane bushings are going to be installed.

 The 40 year old OEM rubber bushings are pretty tired, and starting to squeeze out of their mounting brackets, so replacing them will make the steering more precise.

And the obscenely dirty, rank, gross, grody-beyond-the-max and possibly hazardous, carpet is OUT of the car!

In the Summer of 1998 (I found the receipt), the master cylinder for the clutch blew the seal out, and dumped about eight ounces of brake fluid inside the car, soaking the carpet. Since the seal rarely fails all at once, it was leaking inside for quite a while. I can imagine the Original Owner going bonkers adding brake fluid to reservoir constantly, and never seeing a drop under the car! Now it's bad enough to have a spill like this, but you clean it up as quick as you can. In this case, it looks like the carpet, the carpet backing, and the sound deadening mat on on the floor pan marinated in brake fluid for 27 years. And they all bonded together. The only way I can get the backing off the mat is to vigorously wire brush it.

This is after about 45 minutes of brushing it.

Still have more crud to get out of there, but it's coming along. I'm concerned about the mat itself, as it's butyl rubber, and may have to be scraped out and replaced. If it has to come out, I'll replace it with something like "Dynamat".

The passenger side isn't as bad, as all of the brake fluid dumped into the driver's footwell, but it's still going to take a bunch of brushing. All the grey stuff next to the transmission tunnel is what has to come out.

 

And we have a new addition to the fleet.

 The car on the right is the one I bought for myself a couple of years ago. I ran that one while grandson #1 drove my older ARRMA "Senton" short-course truck. He liked mine so much that I bought him the "little brother" of mine. It has a smaller motor and battery, but still goes like stink, and runs beautifully.

Let the games begin!

 

 

 

 

New Workbench

 

Yes, four days old, and already cluttered....

It was on sale at Home Depot with free delivery, so I went ahead and ordered one. A trip to Harbor Freight netted me a belt/disc sander, and bench grinder, and finally, a decent vise. 

The WEN drill press arrived Friday morning, and was a snap to assemble. The other drill press I had was more of a toy. It would do wood, plastic, and aluminum OK, but steel? Uh....no. It just didn't have enough torque to go through more than 1/8" of the stuff.

The belt/disc sander and bench grinder are Very Nice Things to have when fabricating, and nothing beats a wire wheel in a bench grinder for cleaning bolts.

The bench vise replaces the on I left in Long Beach like a dummy. I had the bench height adjusted where I like it, and then I put the casters on it, so now I have to lower it 2" to what I like.

And of course, a nice light over it. 

Remember the "Electrical Board" I built for the grandsons? They LOVE it!

Definitely a hit, and I hear murmurs of his cousins wanting one now....

They thought it was MAGIC when I hooked a coil I wound to the voltmeter and ran a magnet through it. 

ELECTRICITY FROM NOTHING!

They're having great fun learning new things, and getting patient, clear explanations of how it happens.

I love this picture for some reason...

 

And this is where I'm currently at.

Pulled the driver's side headlight bucket out to get at the RUST that was lurking under it. This has been completely scrubbed with a brush using my Magic Mix of Simple Green, Denatured Alcohol, water, and a good squirt of Dish Soap. 

Then I went over it again with the same mix and green Scotch-Brite. That really got it clean. I even managed to get a good portion of the really stained areas back to being white. Now I'm working on the rusty battery shelf, and I have to pull the mounting bracket for the Front Strut Rod ( a 'Lateral Locating Link' in tech terms) out of the car to sand blast. Which means I have to take the other one out, too, or the finishes won't match. Not hard to do, and it has to be done to change the front sway bar, so I'll swap out the front bar when I put it back together.

 The black shelf is the battery support, which I've already sanded and put a Rust Converter product on. The hugely rusty bracket is the one that has to come off.

And we had some really interesting clouds a couple of weeks ago.

Hope you all have a very Blessed and Joyous Easter.

Rejoice! He Is Risen!

Still Here, Busy As All Get-Out!

 I just haven't felt like posting. When I photograph and post things, it takes me away from doing things, and that can be a bit annoying....

Fed the trees and shrubs, checked (and repaired) the drip system for any damage sustained over the Winter, and got the hoses and sprinklers out and ready-to-go. If anybody wants some "Guaranteed To Germinate" Maple seeds, let me know. I've got a two gallon plastic bucket full of them!

Finally broke down and bought a decent workbench. It's a "Husky" from Home Depot. It was on sale, with free delivery. I put locking casters on all four legs so I can maneuver it around when required. It's set up, and I'm going to hang a LED shop light over it tomorrow, along with bolting down my new vise. Annnnd the new drill press is arriving Friday. Not sure if I'll bolt down the bench grinder yet. I'll wire wheel a bunch of bolts and see if it moves around any.

The Fisher RS-2010 is drawing excessive current. When I powered it up in the past, it would draw around 3 Amps at 120 VAC. Now that I've rebuilt the Power Amplifier Board it draws SIX Amps at about 25 VAC, indicating I bollixed something up, so I stepped back for a few days. I'm pretty sure I know what it is, as there was some ambiguity in getting two of the transistors in each channel properly oriented.  Not the first time I've goofed, and it won't be the last!

Work is proceeding at an accelerating pace on the Supra. I'll post some pix in the next day or two.

80* Last Week, and Snowing Tonight....

 Just gotta love Springtime in the Rockies!  

We've received a bit over an inch of rain this week, accompanied by daytime temps of 30~50*, nighttime temps in the 20~30* range, and a lot of wind.

Going to be warming up all this week, so I'll be back in the garage.

Results of the Fisher Smoke Test are negative; NO smoke was released!

More to come....

The Fisher Saga Pre-Test Tales

 The Last Transistor, and associated "extra" components, has been replaced. I verified my work with a checklist, and it's very close to being powered up. I have some tidying up to do, along with cleaning the soldering flux off the back of the PA Board, and I'll do that tomorrow with fresh eyes.

And I finally bought a decent workbench for the garage. Now I have a place to mount a proper bench vise, belt/disc sander, bench grinder, and a drill press.

 

Stand by for pix!

Seventy-Eight Degrees!

 And for my friend SiG, 19% humidity!

 Just gorgeous today, and I'm out in the garage painting some small parts, and dropping the exhaust manifold off the Supra so I can get at some bolts located behind it. Good thing I decided to do this, as three of the seven bolts were almost "Finger Loose", and the two end ports were blowing exhaust out. The other four bolts came out very easily, and were soon to be loose. The manifold is mounted on studs screwed into the cylinder head, and "Prevailing Torque" nuts hold it to the studs. All seven studs came out, but the nuts stayed on them. I'm having a difficult time getting the nuts off the studs, and might just buy new ones, as they're still available from Toyota.

The infamous Last Transistor for the Fisher RS-2010 got here yesterday, so I'll be installing those later today. I saved these two for last as they have an "extra" transistor (NOT on the schematic diagram) just "scabbed in there", and I still have to document what number transistor it is, and exactly how it's connected.

Hope you enjoy the upcoming weekend, as March will be going out next week accompanied by rain and snow here.

 Keep your head on a swivel, as with the warmer weather coming, things might get spicy....!

The Fisher Saga...The Last Transistor Is On The Way!

 

Yow, this receiver was a gen-you-ine PITA to source the parts for. There are two transistors in each of the two Power Amplifiers. They're what's called a Complementary Pair, which means one is a PNP type, and the other is an NPN type, and their characteristics are matched to each other.  There are several part numbers for each pair, -BUT- while I could easily find one of the pair, the other one was nowhere to be found for any of the suitable parts I was searching for. I was finally able to hook up with a forum member who had purchased a large number of these when they were still available, and after contacting him he agreed to sell me TEN of each type I needed.

So I now have enough of the correct parts to finish the Power Amplifiers, and have some spares for future use.

Happy Birthday to Ms. Swan

 

 She's 40 years old this month. I go by the door tag that says she was built in March, 1985, but I've never tried to dig deeper to see when she was built in March. Toyota could most likely tell, but they're not saying.

She has an interesting story.......

I bought her and drove her home on New Year's Eve, 2012, so I've really had her about 12 years and a few months. I looked at about a dozen of them, and all of them either had a  rod knock, rust holes you could put your fist through, trashed interiors that looked like they'd held raccoon fights, really bad body work, missing parts, or all of the above.

She was owned by the original purchaser for 27 years, and mostly had the typical maintenance a Toyota gets. She came with a shoe box full of receipts, so I was able to determine when some of the parts had been replaced, but I considered it a spotty record at best.

The original owners lived in Redlands, CA which is in San Bernardino County, which is a very dry, hot area, so NO RUST! They sold her to a single Mom who bought it as a bribe for her teenage son. If he finished High School, got his Driver's License, and a job, she would have given him the car and taken care of the maintenance, insurance, and licensing. Needless to say, that didn't happen, so she sold it to the guy I bought it from.

He said he'd bought it "To Restore", but judging from the JDM Honda Civic he drove up in, I doubt it. He said he was being forced to sell it because his girlfriend squawked about having to park her brand new Accord in the street, while his two off-road trucks, his three motorcycles, his boat and trailer, and his two other Honda Civics were taking up all the parking spaces at their place. He wanted $3500 for her, and while he said he knew I'd take excellent car of the and fix it up, nut if I wouldn't pay the price, he had "Ten kids lined up who wanted to buy it and drift it".

OUCH! A fate worse than death for these cars!

So I coughed up the Benjamins, and brought her home.

It's been a fun ride!

The Fiser Saga: Power Amplifier Autopsy

 Yeah, it's been a few weeks, and a busy time it was with the gorgeous weather we've had for the last week.

And then I got clobbered with the cold/flu/whatever. Anywhoo...feeling much better.

Back to the Fisher RS-2010 Stereo Receiver I've now had almost a year. Yes, I'm embarrassed, but it turned out to be a LOT more work than I estimated. I'm now down to searching for ONE transistor, with all the rest having been sourced, and on-hand. The issue is that it's one of what's called a Complementary Pair, and while a sub for one of the two is readily available, it's compliment is not. Soooo....I have to dive into either finding a vendor with some in stock (NO eBay or Amazon....too many fake parts!), -OR- start going through the "sub-for-the-sub" routine, and find a complementary pair that's available. 

Bags of new transistors awaiting their long overdue compatriot.

It gets a bit tedious....

 

So what killed several transistors, and let the smoke out of three resistors? Who did the dirty, dastardly, despicable deed?

'Twas a shorted Zener Diode, it was.... that's what who dunnit! 

The diode in question is labeled "DO6" in this clip:

 In this application it's being used to develop a voltage which is 12 Volts less than the supply voltage, rather than developing "just" 12 Volts. They do this because the entire amplifier is isolated from "DC Ground", and floats between the +60 Volt and -60 Volt power supplies. The only transistor in this circuit connected to the chassis, is Q06. When the diode failed, it put Q04 into saturation (FULLY turned on), meaning it had only .65V drop across it, which in turn took out everybody connected to it by putting them into an over-voltage condition. A classic example of a Cascading Failure.

So that's where I'm at right now, changing transistors, and getting ready for a brief test when they're all replaced. After I verify all the voltages are back to where they should be, I'll be ready to run it at 50% power for a few hours while I monitor the temperatures to make sure nothing goes bonkers, and then run it Pedal-to-the-Metal for a couple of hours to see how it well it performs.

 

Gettin'n close, finally, to a resolution on this one.

Groan.....Got Clobbered By Something

 Been flat on my back since Monday. Aches like I've never had (even my knees hurt),  coughing, sneezing, going between sweats and chills, and all sorts of other things.

Finally got out of bed today for more than 30 minutes, and while I'm still a bit wobbly, at least I'm feeling somewhat better.

Fifteen Years of Wedded Life....

 

 Was celebrated yesterday. My Sweet Little Wife, knowing me rather well, decided to get married on Valentine's Day so I'd never forget what day it was.

Pretty smart cookie, she is! 

Her Maid of Honor and the Minister who married us will be out here in May for a Girl's Trip, so we'll renew our wedding vows while they're here.

I didn't really think I'd get married again, but then she came into my life and completed it.

I love you, honey, and I'd do it again in a femtosecond! 

Work continues on the Fisher RS-2010, and I finally sourced all the transistor needed to finish it. The parts should be here this coming week.

 

Have a pleasant weekend (snowing here and cold), stay in Condition Yellow, and stock up on popcorn. I think the next few months will be 'interesting'.....

The Fisher Saga....Chasing Classic Parts

 

With apologies to Wayne Carini.......

One of the things about working on old equipment is that sometimes the parts are hard to find, especially if they were declared obsolete years, or decades, ago.

Now while most passive components like resistors and capacitors are readily available, some of the semiconductors are not. Diodes are easy to find, and even the infamous "Darlington Power Packs" now have discrete versions available, but most of the Small Signal Transistors have been extinct for quite some time.

The issue then becomes finding suitable replacements, of modern manufacture. Most "US" transistors have a "2Nxxx" number on them, like one of my old favorites, the 2N2222.

Japanese transistors use a completely different numbering system, as explained on Wikipedia:

"The Japanese technical standard JIS-C-7102 provides a method of developing part numbers for transistor devices.^[1] The part number has up to five fields, for example in the number 2SC82DA:

• The first digit "2" indicates this is a 3 lead device ( a diode would have a prefix numeral 1)
• The letters "S" is common for all EIAJ registered semiconductors
• The following letter designates polarity and general application of the device. For transistors:
  • A PNP high frequency
  • B PNP low frequency
  • C NPN high frequency
  • D NPN low frequency
  • E P-gate thyristor
  • F N-base unijunction transistor
  • J P-channel field effect transistor
  • K N-channel field effect transistor
  • M bidirectional triode thyristor
• The numerals following indicate the order in which the application was received, starting at 11
• A suffix letter indicates improved characteristics....."

OK, so that at least tells me about what they are, but to find out exactly what they are, I had to get the datasheets for each (obsolete) part number. The datasheets list all the parameters for the described part number, and from there, you can use the selection guides on the vendor websites (I like Mouser the best) to find currently available parts with matching specifications.

But what if you can't find a datasheet? Remember, these are obsolete parts, and sometimes a datasheet hasn't been scanned and posted somewhere. Well....then you're getting down to hand-to-hand combat. First you look at the schematic, and see what the applied voltages are, and make a best guesstimate as the the current and power dissipation required.

This is the schematic for the right channel of the power amp :

At this point I've found current replacements for all but three of the original transistors, but it's going to take a bit longer to decide what to use for the last three.....

Sixty-Seven Degrees....In February?

 And it might hit Seventy on Monday. And it's been pretty windy, with wind warnings of sustained winds of 50~60MPH, with gusts to 85+ up around the Colorado/Wyoming border.

The dog sure loves it as she can sit outside, pull her ears back, half close her eyes, sit into the wind, and sniff, sniff, sniff about as long as she wants to.

Picture from November:

 

Had the windows open to air out the house, and even did a bit of yard work, and admired the new fence. Yes, the installers used metal poles, like for a chain-link fence, dug the holes with a little tow-along auger, and set them in with QuickCrete, plumb-lines, and levels. The next day they hung the new panels, and cleaned up the remaining bits and pieces of the old fencing.

 

Looks nice, but I see I forgot to secure one of my radials to it.

And work continues on the Fisher receiver, with a big post to follow.

Hope you all had a blessed, peaceful Sunday, and stay in Condition Yellow.....

The Fisher Saga....Power Amplifier Autopsy

 

 Or should that be Odyssey?

You might be thinking that since this was the "Original Problem" that brought it here I would have tackled it first, and I did do some troubleshooting very early on this assembly.

BUT....(always one of those...) when I noticed the underrated capacitors, the extra parts on this board, the out-of-date "Service" Manual that doesn't match the "As Built" configuration, and the tuning mechanism that fell apart in my hand, et al, I knew I needed to address those issues before I continued on. 

So I took care of all the other issues this receiver had before going into the Power Amp. 

After carefully bringing it up on my "Variac" while monitoring the current (YAY! NO smoke!), I started checking the voltages on all the transistors. ALL of them were way off, indicating some other issues on the board. A search on the AudioKarma forum showed that this is commonly caused by some of the diodes used to bias the transistors were failing. Sure enough, two of the six diodes used were shorted, and both of the 12V Zener Diodes had failed; One shorted, and the other not regulating at 12 Volts. Unfortunately this took out a couple of small signal transistors on the board, so I have to make another trip down Substitution Lane to find some suitable, currently made transistors.

So the work continues, one step at a time......

Tonight's Weather from Fort Collins....

 And YOWZIR! It's gonna be COLD the next few days. We've had a night here and there that were below zero, but this week should break the record for the season

Started snowing around 1700, and now at 2140, we have a good 3" on the "Snow Table", and it's still kinda-sorta snowing. Looks like dry, fluffy snow, and it's going to stay that way. Should be easy going for the Ariens tomorrow.

Took advantage of the 60* ( ! ) weather the last few days and knocked out some yard work. Got the Big Back Gates secured properly for winter weather, and cut six more logs up and stacked them in the garage. After they finish drying (Reeeeal fast here with the low humidity) I'll split them up for the wood box. I'd really like to find a place where I could get some "logs" about 6~10" in diameter and 6~8' long. I can cut them to 18" lengths for the fireplace, rack 'em in the garage, and split-as-needed, which is what I've been doing with the huge limb that came down from out Ash tree in the back yard. Geez....We've gotten four years worth of firewood from that fall!

Annnnnnd.....Work continues on the Fisher, with another post in the works. That thing has some very poor design and layout issues, other than the low cost capacitors they used.

And it takes some and digging around when the Service Manual is wrong, the parts called out on the schematic don't match the parts in the Parts List, and some other things.

Take care of yourself, take care of each other, and keep that head on a swivel!

Took a Week, But I'm Feeling OK....

 Thought I was feeling better, but then it smacked me again on it's way out the door...

ANYWHOO....work continues on numerous things. I'm making up an "Electrical Experiments Board" for grandson #!, although I'm sure his younger brother will enjoy it, too.

It will use one of the LiMH batteries from the small R/C trucks we have, and an assortment of switches, lights, bells, buzzers, and motors. Kind of like an "Electrical LEGO Set" that they can use to learn how to hook things together using wire and "Fahnestock Clips" for the connections.

And of course I'm rolling along on the Fisher RS-2010 receiver. The next post about it will be on the rebuild of the Power Amplifier Board. Had some bad diodes that threw all the voltages off, and clobbered a couple of transistors. Looks like another trip down "Substitution Lane" to see what modern parts are suitable.