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Weird Amps Nobody Remembers

Thanks to you guys for referencing Southwest Technical Products, and especially to you Francis, for providing that link. It's real trip down memory lane. The first time I soldered a component to a circuit board, it was to build one of their strobe light kits. I had never seen a catalog, but learned about them from the hobbyist magazines. Later, the first PA company I worked for had a "rack" of a dozen Universal Tiger amps that the owner had built himself -- about 10 of which could be counted on to work at any given point in time. Happily, I only worked with those a couple of times before they were replaced with six first-generation Crown DC-300s.

The Yamaha 2200 power amps referenced elsewhere had the greatest "VU" meters ever included in an amplifier, IMHO. I learned a lot about the logarithmic nature of the decibel scale from watching those meters... they even had a scale that indicated power output in watts. Very enlightening for me at the time.
Those Universal Tigers were popular when I was in high school; I remember schematics of them circulating around, as well as some off-shoot modifications f the basic circuit.
 
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Polytone. Not weird but old and Im not sure how many people remember them.

Hard for me to forget them, I've had this Polytone MiniBrute III since 1980:

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But yeah, I don't think they've made amps in a decade or more...I think they went out of business when the founder died.
 
The Guess Who used to use Garnet amps from Canada. Kurt Winter and Bill Wallace even wore their promo shirts. Never saw one close enough to check out (the amps, not the shirts). They sounded good on the records. The Herzog was what made Randy Bachman's "American Woman" guitar tone.
I had a Garnet bass combo amp. 112, tube, 30 watts. It was a nice little amp!
 
I remember some now, after giving it some thought.
-Galanti Minuteman: a little, 5 Watt guitar amp with a 12" speaker. Probably really meant to be an accordion amp. Actually sounds very nice.
-Newsom: a tiny sub-5W amp with a 6" speaker and several different types of inputs. Probably originally a powered speaker for a film projector. Sounds terrible.
-Sound Projects: another 5W wonder. A lap steel amp from the 1930s. Sounds... okay, I guess.
-Electar: a lap steel amp from 1936 made by Epiphone before they were owned by Gibson. Vastly underpowered for its size.
-Rickenbacker M8 and M11: These were almost exact copies of Fender's early Champ and 5C3 Deluxe amps. Ric never made a ton of amps so you seldom see these around.

There are others I have in various states of disrepair. I wish I had as many obscure bass amps as I have guitar amps (Bass is my principal instrument. I can play some guitar but mostly I just like repairing the amps.) but there weren't as many underground bass amps to be had as there were guitar amps. My bass gear is, for the most part, run-of-the-mill stuff.
Lectrolab was made by Sound Projects. Great harp amps, and clean sound for guitar. They blend well when others are playing acoustics.
 
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My dad built a receiver. IIRC, they were P2P
I have a Heathkit AR-1500, which first shipped in 1972. It has one circuit board (or set of boards) per function, with edge connectors on the boards that are wired so that they can be taken out of the chassis without unplugging.

There are a couple shots of the innards on this page about the AR-1500. I imagine that trying to pack all those functions (power supply, separate AM/FM tuners, switched preamp with tone section and additional tuning controls, phono preamp, 60 Wpc power section -- times two because stereo) into a reasonable case size with point to point wiring might not be impossible but would be egregiously expensive even by the standards of early 70s electronics. The component population on the boards is pretty spacious by modern standards though I suspect that packing things tightly together would make this a pretty hostile project for home hobbyists. This sucker weighs 42 lb, and that's without having a massively overbuilt audiophile-approved case.
 
I’ll need to dig into the deeper boxes on the garage shelves to unearth it but I still have my SWTPC Tiger 40 (stereo) and the matching preamp. SWTPC and PAIA (especially the Craig Anderton projects) were two sources of a lot of learning and satisfaction back in the day. I have a rack that still has Anderton’s Quadrafuzz. That was a really fun one during the short time that I played guitar. Thanks for the nostalgic reminder!

Addendum
I also still have the cab that came in my Heathkit TA-16 solid state guitar amp around 1967-68. The rest of it is lon-n-n-ng gone. It was a 25W all-transistor amp that used two 12” Jensen speakers. The control arrangement resembled the Fender Twin but nothing else about it did. After scrapping the electronics I hacked in a stereo SWTPC Tiger 25 (one output to each speaker) and a separate preamp. That worked much better but the solid state of that time was terrible for anything but jazz (also of that time). After several years of non-use I gutted it and put it on the shelf where it languishes.
 
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I still use a pair of SWTP 207/A monoblock amps in my second stereo system. Paid for themselves about 50 years ago.
They didn’t fail? Those weren’t terribly reliable because of the times and limited short circuit protection.
 
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They didn’t fail? Those weren’t terribly reliable because of the times and limited short circuit protection.

Yeah, they definitely did have that reputation. Not sure if the later 207/A that I have addressed that (versus the original Tiger .01), but in my case I've only had to replace the two power supply filter caps to restore quiet after some impressively loud motorboating.
 
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Mosrite sold a line of guitar and bass amps for a very short time. I owned a Gibson Atlas bass amp for a long time. Bought it in 1965. The bass pot failed shortly after I got it and it never sounded good after it was repaired. Probably not a surprise since the bass control had a 4-gang pot stack on the shaft and they probably mis-wired something. 40 watts of 6L6 power with a singe 15" speaker. This is am image from a sale site. Mine was brown.

Rick B.

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