I dropped in to a house contents sale on Saturday and picked up a console unit that someone had retro-fitted with some SS equipment. It contained a Dynaco PAT-4, and an AF-6 both in mint condition and working perfectly and a Dual 1229 that works but has a slight scraping sound. My guess is that it just needs some adjustment and lubrication.

For amplification it had 2 monoblocs that look like a kit build but I can't find any trade name markings at all. They are very dusty and need a good clean up but I took some pics (attached) just in case someone can identify them for me.

I hooked the Dynaco's up with the amps and connected my EPI 100's. At just over halfway on the volume knob of the PAT-4 I was getting good clear stereo sound from the speakers! Anyway the whole lot cost me $50 so with eveything in working condition it was a great deal!

Those are cool little amps! I don't recognize them altho the little square heatsinks on the driver transistors are familiar. I'm most familiar with the dyna kits and the tiger kits from SWTPC, these don't resemble either of those.

Could these be Heath or Lafayette?

those are the SWTPC tiger kits, 80W. I built 2 of them myself so know of which I speak. Treat them gently and they should do quite well. I blew mine up while testing for THD while at work. Mods were offered for osc. suppression on them. Mine were unmodded. I still have them out in the garage on a shelf waiting for me to install the mods.

I agree. The tiger was originally a 2 channel chassis, and was later dubbed "Super Tiger" and sold as monoblocks.

the Popular Electronics build them article was titled "Universal Tiger". I quickly ordered the swtpc kits and jumped in with both feet. Fun to build. Still have the mag and all the schems and build instructions, parts list etc. and all the mod articles that showed up. and some parts.

Interesting, i didn't recognize them as tigers with such a short chassis. The mono blocks i built were either 70 or 90 watt, in a deep narrow chassis painted gold. Eventually built a pair of the tiger/201's, nothing to write home about sonically but they'd easily heat a small room. The smaller kit amps are indeed fine sounding amplifiers, better IMO that the dyna ST-120 just not as pretty.

EDIT: These must be earlier tigers, all my tiger kits had 5 way binding posts for terminals. after looking at the pics again im sure my small tigers had the driver boards mounted vertically between the output heat sinks and the power supply making the chassis 4 or 5 inches deeper and only a 4 inch or so overall width.

Thanks for the help. I had no idea they were that powerful. So when you say 80 W. I assume each one is 40? Are they also just supposed to run off the preamp controls? There is not even an on/off or a volume control. Did they also sell a housing to contain them or what I have is the whole thing? Boy this opens up a whole new set of possibilities! I have been thinking of setting up my system for bi-amping so maybe I could use these to drive the high end. Any idea of the specs?

Sorry - now I'm getting excited! I didn't mean to flood you with a ton of questions. Many thanks.

THere is a page full of Southwest Technical Products scans and info. Heavily biased (so to speak) towards their computers, but some stuff on the hi-fi gear, too.

http://www.swtpc.com/

Awesome! Thanks mhardy, those catalogs bring back some memories for sure.

I see budsker's amps are actually Mark II's at 90 watts into 8 ohms, i wish i still had the .01's, the smaller ampifiers have to be heard to be appreciated.

Nice score budsker!

they are each 80w amps, not 40 each and no they didnt come with or avail. cabinets or anything just the bare chassis as you see. to be used with a preamp, no on/off sw or vol control. Very bare bones for a pure component system. Anything more sufisticated was up to the owner/builder to do.
swtpc did offer a fet preamp kit to match.
The tiger specs were as good as most such amps goin back then.
<.5% dist. 20-20khz
freq resp. 3db down at 1 and 100khz
hum/noise >80db below 1 wattrms
damping factor >100
sens. 1.5 volt for full output
Hirsch-houch labs did a perf. eval. on the tiger 80w amp and rated it very highly. I have the report that came with the kits.

Thanks Oldhifiguy! 80 watts each-wow. I was looking at them again and there is something I thought might be a volume control but I guess not. If you look at the 4th pic in the series of pics there is a small half moon shaped small brown board sticking up above the chassis. On the amp side of those boards there is a slider that moves over the arc from 9 to 3 o'clock. Can you tell me what those do?

the orig build had only 1 pot and that was a dc offset or bias adj pot, don't know which just now, on the driver bd. You may have one that has had some mods done, as the orig didn't have anything back there where those pots are. See if you can determine where that thing is connected back in the ckt and it may reveal its function. I can check the docs. I have if you find its connection. I have all the orig docs and mod info.
PS: it's a diff input, full dc coupled complimentary output design. The hot thing goinback then. Everyone was doin it.

Hi oldhifiguy. They are connected to the RCA input jacks and then down to the board through two holes marked "A" and "B". They definately affect the volume. All they way to the right and nothing comes out. All they way over to the other side and tons of volume. I guess they are a gain pot for the input.

Anyway many thanks again for your help. They are kinda cool but I'm not sure what to do with them. The sound is very good on the highs and mids are really strong, but not much happeneing on the bass.