World War II Champ Project

[eleventeen]

In an immense pile of stuff now largely headed to the ewasters, I pulled 2 qty of these cute little chassis out of 2 ART-13 radiotransmitters. Three octal sockets, three transformers (none of which, I'm afraid are of any value) I think I'll build two early 6SL7 based Champ amps! I may reconsider after I cost out all the stuff I'll need, but these are just begging to be made into some mini-Champs.

Let's see if I can embed these pix.......

[PRR]

> I pulled 2 qty of these cute little chassis out of 2 ART-13 radiotransmitters.

You didn't take the whole ART-13 ? ? ?

There's a couple big 811 bottles driven by the audio chassis you nabbed. Two 811 will put out 150W-300W lovely audio power.

> three transformers (none of which, I'm afraid are of any value)

Check again. Much Collins stuff is collected.

Don't lose the Ken-Rad SK7, sweet tube.

The 9-leg transformer and a 6V6 is most of a good headphone amp, though you will have to RE the impedances. Notice the NFB to cathode.

[eleventeen]

Nope, I have the entire ART-13 * 2 qty. There are 811's, an 813, and an 837 in each. Along with those I got really large quantities of NOS Ken-Rad 6SK7's and probably 1500 total tubes, mostly NOS. The tube cartons are so delicate, they typically fall apart when I try to open them.

The ART-13's are beautifully built. Incredible gear tuning mechanisms, vacuum switches, hundreds of hours of labor building these, that's for sure. If anyone needs any of those old metal tubes, let me know. Silly cheap, basically pay for shipping and you can have a few of whatever you want, as long as I have them in decent numbers. On ebay I am actually trying to get real money for about 25 qty GE 5Y3WGTs/6087 brown bases, very nice, and I've sold a few. And about a dozen Sylvania NOS 6L6GA's and some 1944 Tung-Sol 6L6G. Huge pile of 6L6M. 5R4's, 6SN7, 6SL7, 12SL7 for days. What ticks me off is that when I was surveying this stuff in the old guy's ("take it all, get it out of here!") garage, contemplating my offer, I could have sworn I saw two full sleeves of NOS RCA 6V6's which I can't find now. I got about dozen 6V6's but they are motley brands, very few the same. All NOS, though. About 120-150 of the tubes are conceivably useful; I will probably try to trade the goobers 15:1 or 20:1 for useful tubes if I can find someone who's in the biz.

You know what blows? Champs use the same power trans as a Princeton, which (for me) is a lot more desirable amp. (Not that you could fit one on one of these puny chassis without really pushing the envelope of manual dexterity, lead dress, and component spacing. By that I mean, you have to spend real money for a silly little Champ xformer if you want 360-0-360, 5V, and 6.3 volts. And, it's not every salvaged old hi-fi power tranny that's 720 VCT, in fact it's fairly rare until you get a pretty large tranny tranny that could power a pair of 6L6's. Most of them put out quite a few less volts.