billfort;n60883 said:Ok, I'm not breaking out the Zeppelin records, but some Ella, Billie, sliding into some Muddy and Buddy - they are here (or am I there?) - THIS is why have all this stuff.
An 85yr old tube wrapped in a simple old circuit, simple enough that even I could build the thing...
Man, I love having this stuff in my basement to keep me sane.
billfort;n60900 said:Did a little looking and can't find the schematic - not sure what happened to the copy I thought I had saved. Don't even remember where I got the circuit from, think it was from a friend who had built it before. It's a low parts-count, extremely simple design (which might be why it works so well to my ears - less is more?), so I should sit down and sketch it out again.
dowto1000;n60941 said:Personal 2016-2017 FINALS tube experiences, Type 45, Type 46, and JJ 2A3-40, on ALTEC VOTT speakers :
Well, I have to agree with Redboy on trying a Type 46 SET. I designed and built a DC Type 46 amp, for a friend in May of 2017, and I think it is better than both Type 45 amps, with the same basic circuit - a good one, that I was running on my VOTT A7-800s, during 2016 and 2017.
The most surprising thing to my ears, was when I dropped JJ 2A3-40s into my DC Type 45 SET in December 2016, and heard it WAY outperform my Type 45 tubes, in the Finals spot. The hilarious thing was that the JJ 2A3-40s were using the biasing of a Type 45, but they way outperformed any 45 I had heard.
The range that was most convincing to me, in favor of the JJ, was on piano, in the middle mid range. The 45s had a shallow broad midrange suck out, and could not play a piano convincingly, on my system, whereas the JJ 2A3-40 stood up and hit the ball out of the ballpark on piano reproduction in the mids, with LINEAR power. The Type 45's weaknesses I hear, I do NOT seem to hear on this four month old Type 46 amp, using the same basic DC SET circuit I usually use for my system
To be honest, I personally feel I wasted two years of my life in 2016-2017, messing around building and using Type 45 DC SETs on my A7-800s VOTTs.
Yes my friends, I hear all the good things 45s do - that everyone talks about, but they can not play a piano linearly in the middle midrange, and as such, I will never use a 45 again. Sold every one of my 45s, 68 of them, on eBay, several months ago
YMMV, but I prefer this 5-2017 Type 46 amp's presentation, in all areas, over both my 45 amps. I agree with Redboy on the Type 46. I do feel, the Type 46 has a very very SLIGHT coloration, a " euphonic" coloration, maybe its from the extra tube element, that a JJ 2A3-40 triode seems to avoid. But my 46 amplifier can play back a piano - to my liking.
My next builds will be two monoblock JJ 2A3-40 DC SETs, staring right after I return from this year's RMAF Denver show in October.
Another 2017 discovery, after building / hearing a dual mono JJ 2A3-40 amp in January 2017, I can not go back to using a stereo amp ( shared L--R supply ) any more on my ALTECS. Hence, the two monaural amp builds, which are coming up !!
I hope my observations serve some of you DIYers well. Have fun, I do.