ToolShedAmps Posted December 18, 2018 Author Share Posted December 18, 2018 Thanks Jimbo! As to the question, that's entirely up to Austin and the rest of Scott's family. However, there should be a few more of this version of the Euphoria floating around out there by the pilgrimage. Quote Link to comment Share on other sites More sharing options...
MEH Synergy Posted December 18, 2018 Share Posted December 18, 2018 Beautiful work you guys do. VERY NICE. 3 Quote Link to comment Share on other sites More sharing options...
ssh Posted December 18, 2018 Share Posted December 18, 2018 Great job, Matt. I know that the family will be grateful to have this reminder of Scott's love of music. SSH 1 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 19, 2018 Author Share Posted December 19, 2018 After some deliberation, and since this amplifier has no headphone output, I ultimately decided that the slight lowering of the noise-floor by using DC heating on the driver tubes wasn't worth the sonic trade-off, and, since this custom power tranny has separate 6.3v windings (one for each channel) I used AC heating with virtual center taps as per usual. This pic shows how I typically leverage the space below the power transformer to mount connection points for power supply wiring/DC rectification (when necessary). In the pic you can also easily see both the "slow-start" MOV and Class X "pop-stop" capacitor as typical on amplifiers using a directly-heated rectifier. 3 Quote Link to comment Share on other sites More sharing options...
MATT0404 Posted December 19, 2018 Share Posted December 19, 2018 I've really enjoyed reading through this thread and seeing the progress. Great work, as always! Thanks for walking us through this tribute build. 1 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 19, 2018 Author Share Posted December 19, 2018 As much wiring is completed as possible prior to building the "turret-board" that is suspended above the front section of the amplifier. This turret board is where all of the circuit connections are made to the devices that are soldered to the tube sockets. I build mine out of 1/8" fiberglass board and individually "swage" each turret using a press I built for this purpose. Doing this rather than buying "tag strips" or pre-made turret boards allows me to design the layout and connection points EXACTLY where I want them with no waste. A pic of the board layout I developed for Scott's amp (and all Euphoria 2a3's coming up) will be attached to the next post...... this one is yelling at me about max file size... As I sit here typing, I'm amazed at the SQ of this amplifier.... another bonus, although I designed this amplifier to maximize the sound quality of the 2a3 output tube (my favorite operating points using a 5K primary OT), by dropping in a 5R4GY rectifier, this amp is perfectly safe for use with the "45" output tube. It sounds glorious on this last day of burn-in driving my Cornwall 3's with a very, very old pair of engraved-base Philco 45's. 2 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 19, 2018 Author Share Posted December 19, 2018 1 Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted December 19, 2018 Moderators Share Posted December 19, 2018 I know nothing about the inside of an amp but I do know if anyone deserves this it would be Mr. Yocum, one of the nicest people you could ever meet. Here with good friend Steve, two great guys. Thank you for Memorializing him like this, he is smiling. 5 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 19, 2018 Author Share Posted December 19, 2018 Without boring y'all with the details, here is the completed circuit. With the top-plate finished, it can be installed in it's wood base. 4 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 19, 2018 Author Share Posted December 19, 2018 Here is the plate (gut-shot) mounted in the wood base...... as you can see, enough room to work but not much else. ToolShed Amplifiers are only as large as they have to be. I've designed the amplifier to have the coupling capacitors easily accessible should customers feel the need to "roll" those too.... 4 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 19, 2018 Author Share Posted December 19, 2018 Top-side of the amp prior to wiring and installing the front and rear plates. The last photo's I'll post will be the ones I take today after the bottom plate is installed (post burn-in) in preparation for shipping this evening. I've really enjoyed my time listening to this amplifier during burn-in and can say without reservation that my Cornwall's have never sounded so good. At least until the next one burns-in..... 3 1 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 20, 2018 Author Share Posted December 20, 2018 Here are a couple of pictures of the finished amplifier......... 5 1 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 20, 2018 Author Share Posted December 20, 2018 6 1 Quote Link to comment Share on other sites More sharing options...
cincymat Posted December 20, 2018 Share Posted December 20, 2018 WoW! Simply gorgeous.. Cincy 2 Quote Link to comment Share on other sites More sharing options...
mikebse2a3 Posted December 21, 2018 Share Posted December 21, 2018 On 12/19/2018 at 1:17 PM, dtel said: I know nothing about the inside of an amp but I do know if anyone deserves this it would be Mr. Yocum, one of the nicest people you could ever meet. Here with good friend Steve, two great guys. Thank you for Memorializing him like this, he is smiling. I had a few opportunities to talk with Mr Yocum at the last pilgrimage and remember him as a very nice person. miketn 1 Quote Link to comment Share on other sites More sharing options...
mikebse2a3 Posted December 21, 2018 Share Posted December 21, 2018 @ToolShedAmps Thanks for all the effort and work you did in showing us how you build your beautiful amplifiers. miketn 2 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 22, 2018 Author Share Posted December 22, 2018 22 hours ago, mikebse2a3 said: @ToolShedAmps Thanks for all the effort and work you did in showing us how you build your beautiful amplifiers. miketn Thanks Mike! The Yocum family should have it either today or Monday at the latest. Perhaps they will listen to some holiday music through it. Thanks for following along.. Cheers All! Matt. 2 Quote Link to comment Share on other sites More sharing options...
MC39693 Posted December 23, 2018 Share Posted December 23, 2018 Thanks for sharing your outstanding work. I’m sure the family will appreciate your efforts. Merry Christmas . 2 Quote Link to comment Share on other sites More sharing options...
ToolShedAmps Posted December 23, 2018 Author Share Posted December 23, 2018 5 hours ago, MC39693 said: Thanks for sharing your outstanding work. I’m sure the family will appreciate your efforts. Merry Christmas . Thank you very much. Merry Christmas! Quote Link to comment Share on other sites More sharing options...
ssh Posted December 26, 2018 Share Posted December 26, 2018 Someone got a very special surprise for Christmas. I hope to hear it soon. SSH 1 Quote Link to comment Share on other sites More sharing options...
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