L0rdGwyn's DIY Audio
May 21, 2021 at 5:14 PM Post #2,596 of 3,344

L0rdGwyn

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Almost done, maybe 85%, working my way from output to input. Input stage is next.

PXL_20210521_211131705-2.jpg
 
May 21, 2021 at 5:37 PM Post #2,597 of 3,344

whirlwind

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You are not messing around!

Nice chassis...nice and roomy

Thats a lot of soldering.
 
May 21, 2021 at 11:28 PM Post #2,599 of 3,344

bcowen

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Almost done, maybe 85%, working my way from output to input. Input stage is next.

PXL_20210521_211131705-2.jpg
Very nice! And unless I miscounted, you're going to need 7 of these. Whew. Getting pricey. :stuck_out_tongue: :stuck_out_tongue: :stuck_out_tongue: :stuck_out_tongue:

1621653983850.png
 
May 22, 2021 at 7:48 AM Post #2,600 of 3,344

L0rdGwyn

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Very nice! And unless I miscounted, you're going to need 7 of these. Whew. Getting pricey. :stuck_out_tongue: :stuck_out_tongue: :stuck_out_tongue: :stuck_out_tongue:

1621653983850.png

LOL just five thanks very much, mains fuse, two transformer secondary fuses, and two cathode fuses on the 801A, a casual $800. For audio nirvana, it's worth it :wink:

Back at it this morning, going to try and finish before noon.
 
May 22, 2021 at 2:51 PM Post #2,602 of 3,344

L0rdGwyn

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And the amp itself. Note that the grid caps leads were meant to be sleeved in paracord, but it did not arrive in time, so just bare cable jacket for now, but have to admit I think it looks good in black.

PXL_20210522_183301863.jpg PXL_20210522_183314667.jpg

PXL_20210522_183322334.jpg

PXL_20210522_183334690.jpg
 
May 22, 2021 at 2:56 PM Post #2,603 of 3,344

A2029

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Alright, it's done.

Circuit first...

PXL_20210522_172442612.jpg

PXL_20210522_172449421.jpg PXL_20210522_172455933.jpg

PXL_20210522_172547257.jpg
And the amp itself. Note that the grid caps leads were meant to be sleeved in paracord, but it did not arrive in time, so just bare cable jacket for now, but have to admit I think it looks good in black.

PXL_20210522_183301863.jpg PXL_20210522_183314667.jpg

PXL_20210522_183322334.jpg

PXL_20210522_183334690.jpg

Beautiful! I really dig the grey chassis, reminds me of old school military gear. Congrats on the build Keenan!
 
May 22, 2021 at 3:44 PM Post #2,604 of 3,344

Galapac

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And the amp itself. Note that the grid caps leads were meant to be sleeved in paracord, but it did not arrive in time, so just bare cable jacket for now, but have to admit I think it looks good in black.

PXL_20210522_183301863.jpg PXL_20210522_183314667.jpg

PXL_20210522_183322334.jpg

PXL_20210522_183334690.jpg
Call it the B-19 cause it’s the Bomb! Congrats! You always amaze me that you can put these together so fast with no issue.
 
May 22, 2021 at 4:32 PM Post #2,605 of 3,344

L0rdGwyn

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Beautiful! I really dig the grey chassis, reminds me of old school military gear. Congrats on the build Keenan!

Thanks, Mischa! That's kinda what I was going for, sort of a Hickok TV-7D/U look, glad it comes across :)

Call it the B-19 cause it’s the Bomb! Congrats! You always amaze me that you can put these together so fast with no issue.

Thank you sir. There is always at least one hiccup. This time it was underrating the negative supply secondary fuse for inrush, which had me searching for a short that didn't exist 😂 increasing the rating slightly solved the problem. The trick to building amplifiers quickly is doing literally nothing else for three days.
 
May 22, 2021 at 5:12 PM Post #2,606 of 3,344

L0rdGwyn

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I swapped out the Tung-Sol 6BX7 for some Japanese Toshibas. I have pretty much every type of 6BX7 under the sun from the Glenn OTL days, these were one of my favorites. The heaters have a very nice glow.

PXL_20210522_210737216-2.jpg
 
May 22, 2021 at 5:54 PM Post #2,609 of 3,344

L0rdGwyn

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Is it too early to say whether you have achieved your design goals?
(Please don't paint it black).

I would say the design goals have been achieved! Only able to listen for a few hours, night shift is a bummer, but of course this isn't the first time I've listened to this circuit. The sound is the best of the amplifiers I've designed, particularly the low end, really unlocks a new level of bass potential from my Snells.
 

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