L0rdGwyn's DIY Audio
Jan 14, 2021 at 3:13 PM Post #1,711 of 2,285

UntilThen

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Jan 14, 2021 at 3:14 PM Post #1,712 of 2,285

UntilThen

Headphoneus Supremus
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Jan 14, 2021 at 3:17 PM Post #1,713 of 2,285

UntilThen

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Here are the filament and mains transformers before and after shielding. Gives you an idea of what the final look is going to be sans tubes.

IMAG2939-2.jpg IMAG2945-2.jpg

Woah can I have that. I'll name it UntilThen. What is this? Speaker amp or headphone amp or just a night lamp? Ok kidding but looks very nice even half finish. What is it?
 
Jan 14, 2021 at 3:21 PM Post #1,714 of 2,285

Tjj226 Angel

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Woah can I have that. I'll name it UntilThen. What is this? Speaker amp or headphone amp or just a night lamp? Ok kidding but looks very nice even half finish. What is it?

That there is a high octane hand warmer for the cold ohio winters.

BUT WAIT. THERE'S MORE!

It also has a built in headphone amp for your convenience.
 
Jan 14, 2021 at 3:22 PM Post #1,715 of 2,285

UntilThen

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That there is a high octane hand warmer for the cold ohio winters.

BUT WAIT. THERE'S MORE!

It also has a built in headphone amp for your convenience.

Subscribed !
 
Jan 14, 2021 at 3:31 PM Post #1,716 of 2,285

L0rdGwyn

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Woah can I have that. I'll name it UntilThen. What is this? Speaker amp or headphone amp or just a night lamp? Ok kidding but looks very nice even half finish. What is it?

It's a headphone amp, a hybrid. 841 thoriated tungsten DHT for voltage gain, filament biased, Cree SiC FET for current gain, Sowter 8665 output transformers. I prototyped it a few months ago, it sounds purdy good!

That there is a high octane hand warmer for the cold ohio winters.

BUT WAIT. THERE'S MORE!

It also has a built in headphone amp for your convenience.

Not only that, it is also...a reading lamp! @UntilThen nailed it. Because let's be honest, these tubes are basically light bulbs.

DSCF6225.jpg
 
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Jan 14, 2021 at 3:54 PM Post #1,717 of 2,285

CJG888

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Thoriated tungsten = mildly radioactive ☢️
 
Jan 14, 2021 at 4:19 PM Post #1,718 of 2,285

bcowen

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Jan 14, 2021 at 4:21 PM Post #1,720 of 2,285

bcowen

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Jan 14, 2021 at 4:26 PM Post #1,722 of 2,285

bcowen

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Only a concern if ingested. Although tempting, I do not plan to eat the filaments.

Well since that just killed tonight's dinner plans, you can always order pizza. Most of what we have available for delivery around here resembles food, kind of. :smile:
 
Jan 14, 2021 at 4:42 PM Post #1,723 of 2,285

whirlwind

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Here are the filament and mains transformers before and after shielding. Gives you an idea of what the final look is going to be sans tubes.

IMAG2939-2.jpg IMAG2945-2.jpg

Nice....what sockets are those for the 841's ?
 
Jan 14, 2021 at 4:57 PM Post #1,724 of 2,285

UntilThen

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Not only that, it is also...a reading lamp! @UntilThen nailed it. Because let's be honest, these tubes are basically light bulbs.

I always knew I have the foresight. :wink: Question - is this the Auris Nirvana contender? I.e at least 6 watts into 32 ohms ? How about make it 8? Got to drive those Tannoy Wesminster !
 
Jan 14, 2021 at 5:14 PM Post #1,725 of 2,285

Xcalibur255

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The worst part of winter isn't even the cold anymore it's the insane hurricane force straight winds that are becoming increasingly common now. Then summer rolls around and it hails every 3 days. I don't even complain about blizzards anymore, though being without power for 11 days when winter storm Atlas hit us was memorable......

Why do I live here again.....?
 

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