r/diytubes

I see vali 3 can run at 100v and comes with "6N3P" tube and can work with "6N3P, 2C51, 5670, or 396A"

buf also seems to run at 100v and comes with "6N1P" tube and can work with "6922, 6BZ7, 6DJ8".

So what I am seeing comparing the manuals is that they are very similar devices except for an extra $50 the vali 3 comes with volume control and a headphone out and they take completely different kinds of tubes.

Which one of these would be better in a signal chain that goes

turntable phono line -> schiit skoll f -> [buf or vali 3] -> powered monitor speakers

Thanks all

I picked up a transformer with basically 4:1 step up. Surplus place said it was designed for a 500v primary. The manufacturer won't release the specs as it's "propreitary to the OEM." I figure with a nominal 117v primary I'll get around 500v unloaded. Add a full wave bridge and I'm around 700 unloaded. The only filtering I can see would be a choke? for something like 807s 811As that can handle that high a B+, is a single resistor-choke acceptable somewhere between 7-14H?

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I recently came into possession of a few 6476A Dekatrons and would like to find the sockets for them. The data sheet says they are a "B12E" base. If anyone has any suggestions where to find them it would be greatly appreciated.

I ordered a Cornet 3 kit. So I was poking around in the tube stash and found a Radtel 12AU7A. Upon opening the box, I found a tube marked NUCLEAR MADE IN USA 12AU7A. It has another, more typical 12AU7A mark on the other side.

Radtel was one of those outfits that bought tubes and either washed off the markings and re-branded them or just shoved them in their own box. The only other reference to "nuclear" and 12AU7 brings up some made by Phillips. They had an atomic symbol and of course were not made in the USA.

Anybody know about this tube? For damn sure I am going to use it in the Cornet 3. I have some RCA and some 12AU7WA but this is just too cool not to use.

https://preview.redd.it/orkzcjwo17yg1.jpg?width=750&format=pjpg&auto=webp&s=7161db11621baa1b6d953ff6e0f68e2c1c26a4af

I’m attempting this mod to my Crate VC50 combo, and I’m having issues with it.

My clipper is wired correctly, but attaching it to pins 2/7, 2/6, 6/7 on V2 does nothing until I turn the gain up, at which a gnarly hum occurs that oscillates higher or lower as the gain is turned up.

Any help with where to properly fit this mod would be appreciated.

https://www.thetubestore.com/lib/thetubestore/schematics/Crate/Crate-VC50-Schematic.pdf?srsltid=AfmBOopdRJiov8LBI3m3dJqlPDPlxcIXWknM6vvHSn-JvYrKpijwiQhO