6U10, 6AC10, 6D10, 6AV11 Tubes

[zozoe]

Greetings,, Are the above titled tubes, & others like them, interchangeable in the precise sense the 12**7's are swappable with a resulting change in gain? Or is there too much 'other' stuff going on in those compactrons? In particular, My Ampeg
AC-12 calls for a 6U10, as do many, many Ampegs, and I wanted to know if the other Compactrons mentioned are drop in substitutes that may offer different, or more, amounts of gain?
Many Thnx, Kenny ॐ💃🪕

 

[vinylkid58]

6AK10 any good to you. All three triode sections are the same, mu=53, so no 12AU7 like section. Same pinout as 6U10.

https://frank.pocnet.net/sheets/123/6/6AK10.pdf

jeff

 

[stocktrader200]

That 6AK10 Would make a good phono preamp at 1 per channel

 

[pblix]

If you're swapping 12A*7s without any other changes to the amp, you're doing it wrong. And no, if the internals are different, you need the proper circuit evaluation/design to figure out if there is a compromise where two different pin compatible tubes can be used.

 

[Sorento]

There is no 'other' stuff going on in those compactrons.

6U10 equivalent to 2x 1/2 of 12AU7 + 1x 1/2 of 12AX7​

6AC10 and 6D10 both equivalent to 3x 1/2 of 12AT7​

6AV11 equivalent to 3x 12AU7​

Except for heater voltage which is 6.3V only in these compactrons.
However 8AC10 and 12AC10 etc etc etc also exist.

 

[Tom Bavis]

6U10 is probably the commonest of those triple triodes. $5.00 for NOS at findatube.com. Whether any of the others would "work" depends on the circuit - won't be optimum. If this is used as phase inverter, I doubt any of the others will work well.