preamp tubes change

[mongiak]

I´ll like to know if I can change the preamp tubes of my amp without doing any chage in the schematic. The amp uses the ecc83 and I gould like to try the ecc82.

thanks a lot

 

[SY]

These two tubes are very, very different.

 

[leadbelly]

This is an excellent and easy swap as long as you never plan to turn on the preamp again. A more challenging swap to octal tubes will require a mallet and duct tape.

Or you could play it safe at look for another substitution here:

http://tdsl.duncanamps.com/show.php?des=ECC83

 

[mongiak]

I´ve been reading arround and many peoples say that the change can be done, in a expert page it´s said that the change can be done but that it doesn´t allays work.

Substitutions:
* means appropriate for parallel filament circuits
# means may not work in all circuits
Preamp and driver tube substitutions:

12AX7 (high gain dual triodes with pinout 9A)
12AD7* 12DT7 7729
12AU7# 5751* B339
12AU7A# 5751WA* B759
12AX7 6057 CV4004
12AX7A 6681 E83CC
12AX7WA 6L13 ECC803
12BZ7* 7025 ECC83
12DF7 7025A M8137
12DM7* 7494