Technik > Tech-Talk Amps

Less gain in valve jr mods

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larsthestrat:
Hi,

I did all the mods from the TT -site (valve jr.). I really like the sound of this amp now, but I would like less gain coming from it (more headroom). Are there any mods I can do to achieve this
(different pre-amp tube, changing resistors, etc.).

grt. lars

mc_guitar:
Hello,

The easiest way would be to use a different preamptube. Instead of the normally used 12AX7/ECC83 try a 5751 which would have about 70% of the gain of a 12AX7 or try even a 12AT7 for even less gain but some more compression.

Cheers Micha

larsthestrat:
hi,

thanks!

would this make the amp less loud or will it decrease the gain. I'm looking for the last thing, decreasing the gain but the amp should give the same amount of (clean volume).
I want to use it on stage, but with less gain....

grt. lars

Caisa:
I would like to recommend you a 12AT7.

The  GE 5751 in V1 of my Valve Junior sounds great but you'll not notice considerably less gain than with a JJ 12AX7.

Bye
Stephan

EDIT:

To further increase the clean headroom you might try a NFB mod, discussed here. Try efficient speaker too!

larsthestrat:
hi,

and will the amp stay as loud as with the 12ax7?

thanks!

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