Technik > Tech-Talk Amps

Less gain in valve jr mods

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larsthestrat:
okay, that's a good idea. I will check that one out. Do you mean bij Ra1 the resistor that was essentially 1M (pull down resistor)?
regards, lars

mc_guitar:
Hello,

No Ra1 means the AnodeLoadresistor of the V1A system. Change it from 100kOhms to 68kOhms, which will get less gain out of V1A. Check the schematic Dirk has in the ValveJunior Mod section.

Cheers Michael

larsthestrat:
hi,

thanks! so I need to change both R3 and R4, or just one of them?
grt. lars

mc_guitar:
I would start by changing R3, then listen to the amp and decide whether it is clean enough.
Maybe clip C4 off, or as Dirk suggested make C4 switchable.

Cheers Micha

larsthestrat:
I will do that and let you know!

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