Tube Amp Archive

so...






...who else is feeling rather inferior now?




nice stuff

Have you guys looked at the Fuchs Lucky 7?

I don't know the Lucky 7 schem, but maybe V1 pin6 voltage is a bit in the high side, don't know for sure. It seems you only meassured Plate voltages. Did you check cathode and grid voltages? Anyway check the solderings and wires going from pin 6 to plate resistor and coupling cap just to be sure th...

I'll give them a go...

In the meantime i have spoken to Andy and he has suggested a few things to try. Fuchs really like to see there customers happy! Its great... if only every amp builder was this friendly and helpful.

Hi guys, thanks for your help thus far... here is was my DMM has revealed after a little poking around... on the first 12ax7 im getting about 184 or so volts on pin 1, on pin 6 however im getting 205volts. on pin 1 of the second 12ax7 im getting about 195 volts. The se cond half of this valve isn't ...

I spose a clip will better show what im talking about... here is a quite and nasty clip I just recorded... you can hear how the wheels fall off as I move down the next. This is probably the best i've gotten it to sound... It usually has a weird wobbling to it which you can clearly see in the recorde...

Hi there! I hope you don't mind me asking this question here, but I thought if anyone could help me it would be a wise bunch of TW clone builders. My lucky 7 is suffering from low end oscillations. Here is what i've noticed/done: - This only happens very the amp is pushed into breakup so it is volum...