I'm glad that what just the Zeners. And how your SOHAII sound?
post #601 of 1686
2/8/09 at 1:10pm
Please, help. My friend has some questions regarding the SOHA II he is building now. He do not know English so I would ask
Current trough tubes (I think you name it "bias") is set to 2 mA. Both TB+L and TB+R are 60 V. There is big spread between TPL (44V) and TPR (30V). And the difference between TPR and TB+R is 30V, what is much higher than 19V recommended. Section "Setting the Ttail current for the input stage" recommends to see Troubleshooting, which does not help.
Amp works fine anyway, both measurements and listening tests are OK.
What should he do, if any?
Swap the tubes, then measure again. See if the differences switch channels. If they do, then it's a tube problem. If it doesn't, probably not the tube.
I have a problem related to my SOHA II
It sounds so good with my 650s, I don't like my work rig anymore (580s and MHSS)
Looks like I am gonna build another SOHA II for work