I have an odd case that I could not understand at all (still learning)
It's '69 Ampeg B15NF (fixed bias) 2x6L6GC + 5AR4.
Now - amp is warming up, and when I hit standby I see on my meter that bias is *just starting* to raise up from 0 to the +/- 40mA per tube - it takes around 30 seconds. On my other Ampegs from that era, after warmup, when I hit standby I have that reading after 1-2 secs. So, what I'm trying to tell, it looks like amp behaves like its' super cold and not warmed up - the same like you would be hit power and standby at the same time from the beginning. I have recapped it and also re-did bias section (new cap, new resistor). It plays great overall.
What could be the reason of that behavior?
It's '69 Ampeg B15NF (fixed bias) 2x6L6GC + 5AR4.
Now - amp is warming up, and when I hit standby I see on my meter that bias is *just starting* to raise up from 0 to the +/- 40mA per tube - it takes around 30 seconds. On my other Ampegs from that era, after warmup, when I hit standby I have that reading after 1-2 secs. So, what I'm trying to tell, it looks like amp behaves like its' super cold and not warmed up - the same like you would be hit power and standby at the same time from the beginning. I have recapped it and also re-did bias section (new cap, new resistor). It plays great overall.
What could be the reason of that behavior?
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