UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

john.north · 29th Jul 2018, 5:34 pm

Hello,
40mA is still too much. You may have a leaky electrolytic.
Can the quiescent current be set correctly at the link or is it too high?
If not then the likely candidates are the output pair.
Can the midpoint be set correctly with rv 3? If not then t4 is faulty.
AC 128 is ok for t3.
John.
Ps I have two knobs if you want them.

29th Jul 2018, 5:34 pm	#11
john.north Pentode Join Date: Jan 2013 Location: Immingham, North East Lincolnshire, UK. Posts: 174	Re: Hacker Herald RP37A repair Hello, 40mA is still too much. You may have a leaky electrolytic. Can the quiescent current be set correctly at the link or is it too high? If not then the likely candidates are the output pair. Can the midpoint be set correctly with rv 3? If not then t4 is faulty. AC 128 is ok for t3. John. Ps I have two knobs if you want them. Last edited by john.north; 29th Jul 2018 at 5:35 pm. Reason: Control knobs