23-04-2012, 09:06 PM
So much for my resolve to leave this alone. 
I tested the rest of the resistors and found a few were high. They wouldn't have seemed worth changing on a valve set but at tuppence each there seemed no point leaving them and it's all practise working on PCBs.
This seemed to improve the motor-boating, though the quiescent still needs to be set to 12mA and it won't work on the batteries.
I haven't changed the rest of the original electrolytics but have had them off and they show no measurable leakage and less than an ohm ESR.
Small steps but in the right direction.
- Joe
I tested the rest of the resistors and found a few were high. They wouldn't have seemed worth changing on a valve set but at tuppence each there seemed no point leaving them and it's all practise working on PCBs.
This seemed to improve the motor-boating, though the quiescent still needs to be set to 12mA and it won't work on the batteries.
I haven't changed the rest of the original electrolytics but have had them off and they show no measurable leakage and less than an ohm ESR.
Small steps but in the right direction.
- Joe
