13-09-2019, 12:43 PM
Thanks Terry.
The sun is shining so its boat painting today.
Did replace all the paper capacitors, all that are left are the Philips tubular ceramics which are usually reliable. But they will have to be checked.
There are many riveted earthing tags, already thought of that one, its a favourite for this problem. I will go around bridging them all.
The electrolytics are all new and there are low value poly caps across the HT rails now.
The mixer/frequency changer and the IF amp valves share a screen resistor and capacitor, I'll try splitting them if all else fails.
Had the same problems with a couple of Bush chassis with EF39s before and the judicious addition of a grid stopper often works. Its not common with EF41s.
There is no sign of the twiddler, thank fully.
The sun is shining so its boat painting today.
Did replace all the paper capacitors, all that are left are the Philips tubular ceramics which are usually reliable. But they will have to be checked.
There are many riveted earthing tags, already thought of that one, its a favourite for this problem. I will go around bridging them all.
The electrolytics are all new and there are low value poly caps across the HT rails now.
The mixer/frequency changer and the IF amp valves share a screen resistor and capacitor, I'll try splitting them if all else fails.
Had the same problems with a couple of Bush chassis with EF39s before and the judicious addition of a grid stopper often works. Its not common with EF41s.
There is no sign of the twiddler, thank fully.
Boater Sam.
