Low volume of bright channel on 5E3

[mayburyds]

Hi,


Need some help again!


5E3 was fine yesterday, today there is hardly any volume on bright channel, normal channel seems to be a bit louder but that could be my imagination.


Tried new valves in pre amp section, checked that the input jacks on bolted down tight and re-flowed solder joints for the bright channel but no joy.


Any ideas on where to look next would be welcomed!


Cheers.

[Ed_Chambley]

Volume pot?  There are 2 and I have seen it when you have one turned up actually lower the volume on the one you are plugged into.

[mayburyds]

Hi,


Thanks for the reply.


I understand the pots interact with each other, but if I have both volume pots on 3 I just about get sound from the bright channel and bordering on break up on the normal channel.


Cheers.

[PRR]

> fine yesterday, today there is hardly any

Such trouble is *usually* a bad connection. Works one day, not the next.

Yes, the 5E3's interactions can also mean a large change of response from "small" change of knob settings. I assume you fiddled enough to know.

Bad tube, bad pot etc.

But on a new build which DID work, I would be looking at the joints. Sometimes they just barely work, but that is good enough, until they don't work at all.

[mayburyds]

OK, thanks, I'll go over the joints again and double check.

Cheers.

[mayburyds]

Checked the voltage on pin 6 on v1 and it was very high. Reflowed the solder on the shared bias connection on pin 8 and that fixed the problem.

Many thanks for your help.

[Willabe]

Good job.