[JN] buzz goes away when volume is mid way.

ben bfranchuk at jetnet.ab.ca
Wed Apr 17 12:17:22 CDT 2019


On 4/17/2019 11:04 AM, Paul Seymour via Sound wrote:
> 
> Hi Jo's
> 
> can I ask for your wisdom, I am stumped on this one.
> 
> I have a pre amp, similar to JELabs preamp with the 76 tube,
> except I have all 6SN7's.
> 
> I have this BUZZ in right channel only.
> I switched inputs and output's and always this channel
> of the pre amp has the buzz.
> 
> *Strangely if I turn up the volume pot on the pre amp *
> *to mid way the buzz vanishes. (* Pot is on the input and
> I've swapped inputs as said and it's the same result so it's
> not the phono stage prior. )
> 
> *If the vol pot goes right up the buzz comes back.*
> *Only in the middle does the buzz disappear. *
> 
> This bizarre symptom must point to something, but what?
> 
> thanks,
> Paul.

Bad solder connection to ground perhaps?
Ben.




More information about the Sound mailing list