Brown Princeton Trem making thumping sound

[BobbyS]

Hello,


I am new here posting, but have gotten great info from lurking. I am having an issue with a Brown Princeton 6G2 that I built up. The amp is working great, except when I increase the trem intensity I get a thumping sound that is the same as the speed of the trem. If anyone can help I would greatly appreciate it.

Thanks
BobbyS

[sluckey]

A diode across the Intensity pot will probably help.

[Tom_Hull]

hi bobbyS

first post ,welcome.

my amp developed that thumping on the intensity pot at high volumes.

it did not have it before.working on that thumping  as well .

can the power grid resistors showing on the schematic be the problem .??
i do believe there are not matched ,.????same value but did not read the same before installing them ..


tom

[Ed_Chambley]

Welcome Bobby.  Great place with some very knowledgable folks.

[BobbyS]

Thanks everyone.

I will give the diode a try sluckey.