I agree with the microphonic tube diagnosis. In my system, tube dampers have not worked to correct ringing microphonic tubes.
Tube Amp "Ringing"
I have a Jolida SJ-502A tube intergrated amp and tonight I noticed a "ringing" sound coming from the amp. Didn't notice it when the music is playing, but when I changed my CDs and was close to the amp, noticed the ringing. Was curious on what it could be and how I can solve this problem. btw, I'm a "tube newbie", and help and suggestions would be appreciated. Thanks.
Showing 3 responses by tvad
The best suggestion for low noise tubes are any brand sold by a highly reputable tube seller. You can be assured that any tube sold by Andy at VTS will be low noise, regardless of brand or model. BTW, I would first look at your NOS Black plates as the possible source of the microphonic tube. As Newbee mentioned, just gently tap each tube with a pencil eraser. If you tap a microphonic tube, it will obvious. |
Vintage Tube Services contact info. The RCAs are the most likely culprit because despite them being newer to you, they are in fact the older tubes. Brand spanking "new" NOS tubes can be microphonic. It's an easy matter to check them all, right? |