Belles 20A Tweaks--Tubes

Thank you kindly for your reply. I currently have some 1950's Raytheon Black Plates,,I'm gonna take your advice and try the BDR cones and Mullards.I appreciate the time you took to respond--thanks---George

I had one. This is a darkish sounding preamp so the popular NOS tubes really made the sound too thick & closed in. RCA black plates would be an example of the tube to avoid. You should try some new production tubes or Siemens, Mazda if you want NOS. You need to dampen the vibration with elastomers and adding mass. Forget about solid cones and other gimmicks.

Thanks for the reply and advice.Based upon your sugestions,I jusr rolled some JJ goldpin Ecc802's in and so far I am very pleased with the outcome. The pre seems more musical with a tremedous soundstage.Lively, but not bright,it is as if she "woke up".Souns very detailed but still just a tad laid back,which is exactly what I was looking for.Thanks for taking the time to respond.

Any more recent thoughts ?