RL> "just wrong"), you'll get parasitic oscillations.  It started on Tom's
 RL> Traynor when I modded it, but I fixed it by replacing the longer leads 
n
 RL> the preamp with shielded cable, with one end of the shields all tied to
 RL> one ground point.
       Exactly what does parasitic oscillation sound like?
 RL> And you can still hear? ~8-)
       Yeah. :) It's actually not that loud through a single 12 inch Fender 
Special Design blueback speaker. I'm sure that I'll be knocking people over 
with the 4x12, though. :)
 RL> You've got it backwards... money is no object BEFORE you get G.A.S.
       But with true GAS, do you know what you're spending until it's too 
late? My dad-in-law just spent a grand on a Peavey 412MS and two Peavey PA 
cabs and then wondered why. :)
 RL> You checked the plate voltage on the Marshall?
       No, but I assumed that if they got up that high, the higher gain 
Marshalls were probably being hit with that much. This was a JCM 900. I 
couldn't get any output distortion out of it at all. I had to crank the 
output on my processor to get any sweetness out of the amp.
 RL> Oh no... they were in my Carvin when I bought it from Tom.  I liked them
 RL> BETTER than the GTs that replaced them (seemed to have more gain 
efore),
 RL> but they are by far not the best.
        I feel like I might as well just get some NOS tubes. :)
 RL> Fender OEM tubes are relabelled Sovtek.  They probably make the best NEW
 RL> 12AX7 available.  If you want to get into N.O.S., Telefunken is reputed
 RL> to be the grail, if you can find them.  NOS RCA and Sylvanias are good
 RL> and readily available from AES for maybe $5.00 more than a new GT.
       Well, I know I like the sound of the 30 year old RCAs in there. :) I'd 
like to see what unused ones sound like. :)
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