[Amps] NCL 2000

[Dennis12Amplify at aol.com]

"hi gang" i am having a problem with my national ncl 2000 flying out of gear.
i just installed two new matched burle tubes.
if i get the least bit long winded it flies out.i have tunes it every way
imaginable.


 Is the fan working?

 Sounds like tubes overheating to me.

 Also keep an eye on your grid currents and grid and screen voltages to see 
if they are holding constant or if they are dropping when you get 'long 
winded'

 Regards,

Dennis O.