[R-390] Tube Substitutes

[Rick Brashear]

Thanks Andy.  You're right, it's not a direct sub and doesn't work well, 
but it did get me up and running until my tubes come in.  I found the 
6BJ6 is a preferred sub for the 6BH6, but due to the characteristics you 
mentioned the opposite is not true.  Even though it does mess with the 
AGC, it works better than the almost dead 6BJ6 I pulled.  :-)

Thanks for the insight.  I seem to learn something new everyday when I 
am playing with this 390.  I really appreciate you and the entire list 
for the patience and assistance.

73,
Rick/K5IZ

James A. (Andy) Moorer wrote:

> You can't make that substitution.
> The 6BH6 is a SHARP cutoff pentode. At about -4.5 volts...