ampage
Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  

Common Screen Grid Resistor

1/25/2000 1:20 PM
T.B.
Common Screen Grid Resistor
In my YBA-1 Bassmaster amp, there is one 470 ohm 10 watt resistor supplying both screen grids. (two EL-34 tubes)  
Any comments on this setup? Anything to making the current between the two tubes more equal, etc. by having a common resistor?  
 
I plan to take the advice I've read on this board and replace the 470 ohm with 1K (one 5 watt to each tube). But for the sake of conversation, what would be the problem of having only one 1k 10 watt resistor supplying both tubes? Say in the event one tube goes bad?  
 
Thanks - T.B.

 
Replies:
SpeedRacer Some of the old Marshall 50W used t... -- 1/25/2000 5:33 PM
Rich I am no expert but I think the 470 ... -- 1/25/2000 6:15 PM