sunn coliseum pa; what value is this restistor?

[ampfab]

what value is the resistor on the cathode of the triode before the tone stack?
is it 4.7k or 47k. i can't find a totally clear schematic.
A friend of mine says that it has to be a 47k, kinda looks like the schematic says 4.7k.
what do you guys think?

[sluckey]

The schematic does call it a 4.7K. And the voltage on the cathode is consistent with a 4.7K. If that resistor were 47K there would be about 60V on the cathode.

[ampfab]

Ahh.. Good point about the cathode voltage.

[JMFahey]

sluckey is right, voltage confirms the educated guess.

Now you understand why Europeans use the "letter" as decimal point.

You can easily lose a tiny dot (or worse, gain one) when scanning, photocopying, etc. but it's harder to miss values written as:

4k7 (4.7k)

22n (0.022uF)

2n2 (0.0022uF or 2200pF)

and so on.

[ampfab]

Thanks for everyone's help. I just finished putting together an amp based on the sunn coliseum pa using a fender type power amp using 6l6 tubes. Sounds very cool!