Triode/Pentode switch?

[big_black]

I have one on my Ampeg amp. What is it for?

 

[aleclee]

Re: Triode/Pentode switch?

It changes the wiring of the circuitry around the power tubes, affecting tone, feel, and output power (triode mode has less power).

 

[the guy who invented fire]

Re: Triode/Pentode switch?

I have one on my Ampeg amp. What is it for?

The power tubes in your amp run 5 elements (pentode) the switch shorts 2 of them to ground making the tube run like a triode...this is supposed to give you more crunch at a lower volume...I do not like the tone of an amp that has this feature in use...I always leave it in pentode mode.

 

[big_black]

Re: Triode/Pentode switch?

Yeah, I deffinately like the pentode mode better. I haven't played it in a few months (needs new tubes), but the pentode mode seems to have more mirange crunch.

 

[aleclee]

Re: Triode/Pentode switch?

I do think triode mode adds character to the cleans.

 

[big_black]

Re: Triode/Pentode switch?

Thanks for the info guys.

 

[TwilightOdyssey]

Re: Triode/Pentode switch?

My hi fi power amps (tube monoblocks) can run in triode or pentode, and pentode just sounds way better to my ears. More bottom end, greater dynamic range, and less strain.

 

[big_black]

Re: Triode/Pentode switch?

My hi fi power amps (tube monoblocks) can run in triode or pentode, and pentode just sounds way better to my ears. More bottom end, greater dynamic range, and less strain.

That's what my ears tell me too.

 

[Simon_F]

Re: Triode/Pentode switch?

My hi fi power amps (tube monoblocks) can run in triode or pentode, and pentode just sounds way better to my ears. More bottom end, greater dynamic range, and less strain.

My 2553 Jubilee has triode and pentode modes too, and I hear it the same way. Don't like the triode mode.

 

[That90'sGuy]

Re: Triode/Pentode switch?

Doesn't triode mode cut down the power in half?

A lot of people I know like 100w versions of an amp more than 50w ones because 100w sounds more massive so perhaps more wattage equals "bigger".

 

[TwilightOdyssey]

Re: Triode/Pentode switch?

Doesn't triode mode cut down the power in half?
A lot of people I know like 100w versions of an amp more than 50w ones because 100w sounds more massive so perhaps more wattage equals "bigger".

Yes, triode cuts down the power. My amps are 45W in Pentode, and 25W in Triode.

 

[That90'sGuy]

Re: Triode/Pentode switch?

Thanks for the clarification