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In Reply to: RE: I get confused posted by sony6060 on November 06, 2014 at 14:55:06
But pp that should be 18k to be the equivalent impedance to your ppp amps, no?
I have a pair of pp 6v6 amps with 10k opt's, I've been meaning to try the MM circuit so sounds like I should do it.
Dave
Follow Ups:
In simple terms paralleling tubes drops the impedance in half of a single tube.
Not only does it affect you output transformer choice, but it also allows you to get a away with a very simple driver stage.
dave
Right, sorry I'm confused. One tube SE - 5k. Two tubes PP - 10k. Four tubes PPP - 5k. PPP with 9k is the equivalent of PP at 18k, no? Did I misunderstand?
Dave
Correct. 9K PP is rather high. 6K-7K for PPP 6V6 triode would be best with a good balance of power & dampening factor.
~!
The Mind has No Firewall~ U.S. Army War College.
Cool, makes sense, thanks.
Dave
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