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In Reply to: Don't forget about the air gap posted by Russ57 on September 29, 2004 at 12:32:19:
..to voice the K-Horn. Brooks 12A, 2A3 in pushpull. He had about six-eight watts to work with.Since the forte's a little less efficient, a pair of 300s in pse or PP would be just about perfect. Should be what... 12-18 watts? Enough to play herr Beethoven *LOUD*. =o)
I don't feel confident enough yet to tackle something truly Teslarian like 845s and such.. kilovolt plates.. mmm.
I'm merely exploring different front-end topologies. I may build a PP 300 for myself. Or PSE, or tranny-coupled.. Triode back end, Pentode back end.. so many directions to go in. My goal is to learn. If I learn enough, I may even join this madhouse business called audio. ;o)
Follow Ups:
You could also try a PP 845 running ~750 volts with a 6k6 output. There are a few trix to both simplify and improve. Perhaps use a pair of DHTetrode 1619 to drive it. All sorts of things to do if you only need a few tens of Watts. Drive GM70's with 10's perhaps?
The E-Linear connection would also simplify your power supply. 10Y would also be a neat one to try. But if you're going to the trouble of DH 10 volt filaments, try a pair of 813's U-L, into the same 6k6 with E-Linear 1619's driving them. CCS-ed 5687 diff amp as the first stage...
live long and prosper,
Douglas
Beware the man who behaves deceitfully towards others, for there is nothing else to save you from his deceiving you
You probably live in midtown Manhattan, walk to work, and use your SUV to drive to the supermarket in Queens on the weekend.
Nah.. for horns I like mod to low power. 20 watts or less, depending on the horn.Still... just for giggles, it'd be a blast, ne? 1kv plates..yum! Nurse, the crash cart if you please..
I don't own an SUV, it is a Cummins Powered UV, and I would rather buy a SE amp retail than live in NYC.I am currently living quite comfortably on 10 or so WPC. The only guy I know with PP 845's up and running, has speakers at least 6 dB more sensitive 1W-1m than mine, and his amps run them full booogie...
you did set the similie up quite nicely.
regards,
Douglas
!
Beware the man who behaves deceitfully towards others, for there is nothing else to save you from his deceiving you
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