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Re: Juvenile request [message #30407 is a reply to message #30397]

Sat, 05 February 2005 12:02

Damir
Messages: 1005
Registered: May 2009

Illuminati (2nd Degree)

SE 2A3 (6B4G, 6A3) power amp would be rel. easy, IMO - with typical OP (Uak=250V, Ugk=-45V, Ia=60mA, Ra=2k5, Pout=3,5W), we need about 32Vrms "input" from the driver for the full power. With our high-output "Guinevere" line stage, we can comfortably use one - tube driver with active load, say again 5687, or ECC99, E182CC, or something from 6SN7 "family", say 6J5GT single triode.
PS would be little more complicated, say LCLC for B+ of about 300V, motor-run caps again. For the input tube/driver additional LC (or RC stage). With active (DN2540 again) load, about 300V or little less is enough B+ for the above tubes. I can draw the schematic, even breadbord the prototipe, I`m sure that Doug can give some ideas, especially with Hg-rectifiers (I don`t have the experience with those).
All in all, IMO - project easy enough to build, but "good enough" (with good transformers - "Heyboer" again, or...?).
PP 2A3 is another option, maybe better - but little more complicated, especially phase splitter/driver - it`s hard to do it "right" simple. Probably larger/separated B+ for the driver is in the order (400V or so, even larger), and probably 2-stage is requied.
Just some thoughts, we`ll see...

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[Message index]

		Juvenile request By: Wayne Parham on Fri, 04 February 2005 17:30
		Put down the iron, walk away from the Stoetkit and ..... By: colinhester on Fri, 04 February 2005 18:38
		Re: Put down the iron, walk away from the Stoetkit and ..... By: Manualblock on Fri, 04 February 2005 19:09
		Just being a goof.... By: colinhester on Fri, 04 February 2005 20:05
		Re: Just being a goof.... By: Wayne Parham on Sat, 05 February 2005 08:15
		Re: Juvenile request By: Damir on Sat, 05 February 2005 12:02
		Re: Juvenile request By: Manualblock on Sat, 05 February 2005 12:08
		Re: Juvenile request By: Wayne Parham on Sat, 05 February 2005 17:41
		Principle schematic By: Damir on Sun, 06 February 2005 07:18
		Re: Principle schematic By: Wayne Parham on Sun, 06 February 2005 08:11
		Re: Principle schematic By: Damir on Sun, 06 February 2005 09:33
		Re: Principle schematic By: Wayne Parham on Sun, 06 February 2005 09:47
		you don't want to see what I thik is complex... By: PakProtector on Sun, 06 February 2005 05:42
		Re: you don't want to see what I thik is complex... By: cheetah on Sun, 06 February 2005 13:21
		the Poinz... By: PakProtector on Sun, 06 February 2005 16:14
		Oh baby!!! By: colinhester on Sun, 06 February 2005 18:56
		Re: the Poinz... By: cheetah on Sun, 06 February 2005 19:43
		Re: the Poinz... By: PakProtector on Sun, 06 February 2005 20:39
		Re: the Poinz... By: cheetah on Sun, 06 February 2005 20:49
		Re: the Poinz... By: cheetah on Sun, 06 February 2005 20:50
		Re: the Poinz... By: Wayne Parham on Mon, 07 February 2005 09:18
		Re: the Poinz... By: PakProtector on Sun, 06 February 2005 20:58
		Re: the Poinz... By: cheetah on Mon, 07 February 2005 05:06

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