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Old 19th September 2005, 03:29 AM   #21
amperex is offline amperex  United States
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Default Talking about good sound & design.....

I built a pair of PP45 amps with a direct coupling pre to phase splitter and used a shunt regulated B+ power supply. The regulated B+ without having to be processed thru a series tube or transistor should be superior. The amp (monolocks) outperform a few well regarded 45 SET designs per new owner. With 100dB efficient speakers, it is not the higher power making the difference.
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Old 19th September 2005, 03:32 AM   #22
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Default Re: Talking about good sound & design.....

Quote:
Originally posted by amperex
and used a shunt regulated B+ power supply. The regulated B+ without having to be processed thru a series tube or transistor should be superior.
Agreed. Especially with a well designed CCS before the shuntreg.
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Old 19th September 2005, 05:51 AM   #23
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Thanks for the datasheet. Iíll over this week have have a trawl through all the many posts at Audio Asylum on this tube.
Though I didnít know the volts are that high.

~ Space sure can cramp a diyer audio person, I suffer that too ~


Still not one 300B SE circuit good for dynamics/ rock (used with appropriate speakers)???

KYW? audiousername? Frank? analog sa? SY?


Cheers
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Old 19th September 2005, 06:25 AM   #24
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Tubelab

I like your tip of industrial control transformers. I now need to decide GM 70 (845/ 211??) and watts.

Cheers
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Old 19th September 2005, 10:33 PM   #25
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rick57: see also this post
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Old 4th October 2012, 09:19 AM   #26
palmas is offline palmas  Portugal
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cheapest if you go for PP (or PPP) as the trannies are way cheapper than propr SE's.

you could go for GM70PP (big power) GU50 (in parallel can get about any power you'd like, specially in pentode).
I'd say first decide budget, then check trannies in good price, then decide.

I personally use a GM70 SE and get 45W and a lot of slamm. Never run out of power
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