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gabrielbecheanu 25th June 2010 10:53 PM

G-807=807 SE or PP?
I would like to make an amplifier with this tube. Any idea witch configuration will be better? SE or PP
Any schematics for SE or PP configuration, I would like something tested, also OPT schematics will be nice.

aardvarkash10 26th June 2010 12:12 AM

better for what? What expertise and experience do you have in building electronics stuff? What are you wanting the amp for eg room size, the specification of your speakers etc? These all help, since you have asked a question that can be answered wit ha very simple but not too powerful answer (RH807 is SE at around 10WPC) or a more complex but more powerful answer (Miles or Shoog will help here at around 25WPC) or a VERY powerful and complex build (read: expensive) outputting up to 80WPC...

Wavebourn 26th June 2010 12:31 AM

Of course, PP is better for 807 tube, if to speak of a linear amp! You may find plate curves available everywhere and check for yourself. In SE it needs deep feedback to work satisfactory.

gabrielbecheanu 26th June 2010 07:42 AM

When I made my first amplifier (SE with 6C33C) the most important was the sound quality, not the power or consumption or how big will be. So when I want to chose a tube for an amplifier I want to know for what is more suitable? SE or PP
aardvarkash10 read from post 133 my expertise. It was my first tube amp.
Wavebourn PP in did, most of the schematic I have are PP, now I must decide witch one to make it. I will try to collect more schematics I will stdy them and try to decede.

aardvarkash10 26th June 2010 07:52 AM

1 Attachment(s)
ok, well the 807 is not the most naturally linear of tubes as wavebourn notes. This kinda steers you toward pp. Of course you still have a HUGE range of options in that field including whether to triode, u/l or pentode the tube and the gamut of A, A1, AB1, AB2 decisions...

Check out Miles' Vixen design - the rest of the linked thread is well worth reading too.

I've attached the RH807 as well for an Se option. Wavebourn will no doubt chip in about the triode driver here...

gabrielbecheanu 26th June 2010 08:09 AM

9 Attachment(s)
Thanks aardvarkash10
I hope that this thread to become more interesting for all the guys who wants to make an amplifier with this tube.
These are the schematic that I have

aardvarkash10 26th June 2010 08:10 AM

yeah - sorry posted the wrong attachment for the RH 807 - link to the correct one is here

gabrielbecheanu 18th July 2010 07:33 PM

I would like to hear a few words about an 807 PP in AB class if someone made one.

Miles Prower 18th July 2010 11:57 PM


Ask and ye shall receive: Clicky.

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