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Old 7th May 2012, 02:46 PM   #191
jane is offline jane  Norway
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Quote:
Originally Posted by nazaroo View Post
For starters, suppose someone reverses a two-prong AC plug at the other end. Now 120 (or 240) volts is on the chassis, and through the few windings of the secondary will be on the speaker wire.
If you have no mains transformer -- but that's not usually the case..

And I would not be too concerned to use an autotransformer in a circlotron configuration like this.
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Old 7th May 2012, 03:07 PM   #192
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by jane View Post
And I would not be too concerned to use an autotransformer in a circlotron configuration like this.
other highly skilled members have told me the same thing
properly wired, grounded, etc etc, and theres not much to worry about
just the same issues like with any other 'normal' moderatly volatged tube
amp

thank you for this support
very appreciated

but, I still like the new schematic, with trafo wired like normal tube OPT especiall now I hear the lower impedance works even better
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Old 7th May 2012, 03:10 PM   #193
tinitus is offline tinitus  Europe
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I think we can 'safely' leave the safety issues

and maybe ask nazaroo to cool it a bit more
thanks

100% safe tube amps ?
I guess not
no reason to expect this to be any better than others

I hope we can get on with it now, please
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Old 7th May 2012, 03:15 PM   #194
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by revintage View Post
So once again, check the Williamson driver:
yes, I see it now
looks similar
but different tube, I guess
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Old 7th May 2012, 03:26 PM   #195
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by banat View Post
....what do you think about two separate Ecc99 cathode...
2x ecc99 per side

hmm, reminded me of this curcuit
we have looked at it before
I dont know what it is, how it works, or why
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Old 7th May 2012, 03:40 PM   #196
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by banat View Post
...what do you think about two separate Ecc99 cathode....
or double penthode driver maybe EL84

maybe a grid connection could be NFB
I have no idea tho

but with matching etc...money, money
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Old 7th May 2012, 04:05 PM   #197
banat is offline banat  Serbia
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tinitus
I was think to be something simple like this :

Still I need others member opinion and sugestion related to this schematic !!!

BTW , this yours tube amp project missing something very important !!!
The project Name !!!
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Old 7th May 2012, 04:21 PM   #198
jane is offline jane  Norway
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Here is my cirlotron circuit from some year ago: 6SL7 input, ECC99 driver and 6P45S final into a 600R OPT.
Click the image to open in full size.
(I have to redraw that non-figurative art into some sort of a proper schematic..)

Think I got 50W+ out of it without questions. It's one of my frequently used amplifiers.

Click the image to open in full size.
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Last edited by jane; 7th May 2012 at 04:29 PM. Reason: Picture included
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Old 7th May 2012, 04:42 PM   #199
banat is offline banat  Serbia
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Jane

I like the simple way how you limited max.G2 disipation of 6p45c G2 with zeners !
BTW , it is 6p45c G3`s tied to cathodes ?

Best Regards !
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Old 7th May 2012, 08:13 PM   #200
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by banat View Post
Jane

I like the simple way how you limited max.G2 disipation of 6p45c G2 with zeners !
and connected to opposite tube
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