New amp JM-Like 6v6... need help!!!

[bill89]

I think that one changes could be a cathode bias or mixed bias instead of fixed bias...
usually small amp with low voltage use this.
But which values for screen and control grids and for plate?!

HEEEEELP!

Other changes on Power Supplies...

[10thTx]

I'll offer this for consideration for your B+ supply rail. And this is with a cathode biased 5881 amp.

I use a Hammond PT 275-0-275 with GZ34 rectifier (but you could use solid state rectification if you wanted)

I use a Hammond 1620 OT. I am happy with the bass response on this.

Amp is probably 17 watts or so?

with respect, 10thtx

[bill89]

thanks

The amp is 15W...
I use PT and OT of a Ibanez TSA15H ...

I could use this PA for my new amp!

I don't know what is 150pF cap on the pin1 of the PI... it can cut high frequence?!

[bill89]

Here some specifics of my transformers...
OT
15W
6200ohm

PT
250V Plate voltage
I don' know intensity current!

and here schematics with 275 0 275 PT ... with specifics near to my PT

[10thTx]

I don't know what is 150pF cap on the pin1 of the PI... it can cut high frequence?!

enhance cap

http://www.el34world.com/Forum/index.php?topic=12723.0

With respect, 10thtx

[bill89]

Thanks 10thtx!!!

I'll try to use this! =)

[M Fowler]

Now you've added the OD loop which JM amp does not have.

Could be a sweet little amp either way.

[bill89]

No, i would like to use only PA stage of this diagram with preamp and PI of JM...

[bill89]

Could you tell me some circuit simulator for mac?!
I would like to test some configuration of this amp!

Thanks!!!

[bill89]

Ok, I hope that is right!

the impedance of my OT is 7500Ohm
Plate voltage 320V

Load lines in attachment!!!

Power in watt 11,445W

Bias of the 6V6 = 28mA 80% of the max
Control grid -18V
Screen grid voltage 312V
screen grid dropper 1K
screen grid stopper 470R 2W
Cathode bias resistor 330R 2W or 270R 2W and 100k trimmer
Cathode capacitor 47uF

there are errors!? what can I change?

[bill89]

I think that this PS would be OK.
What are you think?!

[bill89]

Up please!!!