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

[bill89]

Hi,
Someone help me with my new project?!
I'm no expert but think that this diagram could be corrected...
I don't know anything about power supplies...
I have a 15W OT and my PT have a max tension of 250V AC and 32V AC for bias!

Thanks

[Structo]

what are your plate voltages?

What power tubes are you running?

[bill89]

I use 6v6 EHX
My plate voltage is 320V

Thanks!

[rock_mumbles]

10k 6V6 cathode resistors ???

Shouldn't those be 1 ohm or 10 ohm for fixed bias

or maybe 100 to 150 ohm for a combined cathode/fixed bias

[bill89]

I'm sorry, 1ohm!

I would like that 6v6PA sound like 6l6... more or less...
there is any configuration?!

[ToneMerc]

I would like that 6v6PA sound like 6l6... more or less...
there is any configuration?!

Plain truth here....a tiny 15W output transformer and 320V on the plates of a pair 6V6's is not going to remotely sound or feel like a 100W quad 6L6 amp.


TM

[bill89]

OkOk...
but I think that could sound good!

can this configuration sound good?! what upgrade?!

[ToneMerc]

can this configuration sound good?! what upgrade?!

Of course that configuration could sound good, it's just a Dumble clean only low plate preamp into a standard Dumble PI.

What uprgade you ask; change the power transformer to something that would provide 470-490 volts on the plates and run a pair of 6L6's with a appropriate output transformer.

TM

[bill89]

this power supply?! it's right?!

[bill89]

Ok, but It is my first amp and I would like to spend a little...
I don't know the effect of the resistor of the grid of 6v6...
How should I calculate the value?!

[Structo]

Why is that 220K resistor across the supply?

Sometimes it is best to follow convention that try to re-invent the wheel.

What is your goal for this amp?

Please put your location in your profile so we can help you better with suggestions.

[John_P_WI]

Why is that 220K resistor across the supply?

Bleeder, and it will only work for the rest of the preamp if the standby switch is "closed".

[bill89]

I would like to learn and I want to build a good amp...

to discharge cap filter when the amp is in standby...

[ToneMerc]

I would like to learn and I want to build a good amp...

to discharge cap filter when the amp is in standby...

As far as learning you are off to good start, as configured it work. I would make a few changes though.

TM

[bill89]

What changes?!

Thanks!