Dumbleator Power supply

[Ed de Jager]

Hi,with my amp functioning well i think it`s time to build a Dumbleator so i can use the effects loop and add a bit of reverb and echo.
My chassis is very small so i can`t fit the Dumbleator into it.It has to be a stand alone unit.
I have a Hammond 369 EX PT which gives 190-0-190V but i don`t know much about power supplies neither do i understand Duncans powersupply designer very much.
The question is;can i just copy the power supply from the P1 amp from ax84 or would it be better otherwise?
P1 schematic: http://annex.ax84.com/media/ax84_m61.pdf

Thanks in advance,Ed

[mlp-mx6]

Power supply is in this thread.

https://tubeamparchive.com/viewtopic.ph ... c&start=15

[Funkalicousgroove]

You want 135-135 and run a voltage doubler, with the PT you are talking about you'll be about 100v low.

[tele_player]

Do you mean 135-0-135 (center tapped) or 0-135 (not center tapped)?

[Funkalicousgroove]

If you are running a voltage doubler you do not use a CT unless you are fond of BAD SMELLING smoke

[Ed de Jager]

I have another giving 275-0-275.Only 70Ma but allright for one ecc tube.
Would that be o.k.?Can i use this filtering?
Ed

[Funkalicousgroove]

The trannie is fine if you rectify full wave, the filtering you want 22uf, 15K resistor, 33uf, 100K resistor, 33uf.

[tele_player]

If you are running a voltage doubler you do not use a CT unless you are fond of BAD SMELLING smoke

OK, so you mean a 0-135, I expected that.

[Ed de Jager]

Thank you!


Ed

[Ed de Jager]

I finally finished but something strange is happening.It is working but the plate voltages seem off.On pin 6 i am reading 354 Volts and on pin 1 there is initially 278 volts but when i hold my probe on it it climbs to 330Volts,what does that mean?A leaky filter cap?
Thanks in advance,Ed