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previous: Ricky I'm using a 275-0-275 VAC power tra... -- 1/16/2000 7:20 PM

Re: 5E3 rectifier

1/16/2000 7:48 PM
Bruce	Re: 5E3 rectifier It depends on a few things Ricky. Who is the tranny made by, what is the line voltage into the PT, what is the current rating of the PT and how much are you loading the PT down. etc. Unloaded with no tubes, I bet that tranny will charge your filter caps up to close 390 to 420vdc. If you have a 120v primary...275vac/100ma secondary PT and your line voltage is around 120v, and you are using it with your 5E3 tweed clone idling at around 36ma-40ma each 6V6GT, I'd expect to see about 330v-340v dc. If you use this with a 5AR4, I think you'll jump about 20 to 25 volts up. Solid state will be a little higher again, maybe another 10-12vdc higher then the 5AR4. I build a little power supply that uses a 270vac/120ma tranny with solid state rectifier and it runs the B+ up to about 360vdc under a 76ma total load. Perfect for quite a few different, small under 20 watt amps. By the way, in these little low powered amps, it has been my experience that a beam forming power tubes like a 6V6GTs or 6L6GCs, don't seem so voltage dependent for good solid power output once you get the plate up over 320v. Bruce

1/16/2000 7:48 PM

Bruce

Re: 5E3 rectifier

It depends on a few things Ricky.
Who is the tranny made by, what is the line voltage into the PT, what is the current rating of the PT and how much are you loading the PT down. etc.
Unloaded with no tubes, I bet that tranny will charge your filter caps up to close 390 to 420vdc.
If you have a 120v primary...275vac/100ma secondary PT and your line voltage is around 120v, and you are using it with your 5E3 tweed clone idling at around 36ma-40ma each 6V6GT, I'd expect to see about 330v-340v dc.
If you use this with a 5AR4, I think you'll jump about 20 to 25 volts up.
Solid state will be a little higher again, maybe another
10-12vdc higher then the 5AR4.
I build a little power supply that uses a 270vac/120ma tranny with solid state rectifier and it runs the B+ up to about 360vdc under a 76ma total load.
Perfect for quite a few different, small under 20 watt amps.

By the way, in these little low powered amps, it has been my experience that a beam forming power tubes like a 6V6GTs or 6L6GCs, don't seem so voltage dependent for good solid power output once you get the plate up over 320v.

Bruce

Replies:

Ricky this transformer has 150mA of curre... -- 1/16/2000 8:24 PM