Niegative bias voltage, rectifier.

[Albert Kreuzer]

No special reason. Perahps I could say the coil helps isolate the switching noise from the diode, but I use the fast recovery diodes. I've also done this on one HV supply for my 813 project, but that was to keep the voltage stress off the part. In this case, 1.4 KV.

-g

So you think there is less voltage across the rectifier if one side is connected to ground?

[mooreamps]

So you think there is less voltage across the rectifier if one side is connected to ground?

Not the point.

[mooreamps]

For the sake of being different.

No. For the sake of doing it correctly.

-g

[Albert Kreuzer]

Not the point.

Thought so. Would you please care to explain what the point is? Just curious.

[mooreamps]

Thought so. Would you please care to explain what the point is? Just curious.

No special reason. Just the way I do it. For a bias supply, it probably does not matter. But, for a 1.4 KV Beam Power Supply, it tends to be my preferred method.

-g

[Albert Kreuzer]

No special reason. Just the way I do it.

Ah, OK. Thanks. I was just wondering about the "doing it correctly" thing...

[mooreamps]

Ah, OK. Thanks. I was just wondering about the "doing it correctly" thing...

I take it you don't build high voltage power supplies in that kind of power range , or higher. Oh, perhaps you're assuming I only work on guitar amps..

-g

[Albert Kreuzer]

I take it you don't build high voltage power supplies in that kind of power range , or higher.

You're right, I don't.
But I'd like to learn how to "do it correctly", just in case. Can you give me any information or links on that subject?

Oh, perhaps you're assuming I only work on guitar amps..

I'm not assuming anything. What else do you work on?

[Wilder Amplification]

You're right, I don't.
But I'd like to learn how to "do it correctly", just in case. Can you give me any information or links on that subject?

I have no idea what he means by "correctly". Doing it the traditional way yields the same end result as the other way with no tradeoffs of any kind so technically BOTH ways are the "correct" way.

[mooreamps]

I'm not assuming anything. What else do you work on?

R1051 B HF Radio Receiver
AN/URC-35 Transceiver
AN/WSC-3(V)9 UHF AM/ FM Radio Set
AN/FRT-39 5 KW HF transmitter
AN/FRT-40 10 KW HF transmitter
Collins Microwave
AN/FSC-78 Navy Satcom
AN/FSC-79 Navy Fleetbroadcast
AN/TSC-54 Army Satcom
DSAT Army Mobile Satcom
AN/USC-60A Navy Mobile Tactical Satcom
DSCS 3 AVE {Aerospace Vehicle Electronics}
DSCS 3 MTE {Maintenance Test Equipment}
30 GHz cyro cooled parametric amplifier
5 KW SHF Traveling Wave Tube power amplifier
10 KW SHF Klystron Tube power amplifier
400 Watt Solid State TWTA SHF power amplifier

[Albert Kreuzer]

Impressive.
I especially like the term "cryo cooled". Sounds somewhat comparable to "thermally heated"...

And for the information on "doing it correctly"?

[Albert Kreuzer]

I have no idea what he means by "correctly". Doing it the traditional way yields the same end result as the other way with no tradeoffs of any kind so technically BOTH ways are the "correct" way.

Yes, I know (I think). The only reason I can imagine is a single diode screwed to the chassis for cooling - you wouldn't have to isolate it from 1.4kV.
But who knows, maybe I'll learn something new

[mooreamps]

Impressive.
I especially like the term "cryo cooled". Sounds somewhat comparable to "thermally heated"...

And for the information on "doing it correctly"?

Perhaps a poor choice of words given the question asked. I use the RCA manual and Fender schematics as a baseline, and then go from there.

-g

[mooreamps]

Yes, I know (I think). The only reason I can imagine is a single diode screwed to the chassis for cooling - you wouldn't have to isolate it from 1.4kV.
But who knows, maybe I'll learn something new

Sansui used the same technique on some of their tube audio amps. No, not for an 813 beam power supply; but for their twin EL-34 power amp units.

-g

[Wilder Amplification]

With as little current as is being drawn from a typical bias supply cooling isn't even a factor worth considering.