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i'm on a roll... the kgsshv


kevin gilmore

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the magic smoke results from the temporary caps shorting out the diode...

Then apply power. And the other diodes in the bridge go flying.

You would think that 15 amp peak diodes with a transformer that can only

supply 250ma would win, but they don't.

The cap across the primary doubles the spike noise it turns out. My equipment is evidently

better than JC's.

The sequerra method of a dual inductor (as in transformer but of only 10mh)

with the main current thru the primary, and the secondary added out of phase with

a tune cap also has no effect. (besides its way to big)

The real life self inductance of the power caps makes any attempts at CRLCRLC pointless.

When driven from a stack of mercury batteries (3 x 225v) and no load the circuit noise

really is about 1.5 microvolt peak to peak.

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cool, well perhaps you saw my version around here in a thread, but a shameless plug nonetheless here:

unreg.jpg

I'm working on the PCB now. It's for much smaller currents and voltages of course.

The large line cap needs MOVs to absorb large spikes and the CMC handles the smaller ones. Thermistors handle the interaction upon turn-on with the main caps.

I tried the Sequerra method too. Didn't work as well as the two CMC.

Anyways, congrats on the supply, looks like a winner.

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the magic smoke results from the temporary caps shorting out the diode...

Then apply power. And the other diodes in the bridge go flying.

You would think that 15 amp peak diodes with a transformer that can only

supply 250ma would win, but they don't.

The cap across the primary doubles the spike noise it turns out. My equipment is evidently

better than JC's.

The sequerra method of a dual inductor (as in transformer but of only 10mh)

with the main current thru the primary, and the secondary added out of phase with

a tune cap also has no effect. (besides its way to big)

The real life self inductance of the power caps makes any attempts at CRLCRLC pointless.

When driven from a stack of mercury batteries (3 x 225v) and no load the circuit noise

really is about 1.5 microvolt peak to peak.

Kevin,

Have you ever tried John Swenson's snubber across the xfrmr secondaries?

Tube DIY Asylum - Different type of snubber - John Swenson - March 26, 2010 at 15:08:48

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  • 3 weeks later...
For the record, please include me in the group buy.

For the record, you should read the thread before posting:

To manage things the group buy of boards will be a seperate thread.

:D heh, I mean that the 0 AC30 AC30 should be 0 AC15 AC15. If its an RSA product, all the transistors would have their part number rubbed out.

Ah yes....with the red nail polish upgrade as well, I take it?

Spritzer:

is there anyway we could include the new TOTL Stax earspeaker in the kit as well? k thx bye.

For the record, I'm interested in this kit as well. kthxbye

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