Valve Itch phono

[Salas]

Never used it was said.

 

[RevMen]

Better late than never they say. Short answer is: HV creepage. I.e the clearances around R1 pads and other highly tensioned parts are minute to the underside ground plane for the 300V+ high voltage in the green rectification board. It arcs over the moment its associated with the high energy mains source ground. R1 acted like a fuse.

Thanks for looking at it. I'm still not understanding, though. It works fine if I replace the SSHV board with a resistor. Shouldn't it still be shorting if what you say is correct? It only burns up R1 when the SSHV is in the circuit and when it did spark it was under the SSHV board. Were you able to energize my power supply and reproduce the problem?

 

[merlin el mago]

What step-up are you using now?

 

[Salas]

Thanks for looking at it. I'm still not understanding, though. It works fine if I replace the SSHV board with a resistor. Shouldn't it still be shorting if what you say is correct? It only burns up R1 when the SSHV is in the circuit and when it did spark it was under the SSHV board. Were you able to energize my power supply and reproduce the problem?

Yes I found a proper Tx finally. With p2p rectification it does nothing, with the green board it does it. Don't know without SSHV2, I did the lot.

 

[Salas]

What step-up are you using now?

The Dyna was used, that Itch is not in my hands.

 

[merlin el mago]

You can't compare vs other step-up?

 

[Salas]

In the future, but don't hold your breath, Jensen is top of the crop.

 

[merlin el mago]

Are you sure? aren't better Tango or Tamura?

 

[Salas]

Don't know for so expensive Japanese. Jensen is technically the most documented at least. For comparing those I can I meant.

 

[merlin el mago]

Let me know how sounds the Jensen?

Have you used the Cree Sic Schottky rectifiers?

 

[Salas]

When I will make new personal Itch for my collection. Folded simplistic I prefer for accuracy so I will make Itch for emotion when inspired. I have almost everything for new Valve Itch.

 

[merlin el mago]

Sounds interesting, keep us informed with pics, components used, etc.

 

[Salas]

When ever if ever starting for pass time. For now enough projects in pipe line.

 

[merlin el mago]

When you start, let's see your work in progress.

 

[Salas]

I am usually making the humblest examples for my own use with cheap components. Nothing interesting.

 

[merlin el mago]

I wanna see your work & how you do make it, I'm not interested in expensive components except if sounds better than cheap components.

 

[Salas]

So, I've decided to take my work back underground. To stop it falling into the wrong hands... - YouTube

 

[merlin el mago]

Doesn' correct, you ask us always to show our work & you doesn't show us your work to learn.

 

[Salas]

I was joking obviously.

 

[merlin el mago]

I will wait your work to learn. I learned a lot with your help Salas, I always will be in debt with you.