Simplistic Mosfet HV Shunt Regs - Page 292

merlin el mago · 11th April 2012, 09:44 PM

Quote:

Originally Posted by Salas

I think he had an Infinicap on that pic. Has a funny end termination technique. Could it have been intermittent if bent a few times in the past?

Quote:

Originally Posted by Salas

Oh, oh, imagine if it was shorting to the extra pads under it...
TRT InfiniCap Warning!!!

Interesting to know & in the future avoid problems.

merlin el mago · 13th April 2012, 11:51 AM

WOW

vgeorge · 13th April 2012, 12:08 PM

What happened Felipe?

AndrewT · 13th April 2012, 12:27 PM

Merlin is still capable of typing, so he's still alive.

merlin el mago · 13th April 2012, 12:32 PM

George I don't have words to describe the very big upgrade using the SSHV2, I never suspected that tubes can reach same or very near level of information like SS, now I understood (thanks to Salas) how much important is to have a very good shunt regulator, also thank crt to his layout & to Tea-Bag for the GB and all people like you & others testing the beta boards to be possible all of us enjoy your splendid work, thanks to everybody involved.

vgeorge · 13th April 2012, 01:53 PM

Good that you like it!
The comparison is with SSHV1, right?
When you listen more to it, a more detailed feedback will be welcome.
And always be careful with HV.

merlin el mago · 13th April 2012, 02:38 PM

Yes compared vs SSHV1.

I have a little of hum, my psu is CLC 150uF+10H+150uF, original psu attached, it's possible that I need more capacitance to eliminate the hum?

N.B. proper grounding following the diyAudio.com Articles: Audio Component Grounding and Interconnection

Audio Component Grounding and Interconnection

Help will welcome.

Salas · 13th April 2012, 05:38 PM

Good report, ending well = all well. I don't think that any hum has to do with line ripple especially when with regulated B+. First of all 100Hz ripple would sound more like a 'bzzz', its harmonic noise with many midrange peaks, 50Hz sounds deeper like ''hUmmm''. Can be some small ground loop or field. Possibly. Even instability, but that normally sounds bad too and heats up much.

merlin el mago · 13th April 2012, 07:25 PM

I increased 220uF the PSU but isn't fixed.

I grounded the MM RIAA chasis because Speakon is only 4 pole (2 for heaters + 2 B+) so I wired one cable between GND chassis PSU to GND chasis MM RIAA & the hum isn't fixed, I have the same level/amount of hum but the tone changed seems more low after seemed more high.

Salas · 13th April 2012, 07:48 PM

Quote:

Originally Posted by merlin el mago

I increased 220uF the PSU but isn't fixed.

It isn't ripple. Keep on searching grounding, move the regulator to hear possible difference, post the phono photo & schema with points of PSU receive.

13th April 2012, 12:08 PM	#2913
vgeorge diyAudio Member Join Date: Mar 2004 Location: poros island	What happened Felipe? __________________ "Without deviations from the norm, progress is not possible" - Frank Zappa

13th April 2012, 01:53 PM	#2916
vgeorge diyAudio Member Join Date: Mar 2004 Location: poros island	Good that you like it! The comparison is with SSHV1, right? When you listen more to it, a more detailed feedback will be welcome. And always be careful with HV. __________________ "Without deviations from the norm, progress is not possible" - Frank Zappa

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13th April 2012, 11:51 AM	#2912
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	WOW

13th April 2012, 12:27 PM	#2914
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Merlin is still capable of typing, so he's still alive.

13th April 2012, 12:32 PM	#2915
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	George I don't have words to describe the very big upgrade using the SSHV2, I never suspected that tubes can reach same or very near level of information like SS, now I understood (thanks to Salas) how much important is to have a very good shunt regulator, also thank crt to his layout & to Tea-Bag for the GB and all people like you & others testing the beta boards to be possible all of us enjoy your splendid work, thanks to everybody involved.

13th April 2012, 05:38 PM	#2918
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Good report, ending well = all well. I don't think that any hum has to do with line ripple especially when with regulated B+. First of all 100Hz ripple would sound more like a 'bzzz', its harmonic noise with many midrange peaks, 50Hz sounds deeper like ''hUmmm''. Can be some small ground loop or field. Possibly. Even instability, but that normally sounds bad too and heats up much.

13th April 2012, 07:25 PM	#2919
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	I increased 220uF the PSU but isn't fixed. I grounded the MM RIAA chasis because Speakon is only 4 pole (2 for heaters + 2 B+) so I wired one cable between GND chassis PSU to GND chasis MM RIAA & the hum isn't fixed, I have the same level/amount of hum but the tone changed seems more low after seemed more high.