Superb Michael.

Yeah, male PSU connectors leading from the PSU are a terrible idea.  Otherwise it looks good. 

did not notice that.  bad idea on the connectors

@ nopants: the Galaxy has what is referred to as "quasi heatsink" which the GR HV is attached to. I can barely detect a temperature rise after a few hours running in 70 F ambient temperature. My Antek trafo has 325vac secondaries (IIRC) that is regulated down to 400VDC so the voltage drop on the pass transistors is not too severe. 

@ JoaMat and UFN: yes, no volume pot  I rely on the digital volume on my TPA Buffalo DAC. It's a controversial topic I know but it does save me a bundle of $$$ 

@ GeorgeP, Birgir and Kevin: yes, I don't like the idea of using male connector on the chassis end either but that's the only way this Y2M-7TK connector comes to my knowledge. I have been searching for some connector covers to use for this reason but have yet to find any that fits. May have to bite the bullet and sprint for the Ampheno connectors some day.

Re: the servo; I believe you need to engage both servos to have the opto servo working. It works very well by the way.

Very nice Michael!

Though I also agree on the connectors. Female only on power out.

Why female only?

I am now building a two box design, too.

another question: is it necessary to separate filament and regulated PS into two wire? How much is the benefit?

Edited November 25, 20169 yr by joehpj

You don’t want the male pins be exposed with voltage on them. Imagine your 2 years old grandchild about to explore the world and found the exposed kV pins.

IMO it’s not necessary to separate filament wires from the others.

Very nice.  Congratulations.

I also think it's not necessary to separate the AC filament wires from the regulated DC wires. I did it my way because it actually simplifies the wiring and keep the cost of the connectors down. 

Nice!

on the topic of connectors, does amphenol sell caps/covers for theirs? I was thinking about what to do with my amplifier if I choose to put it in storage.

About measuring the voltage from electrostatic amp, I read a comment on Tyll's article http://www.innerfidelity.com/content/stax-mafia-makes-unrefusable-offer-and-i-begin-electrostatic-headphone-measurement-program

quote

As far as measuring the voltage on any of the stuff that's ballassed with a build-out resistor, forget about any voltmeter you might have. I haven't found a voltmeter or oscilloscope with a high enough impedance not to load down the voltage and give an incorrect reading.

quote done

What does built-out resistor mean?

Edited December 27, 20169 yr by mtoc

ballast resistor

On 2016/4/3 at 11:20 PM, congo5 said:

https://www.zofzpcb.com/

 

Hello, how to use this software to view Kevin's zip gerb files?

Google?

 

 

Brain transplant might also help.  If you can't get a viewer to work but want to build high voltage equipment...it might just be Darwin at work. 

Oops, nm, misread. Carry on

Edited December 27, 20169 yr by Pars

4 hours ago, mtoc said:

Hello, how to use this software to view Kevin's zip gerb files?

Haven't tried the software Congo5 points to; I use the free GerberLogix that directly supports zip'ed gerbers (even drag-n-drop). Haven't tried all gerbers from Kevin, but a fair amount, and it seems to work fine.

at some point soon I will be posting in x2 format, so some gerber viewers might not like that.

 

yes, carry on.

Edited December 28, 20169 yr by GeorgeP

^ Thanks George, just realized my mistake. Carry on

I don't know, I usually use gerbview, works fine with zip files. Does zofzpcb support zip files? 

edit: zofz finally works after multi-trying.

edit2: Zofz only works twice on my old-granny-level-pc. gerbview and gerberlogix work normally on my this old computer. That Zofz stuff is cool! I havta save some dough to buy a lastest Intel-i3-platform first!! Or even Zen!!

edit3: zofz is indeed amazing! sometimes it works alth under cpu load 99% (envy you guys' decent computers)

Edited December 28, 20169 yr by mtoc

9 hours ago, spritzer said:

Brain transplant might also help.  If you can't get a viewer to work but want to build high voltage equipment...it might just be Darwin at work. 

 

the first step is always the most difficult. although you could laugh at, man... after frying a bunch of amps, I think I will get a working one.

Quote

after frying a bunch of amps, I think I will get a working one.

Ahhhh... the old Edison principle at work.

..although, sometimes you need to cut your losses as in:-

Quit while you're behind - when you're in a hole, don't dig.

Edited December 28, 20169 yr by wink