The Single Power ES-1/2 repair and restoration thread - Page 2

Do me a favor, don't make a comment that sounds like HF is some how involved with Mikhail in preventing criticism from being posted when you have no basis. This was your comment. I think it goes a little further than, the "last time I posted..."

Spritzer, are these the original schematics or the corrected version?

If you conduct search you will find that the build quality and potential for problems were discussed at length as far back as 2004. People had paid enormous amounts for these amps and I do not think they could look at the facts clearly. Further clouding the picture were some amps that by all accounts truly sounded great. This has been a long time coming.

And I fear it is only going to get worse for quite a while.

Great thread spritzer!

If I could make two suggestions though;

You really need to add a high voltage warning in your original post! You and I know just how the lethal the voltages commonly found in these amps are and the precautions that need to be followed, but for the majority of SP owners, this may not be true.
Troubleshooting these amps are not something to be attempted by someone who isn't at least somewhat experienced with working on tube amps.

Since this thread could very well be used by a tech who knows nothing about electrostatic headphones/amps, or electrostatic amps, it might be useful to give a little primer to them, on their operation in general and what sets them apart from tube driven speaker amps.

That said, I'm delighted that you are the one that was chosen to receive this amazingly generous gift! I think that this thread is ample proof of that. I look forward to the next installment.

If this all works out I'm going to fly you out to my place so you can stay with me for a few days, get a vacation out of it.... oh, and fix my amp

Neil

Thanks for taking the time and effort to do this Spritz.

I was chastised for years for warning people about Singlepower and it's immoral path to hell, some saying that I had an agenda.

I now feel somewhat vindicated.

Of course this doesn't help those who have sunk large amounts of money into the money pit. Perhaps it will help future members from falling into the same pothole.

Yes, thanks. This has been as depressing as anything I've seen in a while. Hopefully some good comes out of this whole sorry mess.

Forgive me if I am off topic...

I think it is almost impossible to moderate the avalanche of information available at head-fi (that happens on every internet forum).

If people were here reading excellent reports from other users, moderators were not obliged to employ independent electronic engineers to test each and every amplifier.

I presume this role is assigned to an independent product safety certification organization (such as http://www.ul.com), Federal Communications Commission (About the Federal Communications Commission) or at least U.S. Consumer Product Safety Commission (CPSC Home Page - About Tab).

Just observe any electronic equipment in your house and you are going to see that all of them have several certifications and notes of compliance with international standards.

Having said that, I think moderators should not in any way criticize the noble attitude of the author of this thread.

Although the vast majority of head-fi users will not fully understand how an electronic circuit works, neither learn how to repair it or deal with high voltages, it helps to put trust again in the user related information head-fi makes possible to transmit.

All in all, these are the cons and pros of free speech...

One of the worst wiring job I've seen. No wonder the amp failed..

Man if you do that'd be awesome. Maybe he can bake us some bread too

Very nice thread indeed, although I do not own an electrostatic set up spritzer should be commended for this huge undertaking.