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Warning About The Singlepower Extreme - Owners Please Read - Page 11

post #151 of 407
It could be any of the smaller units in this lineup but to be sure we'd have to see the sticker on the bottom of the transformer.
post #152 of 407
since we have the schematic, wouldn't it be easier and safer to build an Extreme from the ground up while using proper values for the components? The two most expensive parts - trafo and caps - will need replacing anyway if we are to save an existing Extreme amp.

I like the sound of the Extreme. Just don't want to put a round peg into a square hole. So I'm thinking build one using a newer chassis and wire things better - 90-deg P2P wiring, no cold solder, etc.
post #153 of 407
Quote:
Originally Posted by kevin gilmore View Post
I love that white wire in the middle hooked to nothing...
I'm guessing this was actually for a future upgrade, TBD. You send him another $1,000 and he connects the white wire to something.

--Jerome
post #154 of 407


Quote:
Originally Posted by jsaliga View Post
I'm guessing this was actually for a future upgrade, TBD. You send him another $1,000 and he connects the white wire to something.

--Jerome
post #155 of 407
There aren't many laughs in this situation, but jsaliga, your post is one of the funniest things I've seen recently. I wonder if there are testimonials to value of that upgrade.
post #156 of 407
Quote:
Originally Posted by Gvvt View Post
There aren't many laughs in this situation, but jsaliga, your post is one of the funniest things I've seen recently. I wonder if there are testimonials to value of that upgrade.
Yes, you are right... it is not funny... but laughter eases the pain and as someone (one of the *many*) who was hurt, at least financially, though not nearly as much as others, by Mikhail's selfishness, it is all I have left.
post #157 of 407
I've actually been debating posting that ever since I saw Kevin's comment about the white wire. It was the first thing that came to mind...and I can even imagine that if you looked at 10 different Singlepower amps with the white wire upgrade they would all be connected to something different.

While my post was meant to inject a little bit of humor at Mikhail's expense into a terrible situation for so many of my fellow head-fiers, part of it also reflects my complete and total contempt for the man. And this all makes me wonder whether or not there were people who paid him good money for upgrades, in which he did nothing to their amps, took their money, and sent them back just as they came to him. I don't know that this has happened, but it would not surprise me one bit to learn that it has.

If anyone thinks my post was in poor taste then please ask a moderator to delete it. I won't object.

--Jerome
post #158 of 407
Quote:
Originally Posted by jsaliga View Post
While my post was meant to inject a little bit of humor at Mikhail's expense into a terrible situation for so many of my fellow head-fiers, part of it also reflects my complete and total contempt for the man. And this all makes me wonder whether or not there were people who paid him good money for upgrades, in which he did nothing to their amps, took their money, and sent them back just as they came to him. I don't know that this has happened, but it would not surprise me one bit to learn that it has.
There are a few confirmed cases of this plus upgrades being paid for but never installed. My ES-1 is one of latter where almost none of the upgrades even made it into the amp. Some of the "upgrades" were also just a figment of Mikhail's imagination since they didn't apply to that circuit (or any circuit for that matter). He even charged extra for the double umbilical cables when the amp will not function with only one.

Another scary thing were amps sent in for service and returning after months with nothing done to them or even harvested for parts for some other amps. He was also keen to charge for "upgrades" when amps were sent in for service which were completely bogus and the amps were still broken when they were sent back. Just see the horrible story of the SS-1 aka. The Wallwart amp.
post #159 of 407
I knew about the wall warts. But sometimes it is a challenge to keep up with the ever-evolving Singlepower travesty, and sadly, nothing you have said here surprises me at all. I feel for the many people who got taken to the cleaners by Mikhail.

--Jerome
post #160 of 407
So i was nice enough to offer moonboy the services of nate maher who was stupid
enough to accept. So nate was nice enough to offer skylab my services and i was
stupid enough to accept. OK, i'm done with this

So skylab's replacement transformer showed up today.
And it was time to remove the old one. Now i know for a fact
that mikhail has a NC controlled vertical mill and is capable of
making nice holes in things.

http://gilmore.chem.northwestern.edu/skylab-12.jpg
The 4 hex head stainless steel screws are the new mounting
screws, drilled and taped on my personal mill in my basement.
I really like all the file and scratch marks...

finished unit
http://gilmore.chem.northwestern.edu/skylab-13.jpg

now the filter resistors had to go because once the transformer
was up to spec, there is 7 volts across 50 ohms, thats roughly
a watt that was being dissipated previously by two .25 watt resistors
in parallel. (which is why they were cracked and brown) so the
new resistors
http://gilmore.chem.northwestern.edu/skylab-14.jpg

So i start the mandatory 2000 hour listening/burnin test. And low and behold
there is an intermittent buzz in one channel. Turns out one of the ground
wires on the pot was never soldered to the circuit board, but in playing with
the pot, the knob came off because mikhail cut the shaft too short and the
knob was barely holding on.
http://gilmore.chem.northwestern.edu/skylab-15.jpg

how about that quality grinding job on the pot after cutting it off too short.

All of this is the most simple of stuff and he could not even get that right.

The CBS hytrons are definitely sweet sounding with the tungsol gain tube.
post #161 of 407
I am very grateful to Dr. Gilmore for fixing my Extreme up (and to Nate for coercing him into it ) He went way above and beyond for me.

It's amazing how bad things were in my amp, given that it seemed to be working OK. I was very close to having a very bad problem.
post #162 of 407
Congratulations and major kudos go to Dr Gilmore and Nate, both did go out of their way to help a couple of head fiers. I believe your amps should sound amazing after all the TLC they have received.
post #163 of 407
^Agreed, and actually both have gone out of their way to help many head-fiers over the years.
post #164 of 407
Hi,

Received my transformer from Electra-Print today and installed it with the help of a buddy who has a drill press and some nice metal working tools. I positioned the transformer to cover the holes and make use of the existing wire holes. I was actually able to cover or use every hole. All we had to do was expand the existing wire holes a bit and drill a couple more. I sorta like the angle of the tranny as it goes along with the tubes. Next I will wire it up and replace the filament rectifier with a 25 amp one.

I believe that my unit runs at 140v and so all of the caps seem to be adequately spec'd. I may put a bleeder resistor across the big PP cap in the HV supply.

Kevin. What is the value of those wire wound resistors that drop the filament back to ~6.3v?

So far, so good...

Perhaps we should rename this thread "Extreme Make-over."

Thanks to Kevin and Nate for helping us along.

Best,

Paul

post #165 of 407
I think that actually looks pretty cool.
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