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Where is Singlepower? Where is Mikhail? - Page 14

post #196 of 1953
Quote:
Originally Posted by spritzer View Post
I assume that the amp was just sitting there when it happened so it's not a fault in the umbilical or something like that. If you didn't smell anything burning then all the components should be fine as when ESP amps go they often go with a bang. It your amp the PCB version or is it P-P wired as that makes it easier to troubleshoot.
I have not opened the Amp yet, but the PSU is a PCB.... I remember one of the boards did say 2006 (not that that means anything). You are correct I was just sitting there. But I though that I would check the connector power cables before I open the Amp section. It would seem strange to me if they would both go at the same time. Being that there are two of them, I would think that the amp section is pretty much two mono amps in the box. That is why I suspected the PSU first. Unless the umbilical cords are more like a circuit, rather than one for left and one for right.

Like some of the others mentioned above I might employ a couple of EE friends to look at it before shipping it anywhere.

Cheers,
post #197 of 1953
Since this thread is going in a few directions since it's opening...

If I may ask the SP amp owners: for a buyer from across the border having problems with a SP amp (even a new one) do these amps come with technical info sufficient to guide a local repair guy *most* of the time?

Seen how the time frame for repair can be problematic, money spent locally for the buyer seems a pretty good option.

Realistic?

Amicalement
post #198 of 1953
Quote:
Originally Posted by Genetic View Post
If I may ask the SP amp owners: for a buyer from across the border having problems with an SP amp (even a new one) do these amps come with technical info sufficient to guide a local repair guy *most* of the time?
the circuits tend towards the simpler side (to generalize tubevile in its entirety) a repair-person who has worked on tubes before should be able to find the problem and fix it fairly quickly.

Mikhail generally over-specs the parts in the circuit. I like that a LOT. I had a (name omitted) amp that burnt a resistor because it was not rated for enough power, to save less than $1....

it takes mikahil forever and 2 days to build anything, but when it comes it is totally worth it.

To add: my supra was mikhail's prototype IMHO, it was totally worth waiting 5 months for him to put sides on it and add 2 special options (high voltage switch, and adjustable bias).
post #199 of 1953
Quote:
Originally Posted by neilvg View Post
My amp - once given to me in working order (which took a few iterations and a visit from Mikhail) - worked just fine until I actually put a wrong tube in a socket and fried it. Mikhail fixed it, but apparently the circuit got weakened. Mikhail took it back again and basically re-did everything. It seems fine now (for now, and hopefully for years).

Neil
I guess that's the downside to having so many options?

That aside, every time I think there might be something wrong with my amp, it turns out being something else in the chain that's weak... working on making those links strong enough to bring out more of my amp.
post #200 of 1953
Quote:
Originally Posted by nikongod View Post
the circuits tend towards the simpler side (to generalize tubevile in its entirety) a repair-person who has worked on tubes before should be able to find the problem and fix it fairly quickly.
Thanks. I was wondering if their designs was leading to some kind of one man (the builder exclusively) repair job.

In that case the SP amps remain a reasonable risk for long distance buyers.

Amicalement
post #201 of 1953
Quote:
Originally Posted by mikeymad View Post
I have not opened the Amp yet, but the PSU is a PCB.... I remember one of the boards did say 2006 (not that that means anything). You are correct I was just sitting there. But I though that I would check the connector power cables before I open the Amp section. It would seem strange to me if they would both go at the same time. Being that there are two of them, I would think that the amp section is pretty much two mono amps in the box. That is why I suspected the PSU first. Unless the umbilical cords are more like a circuit, rather than one for left and one for right.

Like some of the others mentioned above I might employ a couple of EE friends to look at it before shipping it anywhere.

Cheers,
I would start by checking the rectifiers in the PSU and work my way forwards from there but the the PSU works on its own then it's the amp which has blown. The ES-1 has two umbilicals as there aren't enough pins in one for all the voltages needed. The amp section in those ES-1's which I've seen are built like most tube amps where the tubes are on each side but they are fed from the same PSU so not dual mono but that is just like throwing money away.

I would start by opening up the amp and see if there is something that stands out.
post #202 of 1953
Funny you should say I went though everything in the PSU and I found a bad resister last night. I will post my findings and pics in my old ES-1 thread as I go through a repair.

I hope that I will not have to ask 'where is Mikhail?'

Cheers,
post #203 of 1953
Quote:
Originally Posted by spritzer View Post
The ES-1 has two umbilicals as there aren't enough pins in one for all the voltages needed.
No, it's easy enough to get a connector that would allow all the voltages to be in one cable. However, that would not be a good idea sonically. The idea of two umbilicals is to keep the high voltages completely separate from the low voltages. This could create a problem if the umbilicals were mixed up, which would be bad. The amps is designed to take this for a short period, but the LED's will not light up, which is a warning that something is wrong (if the LED's do not light up, turn off the amp!). If an owner mixed up the umbilicals, so that high voltage was going to the low voltage components, and then left the amp running when power did not appear to go on, take a wild guess at the expected result.
post #204 of 1953
Quote:
Originally Posted by Hirsch View Post
No, it's easy enough to get a connector that would allow all the voltages to be in one cable. However, that would not be a good idea sonically. The idea of two umbilicals is to keep the high voltages completely separate from the low voltages. This could create a problem if the umbilicals were mixed up, which would be bad. The amps is designed to take this for a short period, but the LED's will not light up, which is a warning that something is wrong (if the LED's do not light up, turn off the amp!). If an owner mixed up the umbilicals, so that high voltage was going to the low voltage components, and then left the amp running when power did not appear to go on, take a wild guess at the expected result.
The heater can be run through the same umbilical but it has to be shielded and in a twisted pair configuration. It's not the voltages that are the problem but the current in the heater wiring which has to be kept away from the more sensitive, low current B+. I was merely correcting that they were dual mono which the obviously aren't but using the same connector for both umbilicals is reckless at best.
post #205 of 1953
I talked with Michael last week. He helped me locate a DC blcking cap in my MPX3. The last 4-5 times I have communcated with him, he's been very responsive about answering my questions and filling tube and adapter orders.

A couple of years ago I jumped on him in one of these group gripes, even though he'd always provided me good service, but when McAlister Audio had held me up for 6 months and then delivered equipment with a bunch of construction mistakes that cost me a lot ot fix (and i didn't say a word about this).

One of the members, here, jumped me for the inequity of my complaints and with good reason.

So let those among us who are without sin cast the first stone, eh?

Mikhail has to make hard choices. If you have something positive to offer about how he can improve his business practices, call him and talk about it directly. That's my suggestion. These group gripes accomplish what? Remind me.

I hope you all get your amps because they are beauties!
post #206 of 1953
Quote:
Originally Posted by neilvg View Post
I use the Jan-CEA 2C51 and they dont have any harshness for me, but 6BL7GTA didn't have enough bass and dynamics for my taste.

I love the XF2's, I also like the fat boy's but those I find a bit harsh on the top. So that might be your issue.

I also want to try the gold lion's and the super tube 2C51's. Forgot what those are called.

Neil
Hrm does your endorsement of EL34 types mean you have strayed from the 3D21(A/B) family ?
post #207 of 1953
Quote:
Originally Posted by Frihed89 View Post
These group gripes accomplish what? Remind me.
At least one amp got delivered, Neil's.
post #208 of 1953
Quote:
Originally Posted by Frihed89 View Post

So let those among us who are without sin cast the first stone, eh?

Mikhail has to make hard choices. If you have something positive to offer about how he can improve his business practices, call him and talk about it directly. That's my suggestion. These group gripes accomplish what? Remind me.

I hope you all get your amps because they are beauties!
"These group 'gripes' " first off let's address your use of the word gripe. While technically complaining about something could be considered a gripe I would prefer the use of the term absolutely legitimate complaint. Some of these amps are delayed one year plus. Your use of the word gripe has the effect of demeaning the poster as making a complaint that was unwarranted. This is clearly not the case.

Now let's address the second part, "call him and talk about it directly" HELLO did you read the thread title the use of the word "where" clearly indicated that attempts to reach SP were not successful??

Now on to your last comment this thread accomplished the amp being delivered.
post #209 of 1953
Quote:
Originally Posted by Frihed89 View Post
So let those among us who are without sin cast the first stone, eh?

Mikhail has to make hard choices. If you have something positive to offer about how he can improve his business practices, call him and talk about it directly. That's my suggestion. These group gripes accomplish what? Remind me.

I hope you all get your amps because they are beauties!
I can help you experience the "Single Power Blackhole."

Send me two of your amps for at least 9 months. Or, buy two amps and have them shipped to me, I'll look after them for you.

After a few months, I'll tell you the amps are ready to be shipped to you. Send me thousands of dollars. But I won't ship the amps for at least another 4 months.

Eventually, when I feel like it, I'll send you the amps. Don't know when that'll be, of course. Whenever you ask I'll tell you "sometime next week."
post #210 of 1953
Quote:
Originally Posted by Elephas View Post
I can help you experience the "Single Power Blackhole."

Send me two of your amps for at least 9 months. Or, buy two amps and have them shipped to me, I'll look after them for you.

After a few months, I'll tell you the amps are ready to be shipped to you. Send me thousands of dollars. But I won't ship the amps for at least another 4 months.

Eventually, when I feel like it, I'll send you the amps. Don't know when that'll be, of course. Whenever you ask I'll tell you "sometime next week."
Have you decided what you are going to do about those amps being held hostage?
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