or Connect
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Where is Singlepower? Where is Mikhail?
New Posts  All Forums:Forum Nav:

Where is Singlepower? Where is Mikhail? - Page 13

post #181 of 1960
Thread Starter 
Also - additionally - at least for me, Mikhail has been very responsive. He called me to confirm everything was working, and then sent me two extra / replacement ECC/2C51 tube converters just in case that was the culprit with shorting out a few resisters the last time (and I just got those yesterday). I think this thread does work.

Neil
post #182 of 1960
Quote:
Originally Posted by nor_spoon View Post
Man, am I glad I put my money elsewhere.

As long and (sometimes) frustrating as the waits have been,(I'm on my third) I have never wished i had spent my money elsewhere.
post #183 of 1960
Quote:
Originally Posted by neilvg View Post
Yeah the R10's with jazz and classical are awesome. I don't listen to either very much so hence, HE90 all the way. Without trying to derail the OP's original intention of this thread, can you quickly state what tubes you use?

Neil
ES-2
2C51 Tung Sol
6BL7GTA Sylvania
EL34/6CA7 GE "Fat Boys"

SDS-XLR
6SN7GT VT-231 Sylvania
6BL7GTA GE

Had to switch from the 6SN7 to the 6BL7 in the middle stage of the ES-2 to smooth out some harshness (to my ears) from the 2C51.

I'm still not 100% on the tubes for the L3000.

How do you like the Mullard XF2 in the back? I was thinking about getting some and/or the new Genalex Gold Lion Reissues KT77.
post #184 of 1960
Thread Starter 
Quote:
Originally Posted by blubliss View Post
ES-2
2C51 Tung Sol
6BL7GTA Sylvania
EL34/6CA7 GE "Fat Boys"

SDS-XLR
6SN7GT VT-231 Sylvania
6BL7GTA GE

Had to switch from the 6SN7 to the 6BL7 in the middle stage of the ES-2 to smooth out some harshness (to my ears) from the 2C51.

I'm still not 100% on the tubes for the L3000.

How do you like the Mullard XF2 in the back? I was thinking about getting some and/or the new Genalex Gold Lion Reissues KT77.
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
post #185 of 1960
Quote:
Originally Posted by spritzer View Post
Could you give us some more information on this. It went silent as in both channels died and so did the power led's? Did you check the fuse and all the other basics?
Hey Spritzer, yep it went down pretty much like my Cary did. Both channels kind of like when you kill the power and you listen to the tubes as the transformer and capasitors drain. LED's out and all tubes powered down. I killed the power as soon as I heard it happening. Checked fuse (it is good).

I opened the PSU with the help of a drill to get the hex screws out. There was a wire nut rolling around the inside. It was just the cap of a wire, so no issue there. So after looking for anything burnt or loose (nothing there). I checked the voltage on the rectifiers. Both were producing a good 7.5V DC. I checked some of the other voltages, but I am not familure with the circuit to know if what is proper. But nothing was zero or very low.

So I am thinking of taking a look inside of the amp section next to see if there is anything obvious in there. Just don't want to send this back if I don't 'have' to.

cheers,
post #186 of 1960
Quote:
Originally Posted by neilvg View Post
He called me to confirm everything was working, and then sent me two extra / replacement ECC/2C51 tube converters just in case that was the culprit with shorting out a few resisters the last time (and I just got those yesterday). I think this thread does work.

Neil
How reliable are SP amps? Are breakdowns rare or common? I'm concerned based upon Neil's and Mikeymad's experience, and the apparent long repair time.
post #187 of 1960
I have had good luck with mine. the first is over five years old and Purk owns it now. It had a diode go. but it was repaired local for 46.00. Probably several thousand hours on it. SDS-XLR, zero problems. I have been using the Transparency preamp in my speaker system since first week of November without any problems. Hopefully my new preamp will give me the same trouble free use.
post #188 of 1960
Thread Starter 
Quote:
Originally Posted by Kang View Post
How reliable are SP amps? Are breakdowns rare or common? I'm concerned based upon Neil's and Mikeymad's experience, and the apparent long repair time.
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
post #189 of 1960
Quote:
Originally Posted by tom hankins View Post
I have had good luck with mine. the first is over five years old and Purk owns it now. It had a diode go. but it was repaired local for 46.00. Probably several thousand hours on it. SDS-XLR, zero problems. I have been using the Transparency preamp in my speaker system since first week of November without any problems. Hopefully my new preamp will give me the same trouble free use.
This amp is one of the first SP amps made (my SDS). I believe it has over 6000 hours on it. I had diode went bad couple times, the first time Mikhail repaired it free of charge, but the second time (last weekend) it was repaired by a local tech ( I didn't want to send it in) for less than one hour for $46, which is less than one way shipping alone!!

Purk
post #190 of 1960
Quote:
Originally Posted by Kang View Post
How reliable are SP amps? Are breakdowns rare or common? I'm concerned based upon Neil's and Mikeymad's experience, and the apparent long repair time.
I have owned a couple steel chassis MPX3's that are still being bought and sold on the forum.

I now have two black chassis MPX3's from 2004 .... and no problems since I have owned them. I updated both with the 12 volt option sometime in late 2004 or early 2005.

I have three PPX3 SLAM's, two purchased used in 2007, one new in 2005 .... also no problems.

I have an Extreme purchased and received Jan 2007 that has worked flawlessly despite the almost constant tuberolling.

I have an original steel chassis Supra that I bought used. The amp arrived damaged from shipping. They shipped the amp vertical with the volume control down.

I had the amp repaired (fractured diode in the cooling fan) and updated with the original 6bl7gta high voltage mod. This amp has worked flawlessly since the repair/ upgrade.

All of these amps remain dead quiet. I cant stand noise or hum. If I hear either the amp usually doesnt stay around long.
post #191 of 1960
Thank you all. Based upon your replies, SP reliability seems fine.
post #192 of 1960
Yep, seems its usually built very well, just sometimes you get lemons or something unlucky happens.
post #193 of 1960
Another happy amp owner. My amp was put on burn-in for three weeks non-stop in Jan. 07. I will typically leave it on for the weekends. To this day, dead silence and so much reserve power, I will never use it. I have taken it apart to review the workmanship and confirm the build with no complaints.

(sits down in back of the much more experienced crowd)
post #194 of 1960
I have an MPX3 from Sept 2003 that still works fine
post #195 of 1960
Quote:
Originally Posted by mikeymad View Post
Hey Spritzer, yep it went down pretty much like my Cary did. Both channels kind of like when you kill the power and you listen to the tubes as the transformer and capasitors drain. LED's out and all tubes powered down. I killed the power as soon as I heard it happening. Checked fuse (it is good).

I opened the PSU with the help of a drill to get the hex screws out. There was a wire nut rolling around the inside. It was just the cap of a wire, so no issue there. So after looking for anything burnt or loose (nothing there). I checked the voltage on the rectifiers. Both were producing a good 7.5V DC. I checked some of the other voltages, but I am not familure with the circuit to know if what is proper. But nothing was zero or very low.

So I am thinking of taking a look inside of the amp section next to see if there is anything obvious in there. Just don't want to send this back if I don't 'have' to.

cheers,
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.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Where is Singlepower? Where is Mikhail?