sv572-10 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 6th June 2007, 04:34 PM   #1
oj is offline oj  United States
diyAudio Member
 
Join Date: Jan 2007
Location: CT
Default sv572-10

Has anyone the Svetlana technical bulletin (or the schematics) on a SE amp built around a 6EM7 transformer-coupled to a SV572-10?
  Reply With Quote
Old 6th June 2007, 07:39 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: NY
? what are you asking? Does anyone have a copy of it, has anyone seen it, has anyone built it...

you know that tube has been out-of-production for years now, right? also, i've heard there were some early-failure issues with some of them. but on paper anyway, it looks great. better than a 211, easily.

you know where to buy some? cheap?
  Reply With Quote
Old 6th June 2007, 08:08 PM   #3
diyAudio Member
 
Join Date: Sep 2003
Location: London
I have five of these tubes, new in box and unused. I don't have any immediate projects for them so open to offers - I'm in London. Andy
  Reply With Quote
Old 6th June 2007, 08:22 PM   #4
oj is offline oj  United States
diyAudio Member
 
Join Date: Jan 2007
Location: CT
actually, I bought four matched tubes from Antique Electonic Supply a long time ago (probably, in 1999). So, I was just thinking to put them on use!
  Reply With Quote
Old 7th June 2007, 10:27 PM   #5
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
The SV572-10 is currently available from New Sensor and is in stock right at this very moment. (I checked) As far as I know it might still be in production, but in any case it is readily available. IIRC This tube was/is made by Reflector AKA ExpoPul which most of you would know as New Sensor.

It would not be my first choice, they are short lived, hard to drive, and thrive best at pretty high voltages. And they are no longer as inexpensive as they once were. If you've got them I'd run them, they do sound pretty good.

The old Svetlana project database is gone.. Most of these projects were originally published in either Glass Audio or VTV. I'd look at back issues of those as well.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 9th June 2007, 12:17 AM   #6
diyAudio Member
 
Join Date: Mar 2004
Location: Medford, MA
I cant find the tech bulletin for that, but I remember it. Karen
Preeda did it. If you can find/contact her - you might get a copy.
She used an ElectraPrint 3034 Interstage (5K 1:1). The 572-10
was run at its zero bias operating point, so the source side
of IT secondary was grounded and I think the 572-10 was run
at 550-600Vanode or so (find a zero-bias point on the spec sheet).

A 211 behaves roughly the same, so if you buy interstage TXs
for this design and get bored with the 572-10, you can very
nicely move on to the 211/845 at your leisure.

-- Jim
  Reply With Quote
Old 10th June 2007, 08:44 PM   #7
5u4 is offline 5u4  United States
diyAudio Member
 
5u4's Avatar
 
Join Date: Nov 2005
Location: N of Tampa
I built one of these amps 7 or 8 years ago. Not really my favorite amp, good bass & highs, but a very colored midrange. Maybe you'll have better luck.

Remember seeing a transformer coupled version somewhere too. Will search for the schematic & post it, if I find it. Also wanted to add, I had the filament burn out on a SV 811-10 & had to replace it.
Attached Images
File Type: gif 811.gif (20.9 KB, 241 views)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Svetlana SV572-10 ??? ICARE Tubes / Valves 24 17th July 2005 11:46 AM
Sv572-3 Se Hojvaelde Tubes / Valves 2 28th May 2005 02:14 PM
SV572-30: Opinions? serengetiplains Tubes / Valves 0 11th February 2005 08:06 PM
FS Sv572-3 dhaen Swap Meet 0 10th June 2002 11:38 AM


New To Site? Need Help?

All times are GMT. The time now is 09:47 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2