SV572-160 SE Amp

[scope515]

I have a number of SV572-160 tubes and wish to build an SE amp but cannot locate a suitable design. Can anyone help in this regard? Alternatively, what is required to adapt an SV572-10 design, of which there are several available online, to work with the 160 version tube? I have built many tube amps but this would my first using a power triode.

 

[astouffer]

You'll have to run this tube in class a2 so take a look at designs using the 811a to get an idea. I've found two different datasheets with operating points. 40 watts output supposedly.

https://frank.pocnet.net/sheets/164/s/SV572-160.pdf
https://shop.ehx.com/catalog/addimages/sv572-160-svetlana.pdf

Just beware that you will need an isolated dc filament supply for each channel. Low ripple is very important because of the high mu factor.

 

[56085]

I found these two in my collection of schematics but I did not check (if I even could) whether they are good designs or not.

 

[w5jag]

I ran some SV811-10 on a modified Tubelab TSE. They worked great.

The Tubelab power drive (MOSFET follower) is definitely the way to go with the lower mu variants. I have some -160, but have not tried them yet.

I've attached the Svetlana sheet for the SV572-160 and a technical bulletin on the SV811/572 tubes.

 

[Fuling]

For inspiration, look at amps using 811A as outputs. SV572-160 seems to be pretty much the same thing?

 

[scope515]

Thanks very much for the ideas, schematics and data, none of which I had or could locate. Collectively, they should enable me to make a start putting together a design that I could make work. Must say I did not consider that the 160 could be pretty much the same as the 811A, so never looked at the data for the latter.

Any further thoughts (no matter how basic as I'm new to using power triodes) or schematics are more than welcome. I need everything I can get hold of! I appreciate the responses from everyone so far.

 

[scope515]

Schematic 6BX7 driver

I found these two in my collection of schematics but I did not check (if I even could) whether they are good designs or not.

Hi, have you any more information on this schematic or its source, please?

 

[56085]

I think I must have found it on this site: SV572-160 - For How Much Longer Do We Tolerate Mass Murder? 出張所

I do not have more information on this amplifier.

 

[scope515]

Thank you so much. That site in itself is useful information. I like the schematic!

 

[Klimon]

Here's one with excellent documentation and lots of creative solutions:

A2 Amplifiers Part 2

Conversion to 572-160 is on the next page

 

[scope515]

Fantastic. I have printed the link and look forward to reading and digesting it. I appreciate your help.