Sunn Coliseum Bass Schematic Board 20-0026C

[TigerAmps]

Does anyone have a schematic for the Sunn Coliseum Bass driver board 20-0026C.

I am looking for the REV "C" schematic.
This board has only one 10uF/100V cap as opposed to two of them as seen on the 20-0026 base board (I have the 20-0026 schematic).
The amp is from 1971, but I am guessing they made revisions through out the year ...

The 20-0026 and 20-0026C are close, but also have a number of resistors that differ in values as well.

Thanks

[vintagekiki]

SUNN Schematics

http://music-electronics-forum.com/f35/
Forum: SUNN

https://support.fender.com/hc/en-us/articles/115002389226-SUNN-Schematics

http://el34world.com/charts/Schematics/files/sunn/Sunn_Schematics.htm

http://www.schematicsunlimited.com/s/sunn

http://www.prowessamplifiers.com/schematics/sunn/

http://schems.com/bmampscom/sun/

http://www.freeinfosociety.com/electronics/schempage.php?cat=1

https://elektrotanya.com/?q=showresult&what=sunn
Request registration to the site

http://viva-analog.com/sunn-beta-lead-resources/

http://music-electronics-forum.com/search.php?
Keyword(s): sunn

[TigerAmps]

Thanks, but they don't reference the "C" board. I was hoping that someone who was a Sunn service center might have the binder of schematics from back in the day.
One diagram is close (the resistor values somewhat match), but the diagram still show 2 polarized electrolytic caps, not one; and a few additional diodes.
It looks like they may have replaced a resistor and cap with a pair of diodes in series at the input stage.

I realize this is a long shot, but does anyone have the drawing/diagram of the Rev C board and any of the revisions?

Thanks

[vintagekiki]

The_Sunn_Shack

http://archive.li/lm7Mk

[vintagekiki]

SUNN Schematics

http://schems.com/schematicheaven.net/manu/sunn/sunn.htm

http://diagramasde.com/audio/Sunn

http://denis.sud-automatic.com/ampli/sunn/

http://www.4tubes.com/SCHEMATICS/BY-BRAND/Sunn/

https://irationaudio.com/tag/sunn/

http://www.preservationsound.com/?p=1740

https://www.ssguitar.com/index.php?topic=4208.0
https://www.ssguitar.com/index.php?topic=1880.0
Sunn Coliseum 300 bass
https://www.ssguitar.com/index.php?action=search2
Search for: sunn
Request registration to the site

http://guitaramplifiers.prv.pl/schematics.htm
http://student.agh.edu.pl/~mejdej/tom/schematics.htm
Find: Sunn

https://schematics.synchu.com/
Find: Sunn

[vintagekiki]

Sunn Schematic Board 20-0026

http://music-electronics-forum.com/t40653/

http://music-electronics-forum.com/attachments/36245d1445952238-coliseum_slave_72_2.gif

[TigerAmps]

For anyone interested - I finally had a chance to document this (since I could not find the REV-C schematic):

Coliseum-Rev-C.pdf

There are some differences in the component values and the schematic itself!