Posted: Sun Dec 17, 2006 5:36 pmAlrighty then....One year later than I planned to start on this....I am finally going to rebuild the Sunn Sorado that was donated to me by luthier Paul Stephen.
middleaudio.com
Noise Talk, Saint John, New Brunswick & Area
http://forums.middleaudio.com/
Sunn Sorado Restoration
Page 1 of 1
Posted: Sun Dec 17, 2006 5:36 pmPosted: Sun Dec 17, 2006 5:38 pmSure, looks okay from the front, but a quick peek behind the scenes reveals some major issues.
Posted: Sun Dec 17, 2006 5:39 pmBesides the obviously missing tubes, we have a power transformer that is held in place by pipe strapping..
Posted: Sun Dec 17, 2006 5:40 pmI can't even imagine what was spilled here...
Posted: Sun Dec 17, 2006 5:43 pmI'm going to have to build a bracket to hold the transformer, and fill the gaps left from the original tranformer.
Posted: Sun Dec 17, 2006 5:47 pmHere is an overview of the external work that needs to be done....
- Chassis cleaning
- Replace tube sockets
- Replace tubes
- Fabricate xformer bracket
- Re-mount power xformer
- Replace filter cap
- New knobs
- New jacks
- Convert to a 3 wire electrical plug
Next posts......
A look INSIDE!!
- Chassis cleaning
- Replace tube sockets
- Replace tubes
- Fabricate xformer bracket
- Re-mount power xformer
- Replace filter cap
- New knobs
- New jacks
- Convert to a 3 wire electrical plug
Next posts......
A look INSIDE!!
Posted: Wed Dec 20, 2006 7:02 amWell,
Not as bad as I thought it might be.
First, here is a shot of an original Sorado, for reference....
...and here is mine from the same general angle....
These shots expose the fact that mine has been reworked fairly extensively after a power supply failure.
Not as bad as I thought it might be.
First, here is a shot of an original Sorado, for reference....
...and here is mine from the same general angle....
These shots expose the fact that mine has been reworked fairly extensively after a power supply failure.
Posted: Sat Dec 23, 2006 12:37 pmThat big orange cap is the biggest glaring difference between the original amp and mine.
A quick inspection of the wiring indicates that one section of the original quad section filter cap went bad, but instead of replacing the whole thing, somebody disconnected one section and subbed that big orange monstrosity.
A quick inspection of the wiring indicates that one section of the original quad section filter cap went bad, but instead of replacing the whole thing, somebody disconnected one section and subbed that big orange monstrosity.
Posted: Sat Dec 23, 2006 12:48 pmSunn chose a rather obscure tube, the 6AN8, for the front end of this amp. A combination triode / pentode, it does double duty as a preamp as well as a phase splitter.
http://www.radiomuseum.org/tubes/tube_6an8.html
http://www.radiomuseum.org/tubes/tube_6an8.html
Posted: Tue Jan 30, 2007 2:08 pmOkay kiddies....
I finally have a bit of time on the horizon (Friday night most likely) to resume the Sunn restoration.
New filter cap is here along with the clamp, and a replacement Cinch terminal strip.
I finally have a bit of time on the horizon (Friday night most likely) to resume the Sunn restoration.
New filter cap is here along with the clamp, and a replacement Cinch terminal strip.
Posted: Sat Feb 03, 2007 9:20 amAs you can see, Friday night didn't happen...I ended up working on a school install until 10:30.
Try again tonight....
Try again tonight....
Posted: Sun Mar 11, 2007 7:54 amWell crap...most of the winter has flown by....we're into March and I've been busy with commercial sound in the evenings.
I'm going to take another swing at the Sunn head and see if I can get it posted here like I promised....
I'm going to take another swing at the Sunn head and see if I can get it posted here like I promised....