Need 200S Chassis photos

Greg_M · #1 10-08-2010, 06:54 PM

If anyone has their 200S amp apart I would really like to get some photos of the wiring of the chassis.
Some nice closeups so I can figure out component placement.

Thanks

lowphatbass · #2 10-08-2010, 08:10 PM

I've got one shot that's fairly central, from the best I can tell mine is an early '67. I'll have it opened-up again soon to swap out the 2-prong power cable. Shoot me a PM, you should also search the Sunn discussion page Q & A.

Greg_M · #3 10-08-2010, 08:45 PM

Outstanding !

That's really great
Thanks

Greg_M · #4 10-10-2010, 09:21 AM

Thought I would bump this up

BassmanPaul · #5 10-10-2010, 10:27 AM

Why? Although a picture paints a thousand words the schematic tells all.

Greg_M · #6 10-10-2010, 10:46 AM

Layout!
Got the schematics

BassmanPaul · #7 10-10-2010, 10:49 AM

Quote:

Originally Posted by Greg_M

Layout
Got the schematics

AHA Watson, I do believe someone is trying to clone a Sunn amp!

If Holmes is right good luck with the project.

Greg_M · #8 10-10-2010, 11:04 AM

Exactly....

Placement of critical components makes for less hum and other bad things.
Why re-invent the wheel?

The only problem so far is the biggest chassis I can find is 17 x 10 x 2 (Hammond). And of course the front of it does not have the angle.

So mine will just be a little smaller and a little different.

The above picture pretty much shows everything except for there seems to be one tube missing.

KramerBassFan · #9 10-10-2010, 12:13 PM

http://www.tubesandmore.com/

Greg_M · #10 10-10-2010, 12:19 PM

Not sure what you are pointing at?

KramerBassFan · #11 10-10-2010, 12:27 PM

That link totally didn't work... sorry

BUT, they sell a hammond chassis box which is 17x10x3... and its HUGE.

BassmanPaul · #12 10-10-2010, 12:35 PM

Quote:

Originally Posted by Greg_M

The only problem so far is the biggest chassis I can find is 17 x 10 x 2 (Hammond). And of course the front of it does not have the angle.

The chassis is always the problem for the home builder. I decided to ape Fender because I came across some empty head cases and combo cases on Ebay. I went to a local metal fabricator and had them make me up some 16 gauge steel chassis' to fit them. Finished and enamelled cost me under $100 per. It was only then that I found out they could have cut all my holes for me at no extra cost. I guess I'll have to go the long route with my collection of chassis punches.

There was a guy called Comboking who would make you what you needed out of aluminium with welded seams. His son had a run in with cancer and he stopped production for a while. Perhaps he has started up again. He did make me a small chassis to fit a Fender Champ box I found. It was a really good job. Control panels, I found Amplates who will or would do you professional front and rear plates. I've not used them yet, Hopefully they are still in business.

KramerBassFan · #13 10-10-2010, 12:48 PM

Amplates is still in business i believe.

Mr. Foxen · #14 10-10-2010, 12:50 PM

I know a guy in the UK who can make up chassis if you provide a cardboard mock up, or other means of accurately conveying the dimensions. PM for details.

Greg_M · #15 10-10-2010, 01:53 PM

Actually I don't think I want to try to make a perfect copy. It seems almost blasphemous.

Except that I want it to be the same electrical circuit.

In ancient times, I did use Dynaco Mk IIIs, which the 200S is a direct copy of. And as we all know the early 200S amps just had the stock Mk III bolted right in there with a slightly modified Dynaco PAM-1 preamp.

I guess I'm saying....

Workalike....Yes.
Lookalike...Maybe not

Although If I could find an old chassis/head that was gutted, I might just repopulate it with modern parts.

Greg_M · #16 10-16-2010, 09:00 AM

Jhtjon · #17 10-16-2010, 01:23 PM

I believe that this guy will make you what ever you want http://stores.ebay.com/CHASSIS-SUPPLY . and Triode Electronics has transformers at a reasonable price. And http://thecabguy.com will make you a head cabinet at a good price.

rllefebv · #18 10-16-2010, 09:13 PM

Hey Greg,

I had my 200S apart today and took some photos... Here's a full chassis shot, and I have other close-ups if you want 'em...

-robert

Greg_M · #19 10-17-2010, 08:37 AM

Thank you!

A close up of the LEFT side of the picture where the power transformer is would be great.

Thank you Jhtjon for those links

Greg_M · #20 10-24-2010, 09:40 AM

Bump

Always looking for more photos. Specially the AC end of the chassis