SRZ 6545

gearhead · Post by **gearhead** » Mon Feb 21, 2011 8:16 pm

Anybody has a line on a Dr Z SRZ 6545 schematic?

It's discontinued, and just can't seem to find one on the used market, so heck I'll take a shot.

gearhead · Post by **gearhead** » Tue Feb 22, 2011 3:57 pm

How about just a SRZ 65?

That's what I'm really after.

M Fowler · Post by **M Fowler** » Tue Feb 22, 2011 4:29 pm

I haven't seen any schematics or layouts for either amp only chassis gut shots.

Gaz · Post by **Gaz** » Tue Feb 22, 2011 11:34 pm

have you seen these pics? http://www.amparchives.com/album/Dr.%20 ... Innen.html

you can see quite a bit, but not enough to draw a schem. any other pictures than these? i wanna say the 65 channel is something like a jcm 800 with TMB stack, pre-PI master, and no NFB.

Darkbluemurder · Post by **Darkbluemurder** » Thu Feb 24, 2011 1:48 pm

It's basically a KT45 preamp combined with an SRZ preamp into a fixed bias EL34 power section. From what I have seen from a gut shot of the SRZ the preamp is basically Marshall 2203/04.

Wow - that was post no. 500.

C Moore · Post by **C Moore** » Thu Feb 24, 2011 3:38 pm

I do not have a schem, but I do own a SRZ65L. I can take as many gut shots as you want.....if that would be any help.
Best

gearhead · Post by **gearhead** » Thu Feb 24, 2011 4:09 pm

Thanks all for your replies!

hired hand wrote:I do not have a schem, but I do own a SRZ65L. I can take as many gut shots as you want.....if that would be any help.
Best

That would be crazy great, Thanks!

Obviously, do at your leisure.

C Moore · Post by **C Moore** » Thu Feb 24, 2011 4:18 pm

gearhead wrote:Thanks all for your replies!

hired hand wrote:I do not have a schem, but I do own a SRZ65L. I can take as many gut shots as you want.....if that would be any help.
Best
That would be crazy great, Thanks!

Obviously, do at your leisure.

No Problem.
I have to open the "Phineas J Whoopie" closet......so give me a day or two.
Back soon with the pics

C Moore · Post by **C Moore** » Sun Feb 27, 2011 2:16 am

Gaz · Post by **Gaz** » Sun Feb 27, 2011 4:06 am

don't feel bad, this isn't Mr. Zaite's circuit, it's Jim Marshall's

Gaz · Post by **Gaz** » Sun Feb 27, 2011 5:34 am

And I'm really not trying to hate too hard, but this made me LOL. From the website:

"The SRZ-65 is one of Dr Z's first designs going back 20 years. This amp was ahead of it’s time"

C Moore · Post by **C Moore** » Sun Feb 27, 2011 10:19 am

Gaz wrote:don't feel bad, this isn't Mr. Zaite's circuit, it's Jim Marshall's

Well.....that can be said of most amps, including all the ones that get built here. Think of all the AC15 and AC30 "variants" that get discussed.......
More than the circuit itself, is just the feeling of posting internals for the whole world to see and dissect. There are always little tweaks that get scrutinized, like the Xits X10.

dynaman · Post by **dynaman** » Sun Feb 27, 2011 1:48 pm

Yep. 2204 with minor tweaks not worth hiding. Still a great circuit.

C Moore · Post by **C Moore** » Sun Feb 27, 2011 3:15 pm

dynaman wrote:Yep. 2204 with minor tweaks not worth hiding. Still a great circuit.

Yeah, it has the sound/feel of a tube rectified JCM 800.
I have been inside a few Z amps, and they all were kind of roomy...."user friendly" so to speak.
I totally get where you guys are coming from. I do not have your knowledge of circuits. I would have to compare one schem to another to be able to see what is a copy-cat of what. But like I said, the circuit is not really the issue. It is the "first time" feeling of gut shooting a builders amp for the purpose of drawing a schematic that feels awkward. Just commenting on a passing emotion.....no harm done.

Thank You

M Fowler · Post by **M Fowler** » Sun Feb 27, 2011 3:54 pm

http://www.youtube.com/watch?v=s2jWEn_- ... re=related

The Amp Garage

SRZ 6545

SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545

Re: SRZ 6545