Small Special

[alvarezh]

Thanks again!

Cheers!

[jon]

Thanks for the info Jelle, any chance you could name (model of 6L6 / brand) the power tubes?

Thanks again.

All the best.

Mesa STR440 Pulls

[alvarezh]

Thank you Jon, very kind of you.

Enjoy it!

All the best.

[cornel moldovan]

Sorry, but you made a mistake...i noticed it at the first sight... your coupling caps must be turned 180 degrees ,cos in this manner you have hum noise ... the marked side must be soldered to the plate...AM I RIGHT OR WRONG? [/b]

[wjdunham]

On the subject of the small special, I got to play a Morgan SW50 which is a sort-of clone of a Small Special that came in to Morgan's shop last year. It's not an exact clone, uses Jupiter yellow caps throughout for example, but otherwise looks pretty close. I was quite surprised how the amp sounded and felt, plenty of really warm clean breakup at reasonable volume levels. There is almost no high end filtering going on in these things (no snubbers, no grid stopper on V1B, and a 100pf bright cap that is always engaged, switch can add another 250pf), but the amp was not harsh in the least. Stock JJ preamp and Tung-Sol re-issue 5881's. Comments on where the mojo is coming from in these things? I have not built one, but hearing that amp may change my mind.
Jelle, do you get this amp up and running yet?
Bill

[jelle]

I guess that depends on the goal... The idea here was to make a small special clone with a twist, the jfet. The original amps have it the way it was done here.

No error, design choice from our end. No hum, either...

[qtone]

Really pristine inside looks fantastic as usual.
Jelle could you drop me a pm here.
Thanks qtone.

[jujudubluz]

jelle,

did you used the "60's dumble" schematic which has been online for years?

[jujudubluz]

here's what i've been working on:

-schematic

-i started a layout too...

let me know what you guys think...

juju

[jujudubluz]

here's my own layout

[dreric]

here's my own layout

That's a cool layout, what software did you use?

Eric

[jujudubluz]

@ dreric:

Autocad, it's a wonderful tool in 2D and 3D, i use it everyday.

[ChrisM]

here's what i've been working on:

-schematic

-i started a layout too...

let me know what you guys think...

juju

Quick look,

Your missing a coupling cap after the 2nd gain stage.

[jon]

@ dreric:

Autocad, it's a wonderful tool in 2D and 3D, i use it everyday.

FYI there is a great free CAD program called draftsight

[jon]

I need a little bit of speaker advice. I just bought a Reason Elite 2X12 from Anthony. I have one EV 12 Force speaker. What would you pair it with? I do have a WGS ReaperHP 50W speaker, but that would limit the cabinet to 100W, marginal at best with this amp.

http://www.stagecraftgear.com/servlet/t ... x12/Detail

http://wgs4.com/content/ReaperHP