Layout Revisions Please Check

[talbany]

Hey Everyone.. Due to a mis wiring of the Deep switch I have to revise the 2nd 3rd and Classic Layouts (They would have worked in the 2nd and 3rd gen layouts but this is how HAD wired it).. So please update these for me.. Thanks to Bob W for the point out on the classic... I try to make these as accurate as possible however mistakes happen.. Thanks and here they are..

Tony

[BobW]

Tony, Thank you for your wonderful efforts here.

[honeydip]

Great work, let me say thank you!

jan

[brewdude]

Thanks for donating such beautiful and helpful resources. It would take me forever to create a much less helpful and accurate image.

Can we get a sticky to lock layout and schematics of all these amps at the top of the forum?

[talbany]

Everyone

Glad to help out really.. This forum has given me great pleasure over the years and want to give something back..
Just please be patient with me through these revisions.. I like to post these here first to get some eyes on it if we need to do some revisions/ mistakes that's cool.. I may find some more details in my notes.. After we get these as close and as accurate as possible with the info we have at this time I'll see about cataloging these in the files section sticky for easy reference..

BTW If someone want's to donate pics or an accurate schematic of a SSS be glad to do a layout of that as well.. Anyone.. Didn't think so!!..Kidding

Tony

[Drumslinger]

Awesome work Tony. I refer back to the #124 quite a bit along with the schematic. Many thanks man.

[Colossal]

Tony,

Your layouts are awesome and I refer to them frequently for inspiration and education. Keep up the good work dude!

Regards,
Dave

[Structo]

Anybody know which amp this is?
At first I thought it was #40 but the speaker is different.


[img:400:396]http://lh6.ggpht.com/_MHnI-B0pJ8k/TLZLv ... 55-O-1.jpg[/img]
[img:400:372]http://lh5.ggpht.com/_MHnI-B0pJ8k/TLZLv ... 56-O-1.jpg[/img]

[Grog]

Is that not #75?

[guitardude57]

Thank you. Very fine work!

[Max]

Is that not #75?

Hi Grog,

the amp on the picture, which Tom (structo) has posted, that looks indeed similar to #040, is a 2nd generation "pre-classic" ODS 50W, but in a rather unusual cabinet for such a 2nd generation ODS combo. If it should really be #040, then the speaker has been changed after or before the pictures which you find on Rob Livesey's site have been taken. The 2nd generation amp in this picture has a 12" Altec 417-8H Series II speaker, AFAIK the usual original speaker of all 2nd and 3rd generation ODS combo amps.

2nd generation "pre-classic" ODS 50W amps, like this one on Tom's picture, have this kind of circuit: http://ampgarage.com/forum/viewtopic.ph ... 751#136751

But ODS #075, the Steve Farris amp, is a transition generation "classic" ODS 100W combo and has this kind of circuit: http://ampgarage.com/forum/viewtopic.ph ... 327#137327

but with some special tweaks done by Alexander Dumble here and there to fine-tune #075 to the personal taste of Steve Farris.

Cheers,

Max

[Structo]

Thanks Max.

Tony, just a minor point but on the 2nd and 3d gen layouts, the ground from the preamp output doesn't seem to go anywhere after it reaches the preamp board.
Does this ground on the preamp grounds (cathodes) or go to the buss?

[talbany]

Thanks Max.

Tony, just a minor point but on the 2nd and 3d gen layouts, the ground from the preamp output doesn't seem to go anywhere after it reaches the preamp board.
Does this ground on the preamp grounds (cathodes) or go to the buss?

Tom
The ground wire in this case (non isolated jack) is the shield so you don't want to ground it at both source and exit point in fear of a ground loop showing up.. Make sense?
Thanks for going over the layouts..

Tony

[Grog]

Is that not #75?

Hi Grog,

the amp on the picture, which Tom (structo) has posted, that looks indeed similar to #040, is a 2nd generation "pre-classic" ODS 50W, but in a rather unusual cabinet for such a 2nd generation ODS combo. If it should really be #040, then the speaker has been changed after or before the pictures which you find on Rob Livesey's site have been taken. The 2nd generation amp in this picture has a 12" Altec 417-8H Series II speaker, AFAIK the usual original speaker of all 2nd and 3rd generation ODS combo amps.

2nd generation "pre-classic" ODS 50W amps, like this one on Tom's picture, have this kind of circuit: http://ampgarage.com/forum/viewtopic.ph ... 751#136751

But ODS #075, the Steve Farris amp, is a transition generation "classic" ODS 100W combo and has this kind of circuit: http://ampgarage.com/forum/viewtopic.ph ... 327#137327

but with some special tweaks done by Alexander Dumble here and there to fine-tune #075 to the personal taste of Steve Farris.

Cheers,
Thanks Max, so the Farris amp sounds closer to the later Dumbles you think?
Max

[Max]

Thanks Max, so the Farris amp sounds closer to the later Dumbles you think?

Hi Grog,

the circuit of nearly all the transition generation "classic" amps like #075 is more or less the same one as the one of the 4th generation classic amps which is documented in this layout: http://ampgarage.com/forum/viewtopic.ph ... 327#137327

The only exception I know of is #094, which is a "high plate" classic, but perhaps because it was updated to "high plate" specs at some point:

The reason why I call the ODS amps like #075 or #093 "transition generation" is that they already have most of the 4th generation specs but not the 4th generation look. #075 as an example really looks more similar to #40 than #093, which is already black. But the circuit of #075 is indeed more "advanced" than the circuit of #093, because #075 has already both, a ratio control (on the back) and a full size presence on the front. But #093 still has an accent switch, but it is already a "blackface". Because of all these inconsistancies especially concerning their look and some features (presence or accent) of these "classic" amps from at least #075 to at least #094 I call them "transition generation" classic ODS amps.

Cheers,

Max