Dumble ODS Generation Information by Max

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Structo
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Dumble ODS Generation Information by Max

Post by Structo »

This information was graciously submitted by Max.

The term "generation" refers to ODS chassis with a very similar look that's different from the look of the previous and the next generation.

The 2nd generation ODS chassis e. g. has slide switches (see attached picture) and the 3rd generation ODS chassis e. g. has small toggle switches (see attached picture).

And in many of the ODS chassis with a similar "generation-look" - but not in all! - you'll find similar circuit specs, too - at least if they haven't been updated at same later point in time by Alexander Dumble.

In many of the 2nd generation ODS chassis you'll find e. g. this kind of circuit: DEAD LINK: http:// ampgarage .com/ forum /download/ file.php?id=14336

And in many of the 3rd generation ODS chassis you'll find e. g. this kind of circuit: http://ampgarage.com/forum/download/file.php?id=14344

Cheers,

Max
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Last edited by Structo on Sat Feb 02, 2013 5:15 pm, edited 2 times in total.
Tom

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Re: Dumble ODS Generation Information by Max

Post by Structo »

In more than 50% of the never updated and still all original ODS chassis with the 2nd generation look you'll find the "pre-standard" OD circuit and a version of the "pre-classic" tone stack with a Clariostat 500K treble pot and two capacitors soldered to the bass pot: DEAD LINK: http:// ampgarage .com/forum/download/file.php?id=14336

In more than 50% of the never updated and still all original ODS chassis with the 3nd generation look you'll find the "pre-standard" OD circuit and the version of the "pre-classic" tone stack with a CTS 250K treble pot and only one capacitor soldered to the bass pot and Tandy Wire RG59/U foam coax cables (and no longer the Colombia Flexfoam coax cables): http://ampgarage.com/forum/download/file.php?id=14344

In more than 50% of the never updated and still all original ODS chassis with the "transition generation" look you'll find a "standard" OD cicuit, a "classic" tone stack and a "low plate" configuration similar to the circuit shown in this layout (but some with still an accent switch and without a PB relay): DEAD LINK: http:// ampgarage. com /forum/download/file.php?id=14346

In more than 50% of the never updated and still all original ODS chassis with the 4th generation look you'll find a "standard" OD cicuit (some with an internal h. f. taper control trim pot), a "classic" tone stack and a "low plate" configuration similar to the circuit shown in this layout e. g.: DEAD LINK: http:// ampgarage .com /forum/download/file.php?id=14346 or a "high plate" version of the circuit shown in this layout .

In more than 50% of the never updated and still all original ODS chassis with the 5th generation look you'll find a "standard" OD circuit, a "skyline" tone stack and some version of the "high plate" configuration and a precision power supply with or without a choke and white teflon coax cables similar to the circuit shown and discussed in this thread e. g.: http://ampgarage.com/forum/viewtopic.ph ... 400#143400

In more than 50% of the never updated and still all original ODS chassis with the 6th generation look you'll find a "HRM" OD circuit, a "skyline" or "bluesmaster" tone stack (with a bluesmaster PI) and some version of the "high plate" configuration, a precision power supply and white teflon coax cables - the "bluesmaster" version with a circuit similar to the circuit shown in this layout: http://ampgarage.com/forum/download/file.php?id=15545

Cheers,

Max
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Re: Dumble ODS Generation Information by Max

Post by Structo »

From 4th to 6th Generation
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Re: Dumble ODS Generation Information by Max

Post by Structo »

7th generation ODS pictures

So these are the different looks of the 100W and 50W ODS chassis I know of.

Now some kind of "caveat":

IMO one should always keep in mind when using the term "generation" that it might first and foremost be used referring to some kind of look in order to fascilitate communication by avoiding the need for a detailed description of the look of some Dumble ODS chassis.

Dumble ODS amps are all "custom made" and AFAIK their circuits are all different - some more - some less. Up to now I don't know of even two ODS amps with an 100% identical circuit and layout and with 100% identical parts. And sometimes you'll meet rather unusual ODS amps with unusual features like rotary switches in the "deep" position, custom made boost options etc. etc.

And the "sticky" ODS layouts in this files section are AFAIK (with the exception of the 124 "low plate classic" and the "Bluesmaster" layouts) all derived from unique real Dumble ODS amps and aren't some kind of "best of xy generation" collection of circuit specs. So #0182 and #0184 might have rather different circuits than the one shown in the layout of #0183 e.g.

So IMO posting or linking to a schematic and/or layout might fascilitate communication and might help to avoid misunderstandings when reporting on some new "xy generation with precision supply and bluesmaster stack" build.

Have fun!

Max
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