"70ies circuit Bludodrive"

[Max]

2nd generation "pre-classic" ODS tone

Here I've posted two clips that have been recorded with a 2nd generation ODS:

https://tubeamparchive.com/viewtopic.ph ... 368#129368

Cheers,

Max

[Max]

2nd generation "pre-classic" ODS 50W

I've posted two clips with the clean and the lead sound of such an amp in the "Dumble reference" thread: https://tubeamparchive.com/viewtopic.ph ... 483#136483

You find all the detailed info (recording gear etc) there.

Cheers,

Max

[ampcrack]

DKT

Hi Tom,

I don't know what DKT means?

Perhaps: Digital Key Telephone?

Please explain.

Best,

John

[ampcrack]

Hi John,
I know that the amps imported by Applied Acoustics started with #19,
their showroom amp that I tried at their shop in 1978, and ended with #68 AFAIK.I was referring to a qoute from the Dumble Book where HAD
states that he completed "ten amps in ten days that were to be shipped to
Germany".Although I am not 100% sure, this might refer to the amps I believe to be from this shipment.Assuming that HADs statement is correct,
that would not leave him much time to perfect the tone of each individual amp, would it?
What I do know for sure is that many of these amps were changed later on.
The amps sold by "Spiecker & Pulch" (hope I got the name correct)
in Ratingen, Germany, are a different story.The Roys told me that
these,too, were imported by them, this may or may not be true.
FWIW at the time (!978/79) other shops in Germany ran ads for Dumbles
as well, if I remember correctly a place called "Music Market" in Cologne
and "Bochen&Härle" in Munderkingen.
Hope this makes a bit clearer, enjoying everybody´s contributions

Marcos

Hi Marcos,

maybe he did complete 10 amps in 10 days.
You're right, in that Dumble Book interview he does say that he was only able to do that because he had all the parts and nobody disturbed him....

But I really can't beleive that he sent them straight out before tweaking them.

I don't know of anybody who got their amp on time...

How long did it take till you got yours?

Best,

John

[Mr Dumble]

Great sounding amp for sure.

If you can't learn the circuit from the pictures I think you're gonna be out of luck. Brandon builds amps for a living and it would be a bit rude to post the circuit.

Huh? Its Dumbles circuit, not Brandons. He is annoyed at stealing circuits from someone else?? Thats how he is making his living, no?

[Drumslinger]

10 amps in 10 days? amazing!

[Bob-I]

Great sounding amp for sure.

If you can't learn the circuit from the pictures I think you're gonna be out of luck. Brandon builds amps for a living and it would be a bit rude to post the circuit.

Huh? Its Dumbles circuit, not Brandons. He is annoyed at stealing circuits from someone else?? Thats how he is making his living, no?

Um... yea.. so?

This is not unprecedented. Marshall stole Fender's ckt back in the early 60's. Companies steal from each other all the time, and of course hide their products inner workings from others.

[Structo]

DKT

Hi Tom,

I don't know what DKT means?

Perhaps: Digital Key Telephone?

Please explain.

Best,

John

Dumble Knows Tone

[jborders5]

Great sounding amp for sure.

If you can't learn the circuit from the pictures I think you're gonna be out of luck. Brandon builds amps for a living and it would be a bit rude to post the circuit.

Huh? Its Dumbles circuit, not Brandons. He is annoyed at stealing circuits from someone else?? Thats how he is making his living, no?

From what I see, this is not a 100% copy of an original amp. Even though the layout/schematic originated from a combination of Dumble amps, I would still give him credit for combining and tweaking the circuit. I have no problem saying I would like to try this Bludotone circuit in a future build, so Brandon can you PM me the details so I don't have to try and decipher the small gut shot pic .

[Mr Dumble]

Great sounding amp for sure.

If you can't learn the circuit from the pictures I think you're gonna be out of luck. Brandon builds amps for a living and it would be a bit rude to post the circuit.

Huh? Its Dumbles circuit, not Brandons. He is annoyed at stealing circuits from someone else?? Thats how he is making his living, no?

Um... yea.. so?

This is not unprecedented. Marshall stole Fender's ckt back in the early 60's. Companies steal from each other all the time, and of course hide their products inner workings from others.

Wrong. We are talking direct clones. Ironic dont you think?

[mlp-mx6]

Huh? Its Dumbles circuit, not Brandons. He is annoyed at stealing circuits from someone else?? Thats how he is making his living, no?

Um... yea.. so?

This is not unprecedented. Marshall stole Fender's ckt back in the early 60's. Companies steal from each other all the time, and of course hide their products inner workings from others.

Wrong. We are talking direct clones. Ironic dont you think?

The original Marshall amps were direct clones of the 5F6-A Bassman circuit.

[Bob-I]

Wrong.

Wrong REALLY... that's what you want to say?

It was my opinion. You don't have to agree, I still think it was rude to ask for that information regardless of where he got it from.

I support your right to have an opinion no matter how wrong it may be.

[bluesfendermanblues]

Guys, relax

In every industri the market players immitate and innovate each other, thats the name of the game.

[Max]

We are talking direct clones.

IMO this is most probably not the case. I am familiar with at least ten ODS amps from the seventies from 1st generation to transition generation. And even if I am not able to tell apart just looking at the pictures exactly what generation Brandon's "70ies amp" shall be a "tone replica" of, I suppose that this is no "clone" of a real "70ies amp" in a technical sense. That is why I asked if someone here knows more concerning this.

At least no Dumble ODS amp from the seventies I am familiar with did have a ratio control but no snubbers and no "trigger" trim pot and such a kind of power supply. All the original Dumble ODS amps from the seventies I am familiar with that did have a ratio control (transition generation "classic") had snubbers and the "trigger trim pot OD entrance", too. And no original seventies Dumble ODS with a ratio control (transition generation) I am familiar with had caps soldered to the bass pot like I believe to see in Brandon's "70ies amp" and no snubbers that I don't see in Brandon's amp.

So IMO this is most probably no "Dumble ODS clone" in a technical sense but at the most a "tone replica" of one of the four different generations of Dumble ODS amps that have been built in the seventies (1st generation "pre-classic" to transition generation "classic").

But perhaps this is even a complete creation of Brandon on his own that has perhaps been inspired by the tone of some of the seventies Dumble ODS amps that he is familiar with or that are known from records.

So perhaps Brandon's customer who had posted these pictures at "The Gear Page", where I did find them, did use the term "70ies circuit" not in a technical sense, but in some kind of figurative sense to express: "different tone than the one we know from Larry on "Last Nite" (4th generation "classic") or from Robben's current performances ("skyline" with the "Ojai tweaks")"?

Cheers,

Max

[groovtubin]

We are talking direct clones.

IMO this is most probably not the case. I am familiar with at least ten ODS amps from the seventies from 1st generation to transition generation. And even if I am not able to tell apart just looking at the pictures exactly what generation Brandon's "70ies amp" shall be a "tone replica" of, I suppose that this is no "clone" of a real "70ies amp" in a technical sense. That is why I asked if someone here knows more concerning this.

At least no Dumble ODS amp from the seventies I am familiar with did have a ratio control but no snubbers and no "trigger" trim pot and such a kind of power supply. All the original Dumble ODS amps from the seventies I am familiar with that did have a ratio control (transition generation "classic") had snubbers and the "trigger trim pot OD entrance", too. And no original seventies Dumble ODS with a ratio control (transition generation) I am familiar with had caps soldered to the bass pot like I believe to see in Brandon's "70ies amp" and no snubbers that I don't see in Brandon's amp.

So IMO this is most probably no "Dumble ODS clone" in a technical sense but at the most a "tone replica" of one of the four different generations of Dumble ODS amps that have been built in the seventies (1st generation "pre-classic" to transition generation "classic").

But perhaps this is even a complete creation of Brandon on his own that has perhaps been inspired by the tone of some of the seventies Dumble ODS amps that he is familiar with or that are known from records.

So perhaps Brandon's customer who had posted these pictures at "The Gear Page", where I did find them, did use the term "70ies circuit" not in a technical sense, but in some kind of figurative sense to express: "different tone than the one we know from Larry on "Last Nite" (4th generation "classic") or from Robben's current performances ("skyline" with the "Ojai tweaks")"?

Cheers,

Max

Max i have a customer amp in house w #40 circuit (1 x 12/1 x 10.. no fet) , and a ratio control, due to changing the circuit at last minute... It sounded SO good i LEFT IT IN! lol! The amp was built in 2006..May be ALL you need to load up the preamp and cop that xtra gain..IN MY OPINION, THIS IS the AMP.... I sold a personal combo amp w/that circuit and have regretted ever since. Another one wil be in work soon! lol!

peace, jim