OD Reverb at Maverick -- Built similar to SSS02?

[mhartman]

Looking at this OD Reverb:

http://www.maverick-music.com/vintage-a ... son-browne

From the back view, it appears that the tube layout might be somewhat similar to that found in SSS01 and SSS02 (i.e., tubes are not all straight across the back wall of the chassis). Have any of you been in one of these? Is it a SSS style PCB build like an SSS?

[jelle]

I wondered if anyone would notice. Yes, my guess is PCB, just like some ODS amps with a similar tube layout.

Oh, the irony, the most expensive Dumbles are PCB amps.

[dreric]

I don't know................. looks a lot like #60 which was also built for Jackson Brown. Maybe a different reverb circuit? / tube placement

[Max]

From the back view, it appears that the tube layout might be somewhat similar to that found in SSS01 and SSS02 (i.e., tubes are not all straight across the back wall of the chassis).

Two rows of preamp tubes aren't unusual and not all the amps with two rows are PCB. There's one exception: Up to now I didn't see or hear of a SSS without at least one PCB. But you'll find Dumblelands - even early ones - with two rows but without PCB e. g..

With the exception of the "usual" Overdrive Special ("usual": 50W or 100W and without reverb or tremolo etc.) you can think about every Dumble amp as a "one of a kind" individual. Based on my own experiences it's just as Alexander Dumble tells:

"Once you got started, did a Dumble philosophy evolve?

I try to be flexible. ... The actual techniques I use to get the sound that I go after have evolved extensively. It's a growing process. That's the toughest thing about staying with one thing. You're always thinking of new ways to do it. Basically, I've kept the Overdrive the same but the other models are open to flexibility." Source: https://tubeamparchive.com/viewtopic.php?t=22012

Just in case it should be forgotten what was visible on the pictures of #060 and what has been reported in regard to the features, the signal path and the lineage etc: http://www.premierguitar.com/articles/12313

And here (at the end) you'll find two clips ("Clip 1" and "Clip 2") recorded with #60: http://www.premierguitar.com/articles/A ... ve_Special

BTW: When taking into regard the kind of relationship between Alexander Dumble and Jackson Browne IMO it’s rather probable, that all the gear built for the studio of Jackson Browne and/or his personal use got an update whenever Alexander Dumble and/or Jackson Browne felt the need.

Jelle, I’m fine. Thanks for your friendly interest.

Cheers,

Max

[Aaron]

Also note, #59 has an 8 ohm output, #60 4 ohm output.

Amazing that these two amps have two completely different layouts.

Max, do know when #59 could have been made?

Thanks,
Aaron

[mhartman]

Thanks Max. I always enjoy your posts. Do you know of any gutshots of the non-pcb Dumbles with "front and back" preamp tube arrangements? It would be interesting to see how Dumble arranges the boards in this type of layout (perhaps like a Two Rock Opal?).

Looking at this amp and thinking through the possible OD Reverb layouts, I'm still thinking that this may be a PCB based amp (just based on what I'm seeing with the tube locations as compared to SSS02). That being said, I don't think we'll ever know unless someone wants to pony up for this one and check it out.

This certainly keeps it fun!

[dreric]

I wondered if anyone would notice. Yes, my guess is PCB, just like some ODS amps with a similar tube layout.

Oh, the irony, the most expensive Dumbles are PCB amps.

Jelle,

Other than the SSS, I'm not familiar with any Dumbles having PCBs. Do you have photos of ODS or other amps with PCBs?

Thanks
Eric

[jelle]

Hi Eric,

Yes I do. In one case, the pics show amps with a PCB where normally the eyelet board would be, with normal tube locations.

The earlier ODS versions with PCB actually show a construction style that is similar to the SSS pics that have been shared here.

I have not seen an ODRS with that construction technique, but since the amp discussed here is from about the same era as the ODS amps with PCB and two rows of preamptubes, it is not hard to envision what happened here.

One other thing: at least one ODRS does not have PCB nor eyeletboards.

Anyway, for some reason, the ODS and ODRS amps switched back from PCB to eyelet board construction, so there must have been a reason for it. I wonder what that was.

Have fun!

jelle

[Max]

Do you know of any gutshots of the non-pcb Dumbles with "front and back" preamp tube arrangements?

I've attached two pictures I once downloaded from the "Treasures Of Equipment"website. AFAIK it shows Alexander Dumble working on the EF86 Dumbleland 150W with tremolo and reverb - but without the filters - that has been discussed here (1st picture).

Cheers,

Max

[Max]

Max, do you know when #59 could have been made?

"could have":

Based on all I know about the "history" of the ODS amps with reverb, I suspect somewhere between 1978 and 1982. But AFAIK Alexander Dumble often updated all the amps in the studio of Jackson Browne. AFAIR the ODR of Rick Vito (#058) looks rather similar from the back. So what he tells about #058 might be interesting in regard to the "history" of #059, too:

"Here are some of my favorites: a late seventies Dumble Overdrive with Reverb … Jackson Browne’s "Lawyers In Love" had some good playing, especially the tracks, "Tender Is The Night", and "For A Rocker" among others. This was when I switched to the Dumble amp that Jackson subsequently very kindly gave to me. The sound got much bigger and I was able to expand my world a little after that amp."

Source: http://pdf.acmeguitarworks.com/Press-To ... 005-01.pdf

Cheers,

Max

[jelle]

If Dumble did what I think he did in designing that silver alligator amp, then I think he is an absolute genius. I wish I could play this amp some day.

And am I correct in thinking that only the power supply board on that amp is PCB? The board with the Nichicon caps?

[Max]

And am I correct in thinking that only the power supply board on that amp is PCB? The board with the Nichicon caps?

Hi Jelle, Yes and No.

No: AFAIR both power supply boards are PCB - the small one and the big one with Spragues.

Yes: AFAIR these two power supply boards are the only PCBs in this amp.

[jelle]

Ok, sure, that makes sense. Thanks for that. Much appreciated. Jelle

[rogb]

Max, do you know when #59 could have been made?

"could have":

Based on all I know about the "history" of the ODS amps with reverb, I suspect somewhere between 1978 and 1982. But AFAIK Alexander Dumble often updated all the amps in the studio of Jackson Browne. AFAIR the ODR of Rick Vito (#058) looks rather similar from the back. So what he tells about #058 might be interesting in regard to the "history" of #059, too:

"Here are some of my favorites: a late seventies Dumble Overdrive with Reverb … Jackson Browne’s "Lawyers In Love" had some good playing, especially the tracks, "Tender Is The Night", and "For A Rocker" among others. This was when I switched to the Dumble amp that Jackson subsequently very kindly gave to me. The sound got much bigger and I was able to expand my world a little after that amp."

Source: http://pdf.acmeguitarworks.com/Press-To ... 005-01.pdf

Cheers,

Max

Thank you for the Rick Vito link. It's particularly interesting to me as I have always aimed to have a bunch of styles and tones available to the musicians I support. Sadly I'm not in the Vito league though.

[mhartman]

Thanks guys. This is some great info. This section dies down to almost nothing from time-to-time, but I'm always amazed how little things like pcb/non-pcb can spark interest.