Dumbleland Anyone?

[didit]

Dynaco a451, if you can find one. Close enough when frequency spec is adjusted to 70Hz-15KHz.

Best .. Ian

[Colossal]

Dynaco a451, if you can find one. Close enough when frequency spec is adjusted to 70Hz-15KHz.

Best .. Ian

I had one wound for a 4xKT88/6550 bass amp. They are huge.

[didit]

Which manufacturer built this, and did you get the all dressed up fully potted version?

Best .. Ian

[talbany]

Dynaco a451, if you can find one. Close enough when frequency spec is adjusted to 70Hz-15KHz.

Best .. Ian

Winterland 200 watt Power I'll take it

1107621809_ef4bab5a2b.jpg

Output

1108467290_2e9793b47b.jpg

1108468354_0f7db5b81b.jpg

Tony

Dynaco Transformers.pdf

[Colossal]

Which manufacturer built this, and did you get the all dressed up fully potted version?

Best .. Ian

Hi Ian,

Heyboer built it for me. 2k2 primary and ultralinear taps. It is not potted, however. It probably weighs 10kg or better.

Dave

[Colossal]

Very cool, Tony! Thanks for the catalog. Fun to see all the specs (and the low prices )

[jfs322]

and of course used the output section from #002.

The Dumblelands did not use a DC coupled CF driver ala the SSS amps. Rather, it used the driver section taken from the Winterland/Odyssey amps (AC coupled, similar to a McIntosh power amp). I'd swap out the #002 driver section for the Winterland/Odyssey driver section, tweaked to taste. That will get you closer to historically accurate Dumbleland specs. Now, whether you'll prefer the sound to #002, that's a different story. Many don't.

[talbany]

and of course used the output section from #002.

The Dumblelands did not use a DC coupled CF driver ala the SSS amps. Rather, it used the driver section taken from the Winterland/Odyssey amps (AC coupled, similar to a McIntosh power amp). I'd swap out the #002 driver section for the Winterland/Odyssey driver section, tweaked to taste. That will get you closer to historically accurate Dumbleland specs. Now, whether you'll prefer the sound to #002, that's a different story. Many don't.

Thanks! Yes I am familiar with AC coupled Driver I actually put one in the ODS I built for Zac Brown in this video (4:00)
https://www.youtube.com/watch?v=e4ujS1er1r0

If you don't mind me asking how you know this? have you ever seen one in person or have seen pictures or have a ser#..I ask because the one here #009 sounds an awful lot like an DC coupled one

https://www.youtube.com/watch?v=zthE05CGFvY

BTW.Other amps that use DC Coupled are Super Twin and Peavey Roadmaster IIRC
Thanks!
Tony

[rccolgan]

Can I join the fun? I already created the chassis and silkscreen artwork! The only problem is my "educational license" has expired so I can't personally update the drawings beyond what is already done. Attaching some pics (note, Dumble's name was only used to make sure the alignment was correct) Anyone got a contact at a sheet metal shop for a few of them for us? The 3D files are in AutoDesk Inventor *.IPT files

[Max]

... Now, whether you'll prefer the sound to #002, that's a different story. ...

"... I actually started making a series of amplifiers called the Dumbleland in about '66, and I still make them. That was the forerunner of the Steel-String Singer. I didn't change a whole lot about that; it was a design way ahead of its time. It was too much power and too silky clean for people. It's perfect for Stevie Ray, though. ... " https://ampgarage.com/forum/viewtopic.php?f=4&t=22012

Cheers,

Max

[jfs322]

and of course used the output section from #002.

The Dumblelands did not use a DC coupled CF driver ala the SSS amps. Rather, it used the driver section taken from the Winterland/Odyssey amps (AC coupled, similar to a McIntosh power amp). I'd swap out the #002 driver section for the Winterland/Odyssey driver section, tweaked to taste. That will get you closer to historically accurate Dumbleland specs. Now, whether you'll prefer the sound to #002, that's a different story. Many don't.

Thanks! Yes I am familiar with AC coupled Driver I actually put one in the ODS I built for Zac Brown in this video (4:00)
https://www.youtube.com/watch?v=e4ujS1er1r0

If you don't mind me asking how you know this? have you ever seen one in person or have seen pictures or have a ser#..I ask because the one here #009 sounds an awful lot like an DC coupled one

https://www.youtube.com/watch?v=zthE05CGFvY

BTW.Other amps that use DC Coupled are Super Twin and Peavey Roadmaster IIRC
Thanks!
Tony

I am friends with some of the guys at Two-Rock, and was fortunate to have them build me a Dumbleland style amp based on the Dumbleland they had on their bench many many years ago. Not sure which serial number they had, though. Might have been #009? Not sure. But yeah, the driver circuit on the Dumbleland style amp they built is nearly identical to layouts/schematics I've seen on these forums for the Winterland amps (or Odyssey, I get the two mixed up as to which of the two has the 12BH7 driver circuit). The values are slightly different -- that's why I said tweak to taste -- but the overall AC coupled driver topology appears to be the same.

EDIT: Just checked, it's the Odyssey amp I'm referring to. Basically, the PI/driver board topology of the Dumbleland style clone that TR built for me is nearly identical in toplogy (values different though) to that shown here: https://ampgarage.com/forum/viewtopic.p ... it=odyssey

[talbany]

The Dumblelands did not use a DC coupled CF driver ala the SSS amps. Rather, it used the driver section taken from the Winterland/Odyssey amps (AC coupled, similar to a McIntosh power amp). I'd swap out the #002 driver section for the Winterland/Odyssey driver section, tweaked to taste. That will get you closer to historically accurate Dumbleland specs. Now, whether you'll prefer the sound to #002, that's a different story. Many don't.

Thanks! Yes I am familiar with AC coupled Driver I actually put one in the ODS I built for Zac Brown in this video (4:00)
https://www.youtube.com/watch?v=e4ujS1er1r0

If you don't mind me asking how you know this? have you ever seen one in person or have seen pictures or have a ser#..I ask because the one here #009 sounds an awful lot like an DC coupled one

https://www.youtube.com/watch?v=zthE05CGFvY

BTW.Other amps that use DC Coupled are Super Twin and Peavey Roadmaster IIRC
Thanks!
Tony

I am friends with some of the guys at Two-Rock, and was fortunate to have them build me a Dumbleland style amp based on the Dumbleland they had on their bench many many years ago. Not sure which serial number they had, though. Might have been #009? Not sure. But yeah, the driver circuit on the Dumbleland style amp they built is nearly identical to layouts/schematics I've seen on these forums for the Winterland amps (or Odyssey, I get the two mixed up as to which of the two has the 12BH7 driver circuit). The values are slightly different -- that's why I said tweak to taste -- but the overall AC coupled driver topology appears to be the same.

Thats great and thanks for the clarification!..Here is the Winterland #003 pretty much the only shots after a Winterland search.

1108467782_a7e5086872.jpg

1108466902_2551204ca5.jpg

Winterland #003 (3).jpg

dumble_winterland_no0003_9.jpg

Tony

[talbany]

EDIT: Just checked, it's the Odyssey amp I'm referring to. Basically, the PI/driver board topology of the Dumbleland style clone that TR built for me is nearly identical in toplogy (values different though) to that shown here: https://ampgarage.com/forum/viewtopic.p ... it=odyssey

.Thanks!
The Winterland closely resembles the Williamson /Split load..
The Odyssey is LTP (common cathode) and driver
They both appear to have similar driver set ups accept for the .22 couplers on the Winterland vs the .1 for the Odyssey which is more than likely set up for guitar and that Winterland for bass..I assume?
(The give away is the common cathode on V1 and V2 of the Odyssey.. The Winterland has no shared cathode on V2..If they were similar both V2 and V3 of the Winterland would be shared like the Odyssey.Both are AC driven.


Tony

[talbany]

... Now, whether you'll prefer the sound to #002, that's a different story. ...

"... I actually started making a series of amplifiers called the Dumbleland in about '66, and I still make them. That was the forerunner of the Steel-String Singer. I didn't change a whole lot about that; it was a design way ahead of its time. It was too much power and too silky clean for people. It's perfect for Stevie Ray, though. ... " https://ampgarage.com/forum/viewtopic.php?f=4&t=22012

Cheers,

Max

So Judging by this quote from H.A.D Max gave us he if he is talking about the output section (which I think he is) he is talking about the DC driver being too silky clean which is a good way to describe the DC Driver. The AC one being not as silky leads to believe he went with the D.C coupled..The question now is ? Is it Ultralinear? like the Winterland in the shots I posted.

Tony

[Max]

Just to avoid misunderstandings:

AFAIR the individual amps from the "series of amplifiers" (A. Dumble) with DL written on their front or - sometimes - only on their back (e.g. "DL-150VG") are all different: different tonestacks, different feedback circuits (preamp), different filter circuits (or no filters at all), at least one with an overdrive circuit, at least one with a tremolo circuit, with reverb (e.g. price list May 15, 1978: Dumbleland Special 150W with reverb $1,760.00), without reverb (e.g. price list May 15, 1978: Dumbleland Special 150W without reverb $1,410.00), different power amp circuits, different power supplies, different transformers, different chassis dimensions (e.g. long chassis with all tubes in one row, shorter but deeper chassis with all tubes in two rows), different layouts etc.. And because of all these different circuit specs, layout specs, transformer specs, etc. ... , they all sound more or less different, even though you can read DL on all their chassis.

Cheers,

Max