ODS #046

[Runaway J]

Just saw an nice little story about the ‘Dumble Myth’ in the german guitar magazine ’grandgtrs’.
Mostly info about HAD’s history and different ODS generations, but nothing that hasn’t already been discussed here much more in detail.
The included pics of #046 are very nice though.
Take a look at http://www.grandguitars.de/
You’ve got to flip the pages until 155.

2nd generation ODS with added ratio and presence pots near the level pot. Modified by Larry Grohmann (aka novosibir IIRC).
The amp is sitting in a new cab made by tubetown.
Seems the amp once had a built in d-lator that has been removed again (typical holes in the back + hole for another tube socket).
Also there’s HAD’s hand drawn explanation of how to add a d-lator to the signal chain.
BTW the pictures come from Tony Albany. Must have heard the name somewhere …
Cheers
Jürgen

[M Fowler]

I couldn't get the pages to zoom in.

[Max]

Seems the amp once had a built in d-lator that has been removed again (typical holes in the back + hole for another tube socket).
Also there’s HAD’s hand drawn explanation of how to add a d-lator to the signal chain.

Hi Runaway J,

AFAIK it once had a non original reverb added by the European distributor before delivery to the customer and without the permission of Alexander Dumble. And AFAIK this drawing shows how - after removing the non original reverb - to add an original Dumble Big Tex Reverb and that the owner then would need a mono Dumbleator between the ODS and the Big Tex to do so.

Cheers,

Max

[Runaway J]

Seems the amp once had a built in d-lator that has been removed again (typical holes in the back + hole for another tube socket).
Also there’s HAD’s hand drawn explanation of how to add a d-lator to the signal chain.

Hi Runaway J,

AFAIK it once had a non original reverb added by the European distributor before delivery to the customer and without the permission of Alexander Dumble. And AFAIK this drawing shows how - after removing the non original reverb - to add an original Dumble Big Tex Reverb and that the owner then would need a mono Dumbleator between the ODS and the Big Tex to do so.

Cheers,

Max

Hi Max,
you're right, dumblelator + big tex reverb OR some other reverb device, as HAD writes.
Strange that the distributor added a one tube reverb to a completely new amp.
I thought it must have been a built in d-lator 'cause the new holes were positioned to the left
and the right of the preamp output jack, as if for send and return pots.
BTW is there anything known about the 'Big Tex Reverb'?

Cheers,
Jürgen

[ChrisM]

How do I zoom in?

[Runaway J]

I'm afraid you can't zoom, it' just a preview as an inducement to buy the paper

[Max]

Strange that the distributor added a one tube reverb to a completely new amp.

Hi Runaway J,

Because the original ODR was a lot more expensive than the ODS they probably thought it would be clever to offer a less expensive reverb solution - an ODS with an added reverb circuit. In the late 70ies Dumble amps haven't yet been collector's pieces but utility tools, so some of them, like #046, are no longer original now.

I thought it must have been a built in d-lator cause the new holes were positioned to the left and the right of the preamp output jack, as if for send and return pots.

AFAIR the hole on the right of the pre-out was the hole for the reverb pot. And the hole on the left of the pre-out was the power amp in of a loop insert, that was probably added by the distributor, too.

I don't have any precise information concerning the Big Tex. Perhaps someone else here?

Cheers,

Max

[dr. who]

[img:701:460]http://img526.imageshack.us/img526/9399/dumble1.jpg[/img]
[img:698:460]http://img695.imageshack.us/img695/8233/dumble2.jpg[/img]

[marcos]

Strange that the distributor added a one tube reverb to a completely new amp.

Hi Runaway J,

Because the original ODR was a lot more expensive than the ODS they probably thought it would be clever to offer a less expensive reverb solution - an ODS with an added reverb circuit. In the late 70ies Dumble amps haven't yet been collector's pieces but utility tools, so some of them, like #046, are no longer original now.


AFAIR the hole on the right of the pre-out was the hole for the reverb pot. And the hole on the left of the pre-out was the power amp in of a loop insert, that was probably added by the distributor, too.



Max

Hi Max and Runaway J,
yes the reverb added by Applied Acoustics was offered as a lower cost
alternative to the Overdrive Reverb. The price of the ODR
was DM 3500 vs the 2500 for the ODS, so they offered a "Boogie-style"
for 400 DM extra.They also claimed that the reverb was installed by HAD.
HAD once called this "unethical and unprofessional."
AFAIK there was at least one more amp with this type of reverb.
On #46 the reverb was removed, a loop was added later by Bernd Stephan of Steavens Amps in Cologne, later modded by Larry Grohmann
of Larry Amps. The loop was removed entirely in 2005.
That is the reason for all the holes.
Max is right, in the 80s Dumbles were not considered collectibles,
so only a few remain untouched.

Hope this helps Marcos