On 2019-05-20,
lapsteel77@gmail.com <
lapsteel77@gmail.com> wrote:
On Saturday, May 18, 2019 at 1:23:32 PM UTC-5, lapst...@gmail.com wrote:
I'm looking for any info about Lesmann Echo Amps. They were built in
the 60's for use with the Lesmann accordian. I am in the process of
trying to restore one and am having little luck finding anything about
them anywhere.
Thank You
Thanks Don
What I really need is info on how this beast hooks up to another amp
or accordian. It is like no other amp i've seen. There is no input jack
of any kind. Not the six pin jack like the Lesmann organ amp or any 1/4" jacks like other amps.
O.K.
There is a hole on the bottom of the chassis and inside it looks like
some wiring was cut out there.
Hmm ... likely had a connector on the bottom to connect to
whatever it sat on. Perhaps it was the accordion itself, or perhaps on
a speaker box.
I'm hoping some oldtimer like me saw or used one of these back in the
day and could clue me in to its use and hook up. There is NO info
anywhere on the net that I can find so this must be a real rarity even
for a Lesmann.
I did see one find offering ways to convert such to act as a
guitar amp -- it might have enough information to help you.
Oops -- it was an offer to sell one, not how to modify one:
<
https://reverb.com/item/994148-vintage-1960-lesmann-accordio-organ-25w-1x15-tube-combo-amp-tweed-killer>
It is already sold -- but if you scroll down a bit, you get an
image of it -- and a bunch of others which show various things about it.
Do these look like what you have? From the photos -- there is a phone
jack on the front panel at one end for inputs. And I guess that it
connects to the speaker under it via the hole with cut wires, which was
likely a multi-pin connector.
O.K. -- forth photo in the row of thumbnails below the main
image. Looks like (from the left to the right):
======================================================================
Fuse holder
Power switch
Pilot light
five pots (likely two gain for two inputs, tone controls, and perhaps
echo level)
two phone jacks for inputs
multi-pin connector for outputs to speaker (at a guess, a four pin round
jones plug
======================================================================
The metal cover to the left of the three transformers likely
covers a reverb spring for the "echo" effect. (in the 6th photo)
Do the cut off wire go to the transformer just to the right of
the reverb cover? I think that is the output transformer, so those
would be speaker connections.
Hmm ...also one more phone jack between and below the middle two
7-pin miniature tubes, and two more connectors between the power output
tubes. (Maybe those are the connections for the speaker in the box. if
so, the multi-pin connector may carry power to the electronic accordion.
In that case, they would be a low voltage for the filaments in the tubes
(6.3V or 12.6V likely) and a higher voltage for the plates of the tubes
in the accordion -- like 140 to 180 VDC
While I'm a bit of an old-timer (78 currently), I was not an
accordion player -- but rather an English Concertina player (one of the
reasons this is rec.music.makers.squeezebox -- it was formed to be
friendly to all bellows-driven instrument players -- and only after it
was formed did we discover that some accordion players objected to the
term "squeezebox". :-)
Thanks again for your help!
Dave
I hope that this helps a little. We've run out of what I think
I can determine (or guess) from the photos and what I know of old tube electronics.
Good Luck,
DoN.
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