Archive of the former Yahoo!Groups mailing list: Mellotronists

 

john barrick wrote:

Thanks Jerry and Doug.  The first Tron I lookedat, 1210 (or whatever
the one Bruce Daily now owns is) had the original mounting configuration
of brackets at bottom and wood shims on the sides of the spill box.
1407 has no evidence of the box ever having had bottom mounting brackets
- there are no holes (or interior recesses) for either bolts or screws
anywhere on the bottom or lower portions of the sides - it appearsthis
box has always been mounted at the top - in fact, the holes that the
bracket bolts screw into on the top of the frame are threaded, which
makes the mounting scheme seem a bit more planned and less of a retrofit
in New Jersey.

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Hi Guys,  Yep, engineering/design changes to M400 internals
occured around #1234. That's why  #1210 was orig.and #1407was
new config.

That said, spill box cover on 1407 was designed for top mounting
only. Wooden side boards on 1407 are also thicker and more rigid.

The sad thing is that Sound Sales/Dallas attempted to incorporate
later M400 assembly into older units. Hence, the missing brackets,
wobbly board/motors, sagging frames, etc.  Calling it "upgrade",
it was reverse-engeering of the worst possible kind.

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If this is the case, is there any point to adding bottom mounting
brackets (I've already cut and drilled them and was looking forwardto
putting them on)?  I can see that it could help add extra stabilityto
the frame, but it doesn't appear to have been suffering any of the
problems Jerry describes, except for the sagging motor which was
remedied by tightening up the motor mount bolts.  The L channelaluminum
I bought is about three times as thick as the original brackets, soit
certainly wouldn't allow for much movement once installed.  Theonly
reason that I used machine screws was because Home Despot didn't have
small enough diameter carriage bolts to match what was already being
used to mount the upper brackets.    best,  - eljohnno

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Definitely at your discretion, John.  1407 will only benefitfrom
further strengthing.  Make certain the wooden board that supports
the motor is rock-solid. I usually remove the 4 wood screws and
thru bolt the wooden board to alum "L" channel frame.

Attach some pix for us to see, John.  Will prob. be identicalto #1332
which I refurbed here at the M-Ranch spring-2006.

Cheers, -- Jerry Korb (enjoyed some  yummy   Fowler'sMill pancakes)