[R-390] 390/390a gear train

[Dan Merz]

 Hi,  the comments on reproducing the 390a radio raised a question in my
mind.  Does anyone have a dimensional drawing of the gear train in either
the 390 or 390a?  I'm interested in the dimensional layout/number of teeth
of the gears in these radios.  I have seen some of the drawings in the
manual,  Y2K and otherwise but I don't recall seeing anything that showed
number of teeth, and placement of the gears dimensionally.  I would like to
attempt making a computer-displayed simulation of gear movement, cams, and
cores,  and the placement of gears would be useful. Or even a list of gears,
size, number of teeth.  I hate to have to take my radios apart to figure all
this out.  Any help will be appreciated finding the best available info on
this aspect of the two radios,  Dan.

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Flowertime01 at wmconnect.com
Sent: Tuesday, December 13, 2005 3:28 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] A (very) big project

Mark,

We may not have to start with the whole thing.

Hank has done some covers already.
There is a need for some big knobs to be die cast.
Some mechanical filters packaged to a form that would fit the R390A IF deck
would likely be a paying project.
Front panel in designer colors and texture look to be selling well.

Some have though that printed circuit board may be in order.
As in Audio decks with a form of plug and play into the R390A chassis but
with solid state audio parts.  The IF deck would be next with a real product
detector. 

Some other things have come to mind.
As the last stage some new chassis and wire harness could be assembled to go
with all the available subassemblies.

Roger KC6TRU



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