[R-390] R-390/URR Geneva Mechanism needed

Al Parker anchor at ec.rr.com
Wed Oct 12 15:54:35 EDT 2005


Hi folks,
    I have discovered, much to my chagrin, that the Geneva Mechanism is
different in the R-390 and the R-390A -- they are mirror images of each
other.
    My R-390 has a stripped large brass gear on it's G-mech.  I helpful
friend and list member has supplied a mechanism for an R-390A, and I first
thought that the brass gears were the same.  They are not, the indexing
pin is placed one tooth away from being 180 degrees from the notch that
the ball fits in, in opposite directions for each unit.  (the other parts
are also mirror images.)
    I may be able to drill a new hole & relocate the pin, but it's only 8
degrees difference, and not having an indexing head for the drill press I
may mess it up.
    So, does anyone have, for the R-390, a complete Geneva Mechanism, or
just the brass gear, that they would sell me?
    You can see pix and more of the gory details of all this at:
http://www.thecompendium.net/radio/R390sn385.htm

thanks & 73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
http://www.hammarlund.info



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