[R-390] Gear train rebuild help needed......

[Ken Harpur]

Phil,

It certainly sounds like the Geneva drive could be mis-aligned with the bandswitch. In your Y2K manual, assuming you have it (if not it is freely downloadable) chapter six, page 8 in the 'Corrective Maintenance' section there is a drawing showing the correct setting the the Geneva Drive at 7+000 MC note that it is called "Intermittent Switch Drive" in this Manual. Also, in the rebuilt instructions you followed at   http://militaryradio.com/r390a-rfdeck-geartrain.html 
Scott makes mention of the correct setting of the Geneva drive and describes how to adjust it further down the page. 

Regards,
Ken


On 27/12/2013, at 12:41 AM, Phil Mills <pmills7 at comcast.net> wrote:

> I have put my R-390A's gear train back together using the
> tutorial on www.militaryradio.com but have one problem.
> 
> I have everything lined up on megacycle position 7+000
> so that the cam lobes are aligned, the xtal deck is in the
> correct position, and the bandswitch itself is in the correct
> position.  However, something is out of whack in that
> the bandswitch does not rotate in going from megacycle
> position 7 to position 8 as it should.  It seems to be around
> megacycle position 14 that the bandswitch finally rotates.
> What do I need to do to get it back in sync?
> 
> thanks, Phil   W5BVB
> 
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