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

[rbethman]

List,

Phil and I were off list yesterday.

Here is what he wrote:

> I appreciate your helping me.  I've received a lot of different
> suggestions and none of them are the perfect solution to say
> the least.
> Part of the problem is that the manual picture of the "geneva"
> gear or "planetary gear" as I would call it or the "segmented
> gear" as others have named it does not match the gear that is
> shown in the maintenance manual.  It looks exactly like the planetary 
> gear that is shown in the www.militaryradio.com rebuild
> tutorial.   I'm going to go search the Y2K manual
> to see if it shows something that looks like what really exists
> in my receiver.
> At this point, I've just about decided to strip the gear set down and 
> start all over again and just maybe I can find out where
> I left off a bushing.., 
So he is looking very hard at the entire gear assembly.

It is indeed very easy to get a washer or spacer in the wrong place.

Bob - N0DGN


On 12/27/2013 10:49 PM, Ken Harpur wrote:
> 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
>
>