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

[rbethman]

Group,

Let's find out if this is a R-390A or an R-390.

Phil wrote R-390A.  IF that is the case, there is NO green, Geneva Gear.

We can manage to scramble the messages, and confuse the information.

Bob - N0DGN

On 12/26/2013 11:52 AM, Norman Ryan wrote:
> Hi, again, Phil,
>
> So the geneva gear is fully intact, then?  Ball bearing where it should be?
>
> There is a possibility the gear(s) that engage it may be out of whack.  I can't remember exactly how they look, but IIRC, there is a fancy four-toothed pinion that may be mispositioned.
>
> I would see if a thorough eyeballing of that part of the gear train reveals the problem.
>
> Best of luck finding the solution.  Keep us posted.
>
> Best,
> Norman
>
>
>
>
> On Thursday, December 26, 2013 11:15 AM, Phil Mills <pmills7 at comcast.net> wrote:
>   
> Norm,  I did not take the geneva gear
> apart.  The gear
>> train was MC switching normally before I did the
> rebuild
>> which I had to do because it was badly out of sync
> cam
>> lobe wise.  The rebuild tutorial said nothing
> about having
>> to sync or position the geneva gear.
>>   
>> thanks for the reply, Phil
>>   
>> ----- Original Message -----
>>> From: Norman Ryan
>>> To: Phil Mills ; R-390
>>> Sent: Thursday, December 26, 2013 9:49  AM
>>> Subject: Re: [R-390] Gear train rebuild  help needed......
>>>
>>>
>>> Hi,  Phil,
>>>
>>> I wonder if the problem is in the geneva gear.  Might it be
>    missing its ball bearing?
>>> 73 de Norman, KG4SWM
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Thursday, December 26, 2013 9:41 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
>