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

[Norman Ryan]

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
>>>
>>>______________________________________________________________
>>>R-390 
    mailing list
>>>Home: http://mailman.qth.net/mailman/listinfo/r-390
>>>Help: http://mailman.qth.net/mmfaq.htm
>>>Post: mailto:R-390 at mailman.qth.net
>>>
>>>This 
    list hosted by: http://www.qsl.net
>>>Please help support this email list: http://www.qsl.net/donate.html
>>>
>>>
>>>
>
>