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

[Phil Mills]

My mistake.....I thought that the geneva gear was the
planetary gear assembly.....it is an R-390A.



----- Original Message ----- 
From: "rbethman" <rbethman at comcast.net>
To: <r-390 at mailman.qth.net>
Sent: Thursday, December 26, 2013 11:29 AM
Subject: Re: [R-390] Gear train rebuild help needed......


> 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
>>
>
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