[R-1051] R-1051

[Larry Kirkland]

Cecil,
I have the module out and opened up.  The bevel gear on the end of the 
motor shaft is loose.   It is safe to tighten the bevel gear and put 28 
vdc on the motor lead to test it?

Larry



Cecil Acuff wrote:

> It is tedious but the motor can be disassembled, cleaned, lubed and 
> reassembled.  I usually us an abrasive pencil eraser to polish the 
> comutator and spray degreaser to clean everything up.  There is a 
> gearbox on the top end that a few drops of synthetic oil should be 
> placed in where the motor shaft enters as well.
>
> That should fix your problems with tuning....
>
> Cecil....
> ----- Original Message ----- From: "Larry Kirkland" <lkirkland at sc.rr.com>
> To: "R-1051 Discussion Group" <r-1051 at mailman.qth.net>
> Sent: Monday, June 12, 2006 9:27 AM
> Subject: Re: [R-1051] R-1051
>
>
>> Cecil,
>> You are right about the other motor.  I cannot hear it running after 
>> the RF deck motor stops.  I will check it out and let you know.
>> 73's
>> Larry W4LK
>>
>> Cecil Acuff wrote:
>>
>>> The problem is you have a stalled motor in the Mhz synthesizer 
>>> module of the six pack.  There are two motorized things in the 
>>> radio...one the turret in the RF deck...easy enough to check...you 
>>> can watch it go round and round. The other is not so easy...it's a 
>>> motor driven crystal oscillator switch. If the motor stops you will 
>>> only get one band to function.
>>>
>>> When you tune the Mhz on the front panel in one direction the RF 
>>> deck moves only one step if you move the knob the other direction 
>>> the RF deck runs much longer to do a full rotation.  Turn the knob 
>>> the direction the direction that results in single steps and after 
>>> it stops you should hear the crystal switch motor running for a few 
>>> seconds after the RF decks stops.  If you don't hear it that 
>>> confirms the motor problem.  The only problems I have seen from code 
>>> generator is where the thing either stops on the wrong frequency or 
>>> won't stop the motors at all.  The code generator and encoder 
>>> switches in the Mhz module of the sixpak and the base of the RF deck 
>>> form open seeking circuits.  I've had one of the metal bushings that 
>>> separates the layers in the code generator short against a trace on 
>>> one of the circuit boards resulting in no right answer from the 
>>> encoders so it would just spin the motors until you turned it off or 
>>> selected the one frequency that shorted that trace anyway.
>>>
>>> I think your problem is a stalled motor....
>>>
>>> Good Luck
>>>
>>> Cecil...
>>> ----- Original Message ----- From: "Larry Kirkland" 
>>> <lkirkland at sc.rr.com>
>>> To: "R-1051 Discussion Group" <r-1051 at mailman.qth.net>
>>> Sent: Monday, June 12, 2006 8:32 AM
>>> Subject: [R-1051] R-1051
>>>
>>>
>>>> I have been working on a R-1051B here that I got recently.  It 
>>>> works only on the 4 MHz range.  The code generator switch A2A7 is 
>>>> putting out a tune relay ground on all ranges but the 4 MHz range.  
>>>> I have checked the other outputs of the code switch and they are 
>>>> correct.
>>>>
>>>> Is it advisable to disassemble the code generator to look for the 
>>>> fault? The manual says it is not field reparable and offers no 
>>>> other info about the device.
>>>>
>>>> Thanks,
>>>> Larry W4LK
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>>>
>>>
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