[R-1051] R-1051

[Cecil Acuff]

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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