[R-1051] R-1051 capacitors

[Geoff Fors]

The tubular electrolytic capacitors in the R-1051's are all getting rather 
old.  It's a good idea to run through all those axial lead jobs on the 
boards under the chassis with an ESR meter and replace the dried up ones.

I have decided the R-1051 is one receiver where it only makes sense to have 
two of them in good working order.  That way when one breaks down you can 
swap modules to pinpoint the issue.  Otherwise it's rather frustrating, 
since it wasn't designed to be troubleshot to the component level in the 
field.  Not many of us have the module test fixtures or the full set of 
extender cables.

I don't know whether the earlier messages from years ago are still 
searchable via the system, but some problems which were common include the 
inserts falling out of the connectors on the chassis, motorized switches 
inside the modules which failed to function or synch up correctly, and 
mainly, almost endless issues with the six-pack module.  The tubes in the 
turret module have always been utterly flat in the receivers I have gone 
through.  You mileage may vary.

The power transformers can have a high voltage short to the case which may 
or may not blow fuses.  If this happens to you, post a message back here and 
I will explain how to repair 99% of these even though it's a sealed 
transformer.

The RF (antenna) overload/protect board has caused some "no reception" 
issues for me in the past.

The general rule seems to be to start troubleshooting at the frequency 
standard and work your way out from there.  First timers should make sure 
the reference oscillator switch is set to "INT" as many of these receivers 
were used on board ships and at stations where they were slaved to a master 
oscillator/standard.

Trivia - the interlock is defeated by pulling up and slightly sideways on 
the white plastic "shoe" piece attached to the switch.

Geoff
WB6NVH