URM-25D Repairs            


Worked fine except for the 400 and 1000 cps tone and the external modulation weren't working.  Advice was to get rid of the old mica-molds in the audio compartment assembly.  The following Hollowstate articles were helpful (thanks to Al, W8UT for the pointer).

I also replaced C170 across the Ext.mod in / audio out BNC.

The operation was a success.

Getting Ready

In the middle of having fun

All done and enjoying it playing old tunes through the SX-16