[R-390] Accessing Crystals in an R-390/URR

Barry Scott 72volkswagon at gmail.com
Sat Sep 28 13:49:43 EDT 2024


Is it possible to access the crystals in the crystal oscillator chassis
without removing the entire oscillator sub-chassis?  I've had that
sub-chassis out but didn't pay much attention to the crystals and how they
might be accessed while still in the radio.

I see four screws accessible from the right side of the main frame and two
screws at the top that are accessible from inside the left-top cover of the
crystal oscillator.  If those are removed, can the cover be slid up and out
or is it necessary to pull the entire sub-chassis?  If it can be removed
that way, then are the crystals located such that they can be changed out?

Thanks,
Barry - N4BUQ


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