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

[Barry Scott]

Please disregard that message.  There's an oscillator sub-chassis for sale
on eBay at the moment and I can see where that cover wraps around the
entire side of the other part of the sub-chassis so it couldn't be lifted
out that way.  Also, there are two screws on the inside of the bottom that
can't be removed without removing the entire sub-chassis.

My 10.5 MHz crystal is running a bit high and I have another one I'd like
to try but that's probably more work than I want to do just to test it out.

Thanks,
Barry - N4BUQ


On Sat, Sep 28, 2024 at 12:49 PM Barry Scott <72volkswagon at gmail.com> wrote:

> 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
>