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

[Barry]

Hi Gary,

I think you may be describing the oscillator in the R-390A/URR.  The oscillator in the R-390/URR is different.  Thanks, though, for the reply. 

Barry - N4BUQ

> On Sep 28, 2024, at 2:42 PM, gary.biasini at shaw.ca wrote:
> 
> Barry,
> 
> Two screws in front of cover - easily accessible. 2 screws on back of cover - accessible through 2 holes on back panel. Not that much work.
> 
> Gary I. Biasini
> ________________________________
> From: Barry Scott <r-390-bounces at mailman.qth.net> on behalf of Barry Scott <72volkswagon at gmail.com>
> Sent: Saturday, September 28, 2024 12:19:50 PM
> To: R-390 Mailing List <r-390 at mailman.qth.net>
> Subject: Re: [R-390] Accessing Crystals in an R-390/URR
> 
> 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
>> 
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