[R-390] Kilocycle knob moves megacycle change knob

[Barry]

It's been a while since I had one open, but I'm pretty sure there's a spring-loaded detent that's supposed to lock the MGC shaft/knob at each position.  Perhaps that's not working correctly?

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "Dan Merz" <mdmerz at frontier.com>
> To: r-390 at mailman.qth.net
> Sent: Monday, April 3, 2017 1:58:41 PM
> Subject: [R-390] Kilocycle knob moves megacycle change knob
> 
> Hi, my 390a has symptom that moving the kilocycle knob also moves the
> megacycle change knob. I haven't explored yet but it seems megacycle knob
> itself is "gummy" and not working right so I haven't forced it much. This
> receiver hasn't been used much in last 10 years but was working smoothly
> probably a year ago. And had been cleaned and lubed with synthetic oil,
> maybe 15 years ago. I suspect some shaft is sticking to cause this odd
> symptom.  Where to look first?
> 
> Sent from my iPad Air2
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