[R-390] R-390 Antenna Relay Chatter

[Barry]

After replacing the selenium rectifier with a full-wave silicon bridge, the antenna relay is no longer chattering.  Truthfully, I'm not certain the chattering was the old rectifier and was, more likely, a failing FL101; however, now that I can power up around FL101, the antenna relay still gives off a distinct buzzing sound.  Since it's being fed a rippled 120Hz DC, is that expected?

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "n4buq" <n4buq at knology.net>
> To: "R-390 Mailing List" <r-390 at mailman.qth.net>
> Sent: Friday, October 7, 2022 11:59:10 AM
> Subject: R-390 Antenna Relay Chatter

> When in STANDBY, the antenna relay in my R-390 produces a bit of chatter.  Is
> this normal?  I see where that relay is fed, unfiltered, from CR801 which, from
> the pictures in the manual, appear to be a stack of selenium diodes and I'm
> wondering if that rectifier stack might be a problem.  Anyone know what to
> expect from that relay in STANDBY and, perhaps, what I'm seeing might be
> normal?
> 
> Thanks,
> Barry - N4BUQ