[R-390] R-390 Antenna Relay Chatter

[Bob kb8tq]

Hi

Given that anything below 1A is a dirt cheap “modern” diode and
that you have two of them sharing the load …. not a big deal. The 
cheapest of the cheap should do the job.

Bob

> On Oct 8, 2022, at 6:00 PM, Barry <n4buq at knology.net> wrote:
> 
> From what I can find in the manual, the relay's coil resistance is 17 ohms the 26.2VAC winding is center tapped.  If that's the case, then that relay pulls about 0.74A.  Is that correct?  It seems excessive but maybe not.  I'm just wanting to make sure the bridge I get is rated properly.
> 
> 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
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