I took it apart and tested the relays individually with an ohmmeter. The
HI-G d'Italia relay was the problem, as several of you suggested. I
replaced it, cursing the engineers that had made it so hard to do, until
I remembered that I was the "engineer" responsible for it. Checked
everything for continuity and relay operation and it seemed OK, so I
buttoned it all up again.
But I forgot to check for shorts to ground. So tomorrow morning I'll
have to take it apart again and find what I screwed up. Not tonight.
73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
On 8 Jan 2017 18:10, Steve Thompson wrote:
If there's enough cable length between the relays in the rx path, a
TDR might do it.
I feel sure there should be a way using a capacitance meter, but I
haven't stopped to figure out how yet.
Steve
I have recently been suffering from intermittent attenuation of RX
signals
through my amplifier, which has a vacuum relay (Jennings RJ1-A) in
the output
and a HG d'Italia relay from max gain (see here:
https://www.mgs4u.com/RF-Microwave/RFrelays_misc.htm) in the input.
The problem
is that I would like to determine which relay is responsible before
taking it
apart!
I can't think of a way, and am considering replacing both of them.
Does anyone
have an idea?
Also, has anyone experience with the HG d'Italia relays? I wonder if
this was
such a good choice. It is fast enough, but I wonder about its lifespan.
Vic 4X6GP
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