Jan,
OK Got it. No additional suggestions right now.
Bob
K8MLM
In a message dated 3/2/2011 10:22:54 P.M. Eastern Standard Time,
ditzian@windstream.net writes:
Bob,
The relay which seems not to work is K5, the vacuum relay. I have ordered
one. The problem is that, as I check continuity, none of the poles are
connected to each other. This means that the SPDT relay is actually a 0PDT
(no pol, double throw) relay. I think this is the problem. If you look at
the schematic, which appears to be in the state of amp standby or off, if
nothing is connected to anything at K5, then the HF input goes nowhere.
This is exactly what happens: with the amp off, exciter connected to amp
input, dummy load connected to amp output, I have high swr on the exciter.
With
this configuration, the exciter should be looking at the dummy load, and
the amp should be passing it through. K4 would normally be open at this
point anyway, so I did not try to figure out what it did. I believe that K5,
which I think is the QSK T/R switch, not only does not switch, it is
completely burned out, so it does not even pass anything in the off position.
Jan, KX2A
On 03/02/2011 09:37 PM, _K8MLM@aol.com_ (mailto:K8MLM@aol.com) wrote:
Jan,
You were talking about an input relay in line #4 of your 2/28 e-mail. The
relay you are describing is K5, a vacuum relay, and is a SPDT output
relay. The input relay, K4, a SPST is a reed relay. Mine is tubular and
yellow. I think you are looking at the wrong device. Something doesn't seem
right.
Bob
K8MLM
In a message dated 3/2/2011 12:07:56 P.M. Eastern Standard Time,
_ditzian@windstream.net_ (mailto:ditzian@windstream.net) writes:
I tried to operate the relay from a 24 VDC supply, but all I ever got
was a spark. No relay sound or indication that the relay had operated.
I ordered a replacement HC-1 24 volt relay from Max Gain systems.
It looks like this going to be a project to remove and replace. Has
anyone done this? I would like to know if the relay must be unscrewed
and removed from the top. If so, then I must unsolder the bottom
connections, the operating poles, from the bottom through the hole in
the circuit board that is over the relay when viewed from the bottom.
Is the panel tapped, or is there an anchored nut, or is the nut free, so
that I have to hold it with something on the bottom when unscrewing it
from the top?
Any other suggestions about this replacement are welcome.
Jan, KX2A
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