On Tue, 2008-02-05 at 16:47 -0800, Jim Brown K9YC wrote:
> Hi Guys,
>
> I'm troubleshooting a "stuttering" keying problem on one of my 425s.
> I suspect a relay problem -- K3, K4, or K6. Vacuum relay is fairly
> new Gigavac, replaced last summer, and it's been through several
> contests. I have three of these amps, so I traded the 81218 board
> (that has K6 on it) from one amp to another. Didn't fix it. Then I
> changed K3. Didn't fix it.
>
> While pulling the 81219 board to change K3, the coax jumper from it
> to the Input LPF board came loose from the Input LPF board. My
> question is about that jumper, which appears to be one of those micro
> plug and socket connections, but which I don't think I've been able
> to seat reliably. Am I right that it is a plug and socket? The tip of
> the "plug" is bare center conductor of the mini-coax (RG174 or
> equiv), no tip on it. Is there a trick to latching it? Has the tip
> come off and I've lost it?
There was a tip. Shield with fins like a rocket? You need a new cable.
>
> Or does the board need to be pulled and the connection soldered?
> This board could be rather tricky to pull and replace -- it's got the
> input bandswitch on it, and at least two of the screws look real
> tough to get in and out.
>
> 73,
>
> Jim K9YC
>
>
73, Jerry, K0CQ
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