[Elecraft] Made a DB15 cable to connect K3 + KAT500, but now Amp is disabled

[iain macdonnell - N6ML]

On Thu, Aug 29, 2013 at 2:37 PM, zl2ke <zl2ke.steve at gmail.com> wrote:
> On 30/08/2013 9:21 a.m., Iain MacDonnell - N6ML-2 [via Elecraft] wrote:
>>
>> That seems to suggest that your custom cable is defective - maybe it's
>> shorting the keying line (pin 10) to something else and interfering
>> with the K3's key output.
>
> The cable is not defective - I checked continuity carefully.

If two pins are shorted together (solder bridge), a pin-for-pin
continuity test would not reveal it.


>> Just to be sure .... you have *both* RCA cables in place through all
>> of these scenarios, right?
> Yes, both RCA cables are in place, as before I made the new cable.

If that's the case, and it stops working when you connect your custom
cable (and don't change anything else), there has to be something
wrong with the custom cable. I suppose it's remotely possible that
there's a defect in the KAT500 that's shorting the keying line to
something, but that seems much less likely than a problem in the
cable.

You could actually just remove pin 10 from your custom cable entirely.
You don't need it, since you're leaving the RCA cables in place.

73,

    ~iain / N6ML