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

[Dick Dievendorff]

I think the key might be to remove pin 10 from the K3 end of the cable.  I
suspect something in the cable might affect the K3's RCA PTT connection,
either pulling it down full time or holding it up.  I'm just guessing.  I
don't question that the cable has continuity pin to pin.  I wonder what pins
might have continuity to each other.

Dick, K6KR


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of iain macdonnell -
N6ML
Sent: Thursday, August 29, 2013 18:43 PM
To: don at w3fpr.com
Cc: Elecraft Reflector; zl2ke
Subject: Re: [Elecraft] Made a DB15 cable to connect K3 + KAT500, but now
Amp is disabled

It really shouldn't be necessary to remove pin 10 - it should get as far as
the relay in the KAT500, and be left dangling there (not connected to
anything else). It really shouldn't do any harm. I still think it may be
shorted to something else, or there's some other factor at play here that we
haven't thought of yet. It would be interesting to see if removing pin 10
does solve the problem, but I'd still wonder why....

73,

    ~iain / N6ML


On Thu, Aug 29, 2013 at 5:46 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
> Steve,
>
> Dick's solution will work, but removing the conductor on pin 10 if 
> your cable is an easier solution.
>
> What Dick is saying is that you are using both the pin 10 connection 
> and the RCA cable PTT connection between the K3 and the KAT500.  I 
> believe your problem results from attempting to use both.  Since the 
> cable pin 10 will not activate the RCA cable between the KAT500 and 
> your amplifier, removing the pin 10 signal from your cable seems to be 
> the only reasonable alternative.
>
> 73,
> Don W3FPR
>
>
> On 8/29/2013 6:01 PM, zl2ke wrote:
>>
>> There seems to be two possible solutions for my amp-disabled problem:
>>
>> 1.  Remove the wire to pin #10 from my homebrew cable, and still use the
>>       RCA cable from the KAT500 to the SB220 amp.
>>
>> 2.  Make a new cable from the SB220 to the 15 socket on the back of
>>       the KAT500 marked "AMP", using pin #10 for the centre conductor 
>> of the
>>       RCA cable and pin #5 to the shield/ground of the RCA cable.
>>       (Suggested by Dick K6KR.)
>>
>> Iain, your suggestion of removing the wire to pin #10 is the easiest 
>> option for me, but I will wait a bit to see what others say
>>
>> 73,  Steve   ZL2KE
>>
>>
>>
>> --
>> View this message in context:
>> http://elecraft.365791.n2.nabble.com/Made-a-DB15-cable-to-connect-K3-
>> KAT500-but-now-Amp-is-disabled-tp7578367p7578393.html
>> Sent from the Elecraft mailing list archive at Nabble.com.
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net Please help support this 
>> email list: http://www.qsl.net/donate.html
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html