[Elecraft] K3 Locks up in Transmit in data mode.

[Stewart Bryant]

Joe

Spot on, many thanks for the advice.

73

Stewart

On 25/02/2015 23:11, Joe Subich, W4TV wrote:
>
>> The key factor in avoiding the hang (which happens in both DN780 and
>> FLdigi seems to be not sending audio with the CAT cable connected,
>> but the off-off setting should surely cause the CAT control lines to
>> be ignored, shouldn't it?
>
> It's not the CAT control (RTS-DTR) lines you need to worry about.
> It is sending TX ON and OX OFF commands via CAT that causes the
> problem.  *Either* use PTT via CAT COMMANDS *or* use the VOX in
> Signalink/K3 but don't use both.  It is when you mix CAT commands
> and external PTT or VOX that you get the "hang" problem.
>
> In DM780 you can use PTT on the DTR line *don't* use CAT commands.
> In Fldigi *do not* use "CAT command for PTT" - instead use "Toggle
> DTR for PTT".
>
> *Many* rigs appear to have a race condition in processing CAT based
> PTT commands and hardware (DTR) PTT.  I do not know the internals
> but it appears they ignore the hardware PTT while processing the CAT
> command and if the hardware PTT disappears at the wrong time the CAT
> TX OFF is ignored and then there is no hardware PTT off.  In almost
> every case simply "bumping" the PTT button on the mic will release
> the stuck PTT.
>
> 73,
>
>   ... Joe, W4TV
>
>
> On 2015-02-25 5:30 PM, Stewart Bryant wrote:
>> Hi Don
>>
>> Thanks for the reply.
>>
>> On 25/02/2015 22:23, Don Wilhelm wrote:
>>> Stewart,
>>>
>>> By saying you are "using VOX in Signalink to control PTT" are you
>>> saying that you are using the PTT output of Signalink to control
>>> transmission?  With a cable to the PTT jack?
>> Yes, that is how it is configured.
>>>
>>> You mentioned the "RS-232 cable" which makes me wonder which of the
>>> Signalink "Radio Cables" you are using.  I am going to assume you are
>>> using the SLUSBK3 cable which connects to the K3 reap panel audio
>>> jacks and the PTT jack.
>> Correct.
>>>
>>> If so, do you also have VOX set on in the K3.
>> No, I turned this off.
>>>
>>> This is a common problem if both Signalink PTT and the K3 VOX are
>>> active.  Unplug the PTT cable from the Signalink and just use the VOX
>>> in the K3, or turn off VOX in the K3 and use the PTT from Signalink -
>>> your choice, but do not use both.
>> The key factor in avoiding the hang (which happens in both DN780 and
>> FLdigi seems to be not sending audio with the CAT cable connected, but
>> the off-off setting should surely cause the CAT control lines to be
>> ignored, shouldn't it?
>>
>> 73
>>
>> Stewart/G3YSX
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> On 2/25/2015 4:35 PM, Stewart Bryant wrote:
>>>> Hi
>>>>
>>>> This is probably finger trouble, but I cannot see
>>>> what the problem is, so I wonder if anyone
>>>> knows what is going on.
>>>>
>>>> I have a K3, Sigalink and HRD/DM780.
>>>>
>>>> For voice and CW including using the winkeyer all
>>>> works fine including CAT.
>>>>
>>>> However I get a transmit lockup in data mode.
>>>>
>>>> I am using vox from the Sigalink to control the K3 PTT.
>>>>
>>>> I have K3 power turned to zero.
>>>>
>>>> I set the K3 in data mode and send some data and all is well
>>>> relays go over tries to send some data goes back to receive.
>>>>
>>>> If I plug in the RS232 cable and send some data all works
>>>> well, the Sigalink drops PTT, buy the K3 locks in
>>>> transmit and will not come out of transmit until I power
>>>> cycle the K3. Removing the RS232 cable has no effect unless
>>>> I power cycle the K3.
>>>>
>>>> Removing the RS232 cable and all works exactly as expected.
>>>>
>>>> I have configured ptt to off-off.
>>>>
>>>> Does anyone have any idea what I am doing wrong here?
>>>>
>>>> Many thanks
>>>>
>>>> Stewart/G3YSX
>>>>
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>>
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