[Elecraft] Feature request - Disable Break In on K3

[Don Wilhelm]

Mike,

I cannot remember all the details in the original discussions, but I am 
"with you"..  I was outvoted.

OTOH, if one is using KEYOUT to initiate the sequencer, if KEYOUT does 
not become active until PTT is asserted, then there is a "cause and 
effect" problem - the sequencer will not start until PTT is asserted 
(because it is started with the KEYOUT signal) and further delays 
(requiring the use of TX INH) will be introduced.

The solution is to start the sequencer with the onset of PTT (from the 
PTT footswitch or other switch) rather than using the K3 KEYOUT, and use 
TX INH to inhibit RF until the sequencer completes its cycle.

That solution eliminates the "chattering relays" situation, and does not 
cause other problems.

73,
Don W3FPR

On 8/27/2013 6:52 PM, Mike Harris wrote:
> It would be interesting to learn under what practical circumstances 
> someone might offer that the current arrangement is a desired mode.  I 
> can't think of any, however, that could just be lack of imagination on 
> my part.
>
> Until convinced otherwise my vote is with N6ML.  CW mode, VOX off, no 
> PTT = no Key Out.
>
> Regards,
>
> Mike VP8NO
>
> On 27/08/2013 19:19, iain macdonnell - N6ML wrote:
>> It does seem a bit lame that KEY OUT is activated when the K3 is not
>> transmitting. Maybe there should be an (optional) mode where the CW
>> key inputs (including memory) are completely ignored when VOX is off
>> and PTT is not asserted......
>>
>> 73,
>>
>>      ~iain / N6ML
>>
>>
>>
>> On Tue, Aug 27, 2013 at 3:13 PM, Don Wilhelm <w3fpr at embarqmail.com> 
>> wrote:
>>> Mike,
>>>
>>> I think you mean Keyout rather than PTT -- PTT is an input signal to 
>>> the K3
>>> generated by an external device such as a footswitch..
>>>
>>> The use of TX INH does not prevent the Keyout signal from activating 
>>> - it
>>> should click the relays and start your sequencer.  BUT it does 
>>> prevent RF
>>> from being transmitted which will protect your preamps and other 
>>> things that
>>> need to be protected during the sequencer time.
>>> A typical sequencer will complete its cycle in a few tens of 
>>> milliseconds.
>>> If you don't like the Keyout state changing with keying, use 
>>> semi-break-in
>>> and set the delay to whatever time period you desire to keep the Keyout
>>> active between characters, words, etc. - that time will depend on your
>>> keying speed..
>>>
>>> 73,
>>> Don W3FPR
>>>
>>>
>>> On 8/27/2013 5:44 PM, AD6XY wrote:
>>>>
>>>> Hi Don,
>>>>
>>>> That doesn't work too well because the PTT signal still bounces up and
>>>> down
>>>> setting off all the relays. My IC735 used to have a VOX delay which 
>>>> you
>>>> could set to something long to prevent that - but unless I missed a 
>>>> menu I
>>>> can't seem to find where you set the CW VOX hang time.
>>>>
>>>> Mike
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