[Elecraft] K4 Features and current K3+

[Bjorn Pehrson]

Jag försökte kasta om GPIO_IN_LOW="gpio18" till GPIO_IN_HIGH="gpio18" 
men det blev ingen skillnad så det verka inte vara svxlik som bråkar.

Å andra sidan är spänningarna rätt...

Mysko

On 2019-09-20 22:29, RALPH TURK wrote:
> I can not use the digital modes because I need to switch to Upper SB after the last
> electron has been sent in the digital mode and the reverse.  Call is instant break in
> between USB voice and digital M110 A
> This could be a deal breaker on a K4 purchase.
> Ralph, W7HSG/AFA9rt
>
>
>> On September 20, 2019 at 12:52 PM Jim Rhodes <jim at rhodesend.net> wrote:
>>
>>
>> That is the way my old TS-570 is but my K3 has only 1 ptt line, but if I am
>> not mistaken in digital modes the mic is muted. I am not sure of that since
>> I hardly ever have a mic plugged in, but I think that is what I read in the
>> book.
>>
>> Jim Rhodes
>> K0XU
>>
>> On Fri, Sep 20, 2019, 09:05 Andy Durbin <a.durbin at msn.com> wrote:
>>
>>> "I need to be able to switch from digital (M110A) to voice on a moments
>>> notice so can not use the digital modes.  The mike is hot while
>>> transmitting digital.  Most mikes leave the mike element hot.  The PTT is a
>>> SPST switch.  This means that you have to be careful not to have any noise
>>> in the shack while transmitting digital.  If there is a way on the K3,
>>> service was not able to point it out."
>>>
>>> It would be very surprising to me if K3 and K4 had such a limitation.
>>> This situation is handled perfectly in the Kenwood TS-590 by using 2
>>> distinct keying commands.   Front panel PTT is equivalent to CAT TX0; and
>>> takes modulation from the front panel mic jack.  TX1;  and the equivalent
>>> ACC hardware PTT, take modulation from the USB Audio CODEC or ACC analog
>>> audio input leaving the mic muted.
>>>
>>> Switching between front mic and digital is simply accomplished by
>>> asserting the appropriate PTT line or CAT command.  The digital mode
>>> application asserts TX1;  Keying mode cannot be changed while transmitting
>>> so first keying command wins until TX stops.
>>>
>>> 73,
>>> Andy, k3wyc
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