[Elecraft] K4 Features and current K3+

[Bjorn Pehrson]

sorry abt that. wrong list..


On 2019-09-20 22:38, Bjorn Pehrson wrote:
> 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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