Rick, that is my impression as well, you need a USB relay of sorts.
Will wait a little longer for this to stick before I buy the MFJ1234.

De Frank KG9H


> On May 27, 2019, at 1:25 PM, Rick WA6NHC <[email protected]> wrote:
> 
> That's because the K3(S) does not have a power ON command, you have to tickle 
> one of the ACC lines (pin 8 from memory, but check).  When it's powered down, 
> very little is actually running internally.
> 
> I use a USB relay for this purpose (attached to the station computer) for 
> remote ops.
> 
> I've asked (SEVERAL times) for the internal timer to be made 'sticky' so it 
> can turn on the radio not just once, but once a day as a last resort method.
> 
> Rick nhc
> 
> 
> On 5/27/2019 11:11 AM, lmarion wrote:
>> I just tried it on the K3S, it was on, the POWER OFF key turned it off. Hit 
>> the POWER ON key and it came back POWER ON FAILED TRY AGAIN. That may be I 
>> don’t have something set correctly. So Far all of the function keys have 
>> worked.
>> 
>> 
>> From: Frank Krozel
>> Sent: Monday, May 27, 2019 11:52 AM
>> To: lmarion
>> Cc: Elecraft Reflector
>> Subject: Re: [Elecraft] MFJ1234
>> 
>> Curious, does this also turn the radio on and off on either of those?
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> Sincerely,  Frank Krozel t: 1-630-924-1600 [email protected]
>> BSEE,   AASEET,   FCC Lic.# PG-18-19178,   KG9H
>> Electronic Instrument Associates - Central, Inc. ...since 1971
>> w: www.electronicinstrument.com  d/l our linecard at 
>> http://www.electronicinstrument.com/lc.pdf
>> 
>> 
>> On May 27, 2019, at 10:23 AM, lmarion <[email protected]> wrote:
>> 
>> 
>>   If you get the RigPi make sure you order from MFJ so you can get a correct 
>> cable for the K3s and a different one for KX3.
>>   Its being sold as a “complete kit, all you need is your rig”, by some. Not 
>> true.
>>   Also be aware its pretty much plug and play on my Apple tablet. Windows 
>> takes several other software additions and settings, you know the drill.
>>   Have not tried android.
>> 
>>   Not a K4 by any stretch but monitors the K3S  smoothly on my Ipad and 
>> Iphone.
>> 
>>   Leroy  ab7ce
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