[Elecraft] K3/P3 - To watch own TX, what lines need to be disconnected?

[Radio Amateur N5GE]

On Tue, 19 Oct 2010 10:39:49 -0400, nr4c at widomaker.com wrote:

Alan,

Please don't add that functionality to production units.  

I don't want to pay the engineering cost or material costs that would
be required for something that 1% to 5% of the P3 users would use.
Make it an optional circuit board that with a relay that breaks the
connection that can be purchased and installed by those who want it.

73,

Tom, N5GE

K3 #806 with SUB RX, PR6, 
KRC2 and K144XV
K3 #1055 with PR6 and XV432
W1, 2 W2's and other small kits

QCWA Life Member 35102

n5ge at n5ge.com
http://www.n5ge.com
http://www.swotrc.net

>
>Alan,
>
>Thanks for the answer to my question.  That would be a simple accessory.
>
>Now to answer your question.  A lot depends on how your station is  
>setup.  If the radio is placed so it is very inconvienient to  
>disconnect the cable, it makes sense to add a switch.  And, there may  
>be times when you might want to look at the TX signal without actually  
>changing it.
>
>Since I saw the 'disconnect the cable' routine in the P3 manual on  
>line, I'll assume there is little possibility of damage to the K3/P3  
>by doing this.
>
>Since it can be useful, and the proceedure is documented, why not make  
>it a 'feature', not a 'work around'?  A relay in the P3 and some code  
>to configure a soft key, and maybe a modal to activate yes/no.
>
>I'm relatively new to the K3 and don't have a P3 yet.  But hope to in  
>a month or so.  I'd like this option.
>
>Thank you.
>
>...bc
>
>...bc
>
>
>Quoting Alan Bloom <n1al at cds1.net>:
>
>> The RS-232 cable between the P3 and the K3.  You could make a box with a
>> DPST switch or relay to open the TXD and RXD lines if you don't want to
>> unplug the cable.  On the other hand, how often do you adjust TX EQ?  It
>> would probably be easier just to unplug the cable than to build a switch
>> box.
>>
>> Alan N1AL
>>
>>
>> On Mon, 2010-10-18 at 17:42 -0400, Bill Conkling wrote:
>>> For those who want to use the P3 to adjust TX EQ, what lines need to be
>>> disconnected from the RS-232 circuit.  Should be easy to make a box with a
>>> switch to disable certain lines without having to disconnect the cable
>>> between the P3/K3.
>>>
>>>
>>>
>>> Maybe could be triggered by the "Key Out" signal, or just a simple toggle
>>> switch.
>>>
>>>
>>>
>>> Better still, add it to the P3, or offer it as a 'fungtion key'".
>>>
>>>
>>>
>>> ...bc
>>>
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>>
>>
>
>
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