[Elecraft] Multiple sensors with P3 transmit monitor

[Alan Bloom]

Thanks.  Be sure to let us know what you come up with.

Alan


On 08/01/2015 11:09 PM, Dr. William J. Schmidt, II wrote:
> I'm working on something that is a little more 21st century-ish... something
> that is auto switching basis a little programming...  about $20 worth of
> stuff and it's god to go.
>
>
> Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
>
> Owner - Operator
> Big Signal Ranch - K9ZC
> Staunton, Illinois
>
> Owner - Operator
> Villa Grand Piton - J68HZ
> Soufriere, St. Lucia W.I.
> Rent it: www.VillaGrandPiton.com
>
> email:  bill at wjschmidt.com
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Alan
> Bloom
> Sent: Saturday, August 01, 2015 11:33 PM
> To: elecraft at mailman.qth.net; Elecraft_K3 at yahoogroups.com
> Subject: [Elecraft] Multiple sensors with P3 transmit monitor
>
> On 07/25/2015 07:11 PM, Alan Bloom wrote:
>> On 07/25/2015 01:01 PM, Dr. William J. Schmidt, II wrote:
>>> I suppose the next thing we'll need is an outboard box to switch 3 P3TX
>>> sensors automatically keyed off the ACC connector (amp off HF, amp on
>>> HF, 2 meter).  Hmmmm. I wonder if anyone else has thought about this?
>> You can buy manual RJ-45 switches on Amazon.  I just ordered one to try
>> out.  10 bucks plus shipping:
>>
>> http://www.amazon.com/Network-Output-Manual-Sharing-Switch/dp/B00AUB3SSA/
> This is a little box that has 4 pushbutton switches on the front that
> select one of four one RJ-45 connectors.  I received the unit a few days
> ago and finally got around to trying it.  It is quite small - about 4.7
> x 3.3 x 1.1 inches (11.9 x 8.4 x 2.8 cm).
>
> I have it connected with short Ethernet LAN cables to three sensors:
> 200W HF, 2000W HF and VHF.  The fourth position is "off".  It makes it
> quick and easy to select and de-select sensors for my testing.  The P3
> TX monitor automatically senses which type of sensor is connected and
> changes scale factors and calibration values as required.
>
> I took it apart to examine the innards.  Each of the four pushbuttons is
> ganged to two 4PST switches, so all 8 lines of the RJ-45 connectors are
> switched.  It appears well-constructed with a good-quality PC board.
> The chassis is thin sheet metal, but perfectly adequate for the purpose.
>    One odd feature is that the pushbuttons are labeled D through A, left
> to right.  They did that so the connectors on the rear panel come out in
> the more-logical A-D order.
>
> By the way, it should also work fine with a W2 if you want to be able to
> use more than two sensors.
>
> Alan N1AL