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: [email protected] -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Alan Bloom Sent: Saturday, August 01, 2015 11:33 PM To: [email protected]; [email protected] 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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
