Note: I originally sent this reply to K9YC only, forgetting that's how this reflector is configured. Following is my reply, in case anyone is playing along.
73, Ken, KJ9B -----Original Message----- From: [email protected] <[email protected]> Sent: Tuesday, August 29, 2023 10:55 PM To: [email protected] Subject: RE: [Elecraft] Interesting observations after installing antenna switch Thanks for the reply, Jim. However, I never said the amp was throwing an alarm. It hasn't sounded an alarm since I was inadvertently trying to work 10 meters on an OCFD tuned for 40! For the record, I use a SteppIR 3 el. for 6 through 20 and an 80 meter OCFD through an LDG AT-1000Pro tuner for everything below 20. I will read up on the KRC2 some more. 73, Ken, KJ9B -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Jim Brown Sent: Tuesday, August 29, 2023 5:49 PM To: [email protected] Subject: Re: [Elecraft] Interesting observations after installing antenna switch On 8/29/2023 11:58 AM, [email protected] wrote: > The designer of the switch says that each band data channel only draws > around 4 mA, with each channel buffered by a transistor switch in an > attempt to isolate the band data voltage from the radio. In my > working days in the entertainment industry, I would use a distribution > amp to give me multiple audio outputs when needed. Is there such a > "distribution amp" available for the band data signals? Would the Elecraft KRC2 accomplish this? There are multiple formats for band data. I suspect that the one used by your switch is one that is not compatible with Elecraft's. It's been a while since I worked with the KRC2 that's in W6GJB's contesting trailer, but I think I remember that it can be set for all of the common band data formats. I suggest studying the manual for the KRC2 -- most if not all Elecraft manuals are on their website. Your KPA500 is probably throwing an alarm because it's not being band-switched. However -- I've never sent band data to my Elecraft amps or tuners -- all it takes is a single dit or tap on the mic for them to detect frequency and switch on their own. I don't see mention of a tuner, so I suspect all of your antennas are reasonably matched to coax. If not, remember that any transmission line transforms any mismatched load to some different complex impedance (that is, resistance and reactance), depending on its length. So if line lengths changed as a result of the switch, it could change that impedance, and some impedances with the same VSWR look different to the transmitter than others. 73, Jim K9YC ______________________________________________________________ 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]
