This video answers the question – “Can an antenna switch be used in reverse, to switch multiple radios into a single antenna system and, is it safe?” The answer is – YES, in most cases – as long as the switch grounds the unused inputs, which is usually the case. The video takes a look at the numbers, describes how much isolation is needed, and then shows how to measure the isolation using a NanoVNA, and finally shows the results using a couple of HF radios.
This example is installed at KJ4AJG and is a 4el for 28MHz. Tom is so impressed, he has ordered another to stack! If you don’t see one for a ban… Read more
Introduction and Background This is an experimental project that may lead to further development in the future, but even as presented below, it does w… Read more
“Join us for a webinar on Feb 16, 2017 at 9:00 PM EST Register now! – https://attendee.gotowebinar.com/register/7735767269616129539 JC N4I… Read more
What this lad has done with this screen for the 817 is astounding. CAT, CW decoder, waterfall, frequency readout, audio filter and audio recording. Wh… Read more
“” “The SteppIR CrankIR is portable a vertical HF and 2 meter antenna, it’s lightweight, high performance, extremely portable… Read more
Today we take a look at the Xiegu XPA125B QRP Amplifier and Auto Tuner hooked up to the Icom IC-705. This amp will work with a variety of QRP rigs inc… Read more
MFJ-269C Covers 530 KHz-230 MHz and 415-470 MHz . . . SWR . . . Complex RFImpedance: Resistance(R) and Reactance(X) or Magnitude(Z) and Phase(degrees)… Read more
The post Safely using a coax switch to connect multiple rigs to a single antenna system appeared first on QRZ NOW – Ham Radio News.