14 October 2015 If I mount my PA0RDT clone on my mast stub, about 50 feet from my LF TX'ing aerial, is it likely to be damaged if powered on when TX'ing? Thanks. -- Best regards, Chris mailto:chris@c
Chris I run up to 1Kw on 136kHz and up to 400W on 475kHz and "alive" Eprobes (L400 and PA0RDT variants) about 100-150ft away up at 30ft plus and not blown them up. They don't like it much of course a
Hello Chris, The gate of the JFET at the input of the antenna will start to conduct when the voltage gets high and prevents it to rise higher. In other words, it is protecting itself. You should look
Laurence, Chris & All: I did a test with my eprobe which is about 30 feet away from my HF elevated ground plane that has 65 ft radials a few years back. With 100W output on 40 meters. I was getting 1
Laurence, Chris & All: I did a test with my eprobe which is about 30 feet away from my HF elevated ground plane that has 65 ft radials a few years back. With 100W output on 40 meters. I was getting
Laurence, Chris & All: I did a test with my eprobe which is about 30 feet away from my HF elevated ground plane that has 65 ft radials a few years back. With 100W output on 40 meters. I was getting
Laurence, Chris & All: I did a test with my eprobe which is about 30 feet away from my HF elevated ground plane that has 65 ft radials a few years back. With 100W output on 40 meters. I was getting 1
Laurence & All: It would be interesting to take one of those Array Solutions Receiver Front End Protectors http://arraysolutions.eestage.com/as-rxfep and replace the pair of isolation transformers in
One trick that I have used on several preamps: Put a small PC-mount relay (such as those used on telephone lines) at the front end of the preamp. Connect the relay coil to the preamp power feed. Wire
You could use a latching relay, and pulse the supply with reverse polarity to set teh input short. (Suitably protecting the preamp electronics with a diode) 'jnt On 15 October 2015 at 18:14, John An
G'day.. My PA0RDT has been operating for many years being located only 10m from my main TXing vertical section of a inverted L. At the shack in the coaxial line from the PA0RDT I have a 150ma 6.3v di
Am 15.10.2015 19:14, schrieb John Andrews: [...] This protects well against RF-swamping and nearby lightning hits. The down-side is that you have to supply the current to run the relay. German ops wh
