I am interested if this works on a vertical, say 1/4 for 40m If so i would imagine it requires many many loops. A traditional gnd system as i have here is more the better..i have 32 radials of differe

Hi Chris What was the antenna being used on hf? Simon

Hi Chris..any chance of a copy?please.. Question..you say remove existing gnd system..this by disconnecting ( easy) or digging up? ( impossible.)

Hi Chris Dont suppose you could send a copy of your paper to me via email?? Interesting..Simon g0zen

Hi! looking for a quiet rf area to setup a remote sdr rx setup. not too far from london so can maintain. costs of use obviously paid to kind person who says use my field and wifi etc.. yes a long shot

My ccw preamp (as have the others .) have protection diodes fitted. I fitted them to my ccw . There was provision on the ccw pcb to fit.. Makes no difference to imd’s etc. Simon

Well I run 400w.. 15m away? Sdr fdm duo trx.. Are you concerned about the preamp or sdr?? No issues with preamps..my sdr is protected internally. One would hope yours is? Maybe check?? Its easy to add

Jeff.. adding chokes to coax will not effect inductance of antenna.. if you wish to do well do as Chris says..but you can wind turns of coax around 31 and 43 etc rings.. see g3txq common mode chokes f

Thicker dia the better. But no real gains after 25mm dia. its to lower inductance not resistance.. 2- 4 small loops in parallel works better..as lowers inductance.. no bigger if single than 1m dia..an

Steve May I suggest you remove your phone number asap.. This is an open group.. Simon

Yes you can filter it out.. Switchable..so when fm band dxing switch it out..otherwise in.. Mag loop simon

Wow..thats a hard way of doing it! But interesting. ( solar.) what about trying to educate people again about cat 5? For the gentleman comparing the mla to ccw unit.. See my post on this..do a search.

Sheilded twisted pair is good..but just gnd the sheild at rig end, not both. Twisted pair cable is better re rejecting picking up unwanted signals than coax, not worse. No harm in winding a common mod

Y?? Go buy from ebay air con copper tube..3m length..cheap..comes in a roll..maluable. Simon

Re 155mhz if its overloading the rx and not the loop amp then why not try a stub filter/ or similar notch filter in the coax between t match and rx? ( assuming no dc volts on coax from rx.) might be a

Oh one more thing, that will help others using sdr, can one setup a “ vfo” ie for example use a generic volume control usb thingy to act as a vfo? Reason worst thing about sdr is No vfo knob!!

Hi Yes pls send a pm No cant move computer..at moment cables are all over the place..testing. Mic cable etc are all ptfe double screened coax.. Simon

Oh..and post is still on Toms message..

Tom Re sdr spam I mean sdr console.. Says you can help?? Crap tx audio Gets worse as increase power/ go to lf bands..using hermes lite 2..( into big amp.) Suspect its rf getting in to computer..( may

Hi Rob ok you need 8 m length of mirobore copper tubing cut into 4 2 m lengths. 10mm dia tube..8 will do. B and q plumbers etc..its not expensive. or you could you 15mm dia copper water pipe and 90 el