When running multiple HF transmitters simultaneously its wise to: - avoid multi-band antennas, or - use external bandpass filters, or even better - avoid multi-band antennas and use bandpass filters
73 Frank W3LPL ----- Original Message ----- From: "Bob McGraw K4TAX" <rmcg...@blomand.net> To: donov...@starpower.net Cc: elecraft@mailman.qth.net Sent: Friday, June 14, 2019 5:36:21 PM Subject: Re: [Elecraft] FIELD DAY PREP Neither should G5RV antennas. Bob, K4TAX Sent from my iPhone > On Jun 14, 2019, at 10:44 AM, donov...@starpower.net wrote: > > oops... I meant to say: > > > Inverted V dipole and verticals are NOT allowed at W3AO > > 73 > Frank > W3LPL > > ----- Original Message ----- > > From: donov...@starpower.net > To: elecraft@mailman.qth.net > Sent: Friday, June 14, 2019 3:40:43 PM > Subject: Re: [Elecraft] FIELD DAY PREP > > We use a dozen K3 transceivers at W3AO, we've never had a K3 > failure despite running as many as four K3s on the same band > (CW SSB Digital and GOTA). The four K3s on each band do not > interfere with each other either. > > > > Our secrets to success: > > > - same band antennas are horizontally polarized and oriented exactly > end-to-end. Inverted V dipole and verticals are allowed. 100 feet > of tip-to-tip spacing appears to be adequate, although we use much more. > > > - We install W3NQN bandpass filters on every K3 to avoid overload > from signals from nearby antennas for other bands. > > > Its not widely known that K3 transceivers have built in bandpass > filters. As far as I'm aware their performance characteristics have > never been published, hence our preference to also also use external > bandpass filters. > > > 73 > Frank > W3LPL > > > > > > ----- Original Message ----- > > From: "Bob McGraw K4TAX" <rmcg...@blomand.net> > To: elecraft@mailman.qth.net > Sent: Friday, June 14, 2019 3:24:01 PM > Subject: Re: [Elecraft] FIELD DAY PREP > > With stations running 100 watts or less and reasonable antenna > separation, I've found no reason for a Receiver Input Protector. > Although, it might be a good idea to circumvent a "screw up" by an > operator. I've seen some mighty strange things done by knowledgeable > hams at Field Day. > > 73 > > Bob, K4TAX > > >> On 6/14/2019 10:07 AM, KENT TRIMBLE wrote: >> Have any of you used Ameritron's "Receiver Input Protector" model >> TRP-150? I find no reviews on eHam. >> >> 73, >> >> Kent K9ZTV >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to donov...@starpower.net > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to donov...@starpower.net > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rmcg...@blomand.net > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
