Would you like to react to this message? Create an account in a few clicks or log in to continue.
Welcome to the Charlie Tango DX Group. The home of ALL things Radio - CB, 11m DX, Amateur, PMR446, PLD, Network and Data. We welcome all radio enthusiasts of all knowledge levels. Join today and claim your own unique World Famous CT Call-sign
Posts : 350 Times Thanked : 12 Join date : 2021-11-19 QTH or Location : Shrewsbury Equipment Used : kit
Subject: NVIS 40m Dipole Mobile Whip Antenna Wed Dec 22, 2021 11:56 pm
.
Last edited by Wireless on Wed Aug 17, 2022 11:56 am; edited 1 time in total
kilomike and Kosh like this post
Guest Guest
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Sun Jan 02, 2022 12:17 pm
How sturdy is the centrepiece? How are you going to mount it?
I've looked at them before but can't decide if it's going to be strong enough.
Bean Major contributor
Posts : 214 Times Thanked : 6 Join date : 2019-06-29
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Sun Jan 02, 2022 12:45 pm
The MFJ-347 is the one to go for if your worried about the strength of a dipole centre for 3/8th whips.
Wireless Major contributor
Posts : 350 Times Thanked : 12 Join date : 2021-11-19 QTH or Location : Shrewsbury Equipment Used : kit
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Sun Jan 02, 2022 2:03 pm
.
Last edited by Wireless on Wed Aug 17, 2022 11:57 am; edited 1 time in total
Guest Guest
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Sun Jan 02, 2022 7:22 pm
How on earth would you consider using a dipole mobile
Wireless Major contributor
Posts : 350 Times Thanked : 12 Join date : 2021-11-19 QTH or Location : Shrewsbury Equipment Used : kit
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Sun Jan 02, 2022 11:24 pm
.
Last edited by Wireless on Wed Aug 17, 2022 11:57 am; edited 1 time in total
Guest Guest
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Mon Feb 14, 2022 8:25 pm
Just bit the bullet and bought a set for 40m, I'll swap out the 50MHz halo with it. I'll leave the compromise multi-band antenna as is for now, as I'm not running QRP having a resonant antenna is not so important
If enough of us get some half decent NVIS antennas for 40 we could get some CT action going.
SangueG Major contributor
Call Sign : 26-CT-3971 / 2E0LMI Posts : 1316 Times Thanked : 85 Join date : 2021-01-30 QTH or Location : Cirencester, Gloucestershire Equipment Used : Little radios, home-made antennas
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Tue Feb 15, 2022 8:06 am
Do let know if a CT something goes ahead on 40 sometime and I'll try to join in if home. 40 is my least efficient permanent element but have made a few contacts between 50 and 300 miles when the foF2 has been high enough.
Related note, on mobile antennas that might be suitable for NVIS I came across an 11m antenna designed for RVs made by Jo Gunn (you should find easily with a quick net search). Something like that probably could be fitted to roof racks of large cars and with a couple of coils to bring it to resonance on 40 and being so low to the ground, it might just work.
Guest Guest
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Wed Feb 16, 2022 1:46 pm
My whips arrive later today and the dipole centres are already here. They are a lot better than I was expecting for £7. Any actual outside antenna work will have to wait for a little while however,
Wireless Major contributor
Posts : 350 Times Thanked : 12 Join date : 2021-11-19 QTH or Location : Shrewsbury Equipment Used : kit
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Wed Feb 16, 2022 7:43 pm
.
Last edited by Wireless on Wed Aug 17, 2022 11:58 am; edited 1 time in total
Guest Guest
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Wed Feb 16, 2022 9:05 pm
Reading about optimal height above ground (for 40m) I think that I've settled on 15 feet. It could go higher, but I shall try that for now.
Need a dry not so windy day to actually get it out there....
Wireless Major contributor
Posts : 350 Times Thanked : 12 Join date : 2021-11-19 QTH or Location : Shrewsbury Equipment Used : kit
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Thu Feb 17, 2022 12:03 pm
.
Last edited by Wireless on Wed Aug 17, 2022 11:59 am; edited 1 time in total
Guest Guest
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Thu Feb 17, 2022 5:47 pm
I got it up today!
I also raised the mast another 15 feet, apparently it may be windy tomorrow.... but you only live once.
Not impressed so far, but the fof2 barely reached 7MHZ today, so it was seriously outperformed by the existing coax fed compromise antenna.
Wireless Major contributor
Posts : 350 Times Thanked : 12 Join date : 2021-11-19 QTH or Location : Shrewsbury Equipment Used : kit
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Fri Feb 18, 2022 9:59 am
.
Last edited by Wireless on Wed Aug 17, 2022 11:59 am; edited 1 time in total
Wireless Major contributor
Posts : 350 Times Thanked : 12 Join date : 2021-11-19 QTH or Location : Shrewsbury Equipment Used : kit
Subject: Re: NVIS 40m Dipole Mobile Whip Antenna Mon Feb 28, 2022 2:46 pm
.
Last edited by Wireless on Wed Aug 17, 2022 11:59 am; edited 1 time in total