New MFJ 1.5KW 80/160M high-efficiency Matching Network for 43’ verticals!

[Moleculo]

MFJ has two new matching network products for 80/160 meter verticals. Here is the press release I received for these interesting new products:

MFJ 1.5KW 80/160M high-efficiency Matching Network for 43’ verticals!​

MFJ-2910, $299.95

MFJ-2910 improves efficiency on 160 and 80 Meters for the popular new 43-foot all band vertical antennas by eliminating SWR-related coax and unun mismatch losses.

When fed with a 1:4 unun, the 43’ antenna has a reasonable compromise SWR on 60-10 Meters. However, at 160/80 Meters it is virtually impossible to match this antenna because of the low radiation resistance.

If you are using low loss coax, you will lose much power in the coax and unun due to bad antenna mismatches. Installed at the base of the 43’ vertical, MFJ- 2910 will significantly eliminate these losses and put 160 and 80 Meters back within the tuning range of the tuner inside the shack.

MFJ-2910 includes a high-voltage insulated base tube, remote power injector with switch for 160, 80 Meters and off positions. It handles 1.5kW. Matching box is mounted in a rugged, weather-resistant PVC housing, 3Wx16Hx3D inches.

New! 600 Watts 80/160 Meter Matching Network
MFJ-2908, $249.95. Has all features of the MFJ-2910, but handles 600 Watts. MFJ-2908 measures 3Wx11Hx3D inches.

 

[Justme]

Might be a solution, but for that price i rather have my solution.
77 feet high inverted L with 77 feet horizontal, fed at the base with the MFJ 998 1500 watt autotuner running it from 160 - 10.
Above 40 i prefer the OCF or up at 18 - 10 the vertical on the roof though.
Having 3500 feet copper wie radials does help...op:

The 43 feet vertical on 160 is quite short, on 80 it can do.

 

[walterb]

43' Vertical

Here is what I did for the last 2 years on my 43' vertical, I added a screwdriver mobile antenna in series with the feed line coax to the 43' vertical. It works 10-160m with a SWR on 1.2 to 1 or less. works great 5-1000+ watts, talks an hear well, have the 43' vertical mounted over 3500' feet of radials 18 to 65' long, this antenna system is very efficient, no miss match or heat loss, have talked around the world on this system with very good signal reports. KB6HRT............. Oldtimer

 

[W5LZ]

All of the solutions mentioned are basically adding a loading coil to an antenna that's very short for it's intended frequency of use. It 'works'. And as MFJ says in it's advertising, it's a -compromise-.
The one thing that's probably the cheapest 'improvement' for any such antenna is a better ground/ground radial system. It certainly isn't a 'cure-all', and it isn't the easiest one thing to 'do', but it's probably the 'cheapest' thing to produce better results. And naturally, there are limits.
- 'Doc