MOBILEERING

MOBILEERING - Frazier Antenna's
I LOVE Mobiling!!!
MOBILEERING - Frazier Antenna's
MOBILEERING - Frazier Antenna's
MY MOBILE
If you're serious about mobiling you must read www.k0bg.com
My current mobile set-up consists of an auto coupler, a 4' mast, a stainless pizza pan "Pizza-Hat" and a stainless whip. My vehicle is very well grounded in multiple places, to frame, body, exhaust and engine. An auto-feedpoint- coupler is far superior in performance to an auto tuner, becase it doesn't tune the coax between it & the antenna. This set-up works excellent from 40m up, and passably below 40m with favorable conditions. I had 4 contacts during a 160m contest last night. It is very simple and convenient. It will not outperform a large coil screwdriver, but when mobile, with a cap hat, the take-off angle improves the amount of radiation at the horizon. One contact I made on 20m with 10 watts mobile had me at +10 over in S. Central Texas from Boise. That station was pushing 400 watts and his signal was +20 from a full size dipole. So their are situations when things are better than maybe they should be & the engineers can't explain away everything. There are a lot of tweaks one can do to improve your mobile signal and at times people will swear you are using an amp at a base station. Don't let anyone tell you it can't be done or80m mobile is useless. When I used the large bug catcher coil I had great contact on 75m regularly and acted as relay for net control picking up stations no-one else could hear. For an inexpensive improvement to the above, with minimal inconvenience, hustler coils can be placed above the mast, and they even come with a cap hat attachment now. Have fun and learn all you can. A compact auto tuner and a whip, if your vehicle is well grounded can give you lots of fun on the higher HF bands 10-20m and even 40m passably.

I couldn't find anyone willing or able to help me do this, and Alinco said it would void the warranty. So I did some trial & error on my own .In the EDX-2 pamphlet figure #1 it shows a simple drawing of the cable ends and assigns colors with purpose. Of course #'s 4-5 are power and you might want to wire it through an on/off switch. The 857D can be triggered to send a 10Watt CW carrier by shorting the leads on the ACC 3.5mm jack page 35 item #4 of the 857 op manual. This accessory cable is cross wired so you can't use a common 3.5mm cable. You must have the Yaesu acc cable, or wire one yourself. It's been a couple years so....I bought a black box at Radio Shack and 2 push button momentary switches (1.to trigger the tuning cycle)(2. to short to ground the green wire to clear memory), a simple on-off low profile red-lighted toggle (Power), and a female 3.5mm receiver plug. The green EDX wire contacts the tip of the YC (Yaesu) cable, the white contacts the base ring. RED & Black to the on-off switch. I have not found a way to make high SWR trigger a new tuning cycle. I still must clear memory manually and re-tune when the primary tuning cycle is faulted by ie: a semi driving past or being parked next to a metal building. When you move away from the object your SWR will rise because it was part of the tuning parameters. When you push the trigger button, it shorts the YC cable ends and the Yaesu sends it's 10 Watt carrier which triggers a tuning cycle in the EDX. Even when you must clear and re-tune, the cycle is fairly quick so it is a minor inconvenience. This is not usually a consideration when using it in a fixed location. A quick look around your mobile before tuning can prevent any faulty solutions. As long as you haven't cleared the memory you may return to any previously tuned frequency and start talking, but when cleared, all memories are cleared. If you need some clarification as you start to build it write me at w7lpn.hamradio@gmail.com. Edit- Originally I used a compact auto tuner in the cab with a manual trigger to tune. The Auto-coupler was far superior in simplicdity & accuracy of tuning.
Hope this helps 73


MOBILEERING - Frazier Antenna's

above I removed the feed point couple to refurbish the fiberglass case. Mobiling, especially out-backing, is rough on the coupler.
MOBILEERING - Frazier Antenna's


New Pizza Hat and LDG 100pro, then back mobiling
MOBILEERING - Frazier Antenna's
Originally had the TX Bug Catcher Fantastic on lower bands.
Tx Bug Catcher

Busted through a pile-up with this set-up to contact USS Missouri During refit at Pearl Harbor last night on 14.263. 5/9- 5/9


MOBILEERING - Frazier Antenna's

I had a radio mounted on the sportsman for a while, but I was afraid it would
get hit by a tree limb or vibration damage.


MOBILEERING - Frazier Antenna's

Loved the Pathfinder

MOBILEERING - Frazier Antenna's

2 wheeled homebrewed project
Big Red 3 wheeler front end welded to a home-made frame
snowmobile clutch & 10hp Tecumseh rototiller engine

More pages