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Long wire question

Singularity35

DU7DVE
Jan 16, 2014
425
90
138
Small City, Philippines
I'm needing some input again guys. I am building a go box basically just for field operations and not so much as a prepper and I got an MFJ16010 long wire tuner. What's the best way to set this up?

From my research, some people say I don't need a counterpoise and some say I do.

Which is which?

Thanks in advance.
 

Steve_Buckeye

Active Member
Nov 12, 2015
63
45
28
64
North Miami, FL
From my past experience you need at least 1/4 wave counterpoise connected to the ground on tuner, I was using a MFJ-969. If you don't you will get some RF burn, even as low as 100 Watts. But if you don't have an amp it might be ok.
 

Road Squawker

Sr. Member
Jan 19, 2011
1,954
1,510
173
True, but I also consider the guidance of the more experienced hams as invaluable. :)

not to be "picky", but,..... it's not a long wire tuner,........... it's a random wire tuner (there is a difference).

if possible, stay away from wl/2 lenghts.

here is a good read on wire lengths to AVOID, depending on the bands you want to work.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=24&cad=rja&uact=8&ved=0ahUKEwiB15bpz5zSAhVk_4MKHZxHDWE4FBAWCCowAw&url=http://www.hamuniverse.com/randomwireantennalengths.html&usg=AFQjCNFsid4Qn_IMvw8jXeJTgG744NZbrw
 

Singularity35

DU7DVE
Jan 16, 2014
425
90
138
Small City, Philippines
not to be "picky", but,..... it's not a long wire tuner,........... it's a random wire tuner (there is a difference).

if possible, stay away from wl/2 lenghts.

here is a good read on wire lengths to AVOID, depending on the bands you want to work.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=24&cad=rja&uact=8&ved=0ahUKEwiB15bpz5zSAhVk_4MKHZxHDWE4FBAWCCowAw&url=http://www.hamuniverse.com/randomwireantennalengths.html&usg=AFQjCNFsid4Qn_IMvw8jXeJTgG744NZbrw

Thanks, I do like to be accurate with terminology.
 

Road Squawker

Sr. Member
Jan 19, 2011
1,954
1,510
173
Thanks, I do like to be accurate with terminology.

no problem,.... my real point was about the effect on the tuner when the freq is changed.

the same wire may be just a fraction of a wl on the low bands ( a random wire), and multiple wls long on the higher bands ( a long wire)
 

Singularity35

DU7DVE
Jan 16, 2014
425
90
138
Small City, Philippines
For field operations? Seems cumbersome to me. Maybe you have a good way to wrap/transport?

73,
Brett

Planning to get something like this case and put radio, tuner, power source in. Might be able to fit a coil of magnetic wire in too. Besides I'm probably not going to wander too far from the vehicle. :D

21726_9.jpg


no problem,.... my real point was about the effect on the tuner when the freq is changed.

the same wire may be just a fraction of a wl on the low bands ( a random wire), and multiple wls long on the higher bands ( a long wire)

Hhhmmm good to know. Thanks. :)
 

Singularity35

DU7DVE
Jan 16, 2014
425
90
138
Small City, Philippines
Thanks for the feedback so far but I'm gonna have to ask more questions.

How long should my counterpoise be if I have a 58 foot random wire that I'll use on 40m? Hehe yeah, technically it would no longer be a "random" wire if I have a specific length.

If I need a ground rod, how do I implement that?
 
Last edited:

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