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how to set swr on a 10 meter

Help with installing an Antenna, or just choosing the right antenna to go with your radio, or your mobile.

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burbman
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how to set swr on a 10 meter

Post by burbman » Thursday, 04 October 2007, 1:53 AM

helo i have a 3300hp from connex with the converted channels on he d band and i would like to know when setting the swr do i set ch1 on a band on low and 40 on hi in f band


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Post by montecarlossfan » Thursday, 04 October 2007, 5:34 AM

what band do u plan to use..all? or just cb band? if just cb band, use band d..ch 1, 40 same as if u had a reg cobra cb...antenna type? some antennas dont have that much range in terms of frequency

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Re: how to set swr on a 10 meter

Post by dud muck » Thursday, 04 October 2007, 7:53 AM

burbman wrote:helo i have a 3300hp from connex with the converted channels on he d band and i would like to know when setting the swr do i set ch1 on a band on low and 40 on hi in f band


hahah lolol hah.
Thats a great joke you posted to JOKES & HUMOR.

Actually what you're asking about is antenna adjustment.
The most broad-banded CB antenna is the 102" whip, with 6" spring.
Since you have an AM rig, you don't want to use anything above CB CH40 because thats all SSB.
I might suggest to adjust your antenna whip for lowest SWR on CH1 so you can work better below CH1 where there is AM activity.
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Unlimited power permitted on CH1 to CH27 as per FCC CFR 47 part 18: 18.305(a) and 18.301



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Post by burbman » Thursday, 04 October 2007, 15:07 PM

mainly just the 40 ch D band but i was asking mainly because 10m have different bands and was not sure if i had to check ch1 on A band in low freq and then 40 on high in the upper freq when i checked the swr on my radio using the current antenna a wilson fgt 3' fiberglass on my 959 my swr was 1.0 1.0 and 1.2/1.3 and when i put my connex on and quickly checked my swr in low was 2.5 and 3.0 and on hi was 4.0+ ground the antenna be better but i have a predator antenna coming in and stud mount and i have some coax from RA right now not installed yet and i have a swr/watt meter from astatic the PDC1 how do i use the meter i lost my instructions.

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Post by crazytruker » Thursday, 04 October 2007, 15:48 PM

set your swr's checking them on channel 1, 20, 40, of the cb band. if you try channel 1 of A band then 40 of F band you are trying to tune the antenna over such a broad band of channels it will never work. set the swr for your cb band. you can go below that or above that some but as you get further away from 1-40 cb band the swr's will climb.

Let's be honest here. People rarely buy 10m export radios(connex,galaxy, etc...) for HAM use. Some do but serious HAMS buy ICOM and others for real HAM use. It's no secret, the fcc is full aware and who cares really. There is no one antenna that will keep a good swr and cover all the channels you have in that Connex 3300hp. You bought it for the features and the power as everyone does. You will use it in cb land so tune it for the cb band. If your swr's are 1.1 or 1.2 on cb channel 1 and you go to band A or B you will be so far out of tune it's not funny. Same as band E or F


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Post by Circuit Breaker » Thursday, 04 October 2007, 16:22 PM

Crazytruker is correct. Try to get the best match on channel 20, which is the center of CB. Your match should go up fairly evenly as you go up or down in the band. There's no sense in setting the antenna for a great match on anything above 40 since the dominant mode there is SSB. And there's no sense in trying to get a great match for the 10 meter band since talking there without a license is definitely an invitation for trouble. Also, any antenna that can cover a very wide range of frequencies is LESS efficient than an antenna that is narrower in bandwidth. It means there is a lot of loading going on and a lot of power being wasted as heat.

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Post by burbman » Thursday, 04 October 2007, 16:32 PM

okay thats what i needed to know but there is one more question i have the glaxy 959 i have right now with the 3' fgt wilson antenna on the truck with some armorflex coax 18' the swr on the radio is 1.0 on 1 and 20 actually needle doesent move asuming its 1.0 and 1.3 on 40 i put the connex to it and the swr in the low power was 2.5 on 1 and 3.0 on 40 and in hi was 4.0 on 1 and 40 why is that just a mis match of impedances between coax,antenna and radio and when i tune the connx i should set the swr with the radio in HI power right.

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Post by crazytruker » Thursday, 04 October 2007, 16:41 PM

swr's should not change like that with different radios. not sure why it would do that. perhaps the meter in one of the radios is lying to you. a 3300 isn't so much higher powered than the galaxy that it would go that high. i can't tell you what's going on there

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Post by Phaze91460 » Thursday, 04 October 2007, 19:04 PM

Burbman, I'm sure you didnt intend to post this as a joke in the joke section. I moved it here where it can get the attention it deserves.

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Post by crazytruker » Thursday, 04 October 2007, 19:15 PM

Phaze91460 wrote:Burbman, I'm sure you didnt intend to post this as a joke in the joke section. I moved it here where it can get the attention it deserves.


I wouldn't be so sure there Phaze

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Post by burbman » Thursday, 04 October 2007, 19:17 PM

could just be the meter

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Post by jessejamesdallas » Thursday, 04 October 2007, 19:51 PM

crazytruker wrote:
Phaze91460 wrote:Burbman, I'm sure you didnt intend to post this as a joke in the joke section. I moved it here where it can get the attention it deserves.


I wouldn't be so sure there Phaze


HEHEHEHEHE! Beat me to the draw! :lol:

Burbman...are you looking at the meters on the radios? Or what?
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Post by Mentor3006 » Thursday, 04 October 2007, 20:28 PM

The Hams I know all use a 102" whip 6" spring combo and make sure on CB their SWR is 1.0 - 1.1 flat on the CB band, which usually means they would be under 1.4 through 10M.
Coils = loss.

Good audio, Quality coax, sturdy mounts, good springs, and a big stainless stick get you out and give you ears!

Keep the corkscrews for opening wine bottles.




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