You probably are choosing the SG-239 for its power handling capacity over the SG-237. Another consideration is that the 237 is waterproof but the 239 is not....
91
chas
schuetzen
Apr 10, 2011 12:11 am
... THE tuner at the base is NOT going to stop rf traveling on the outside of the coax. that is what a choke coil, aka unun does do. of course, I could just ...
90
Mike Fatchett
w0mu
Apr 9, 2011 9:57 pm
If you have a remote tuner at the base, it is my understanding that you do not need an unun. ... [Non-text portions of this message have been removed]...
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William
kc4wvl
Apr 9, 2011 3:31 pm
I just placed an order for the S9v43 from CheapHam today. Just crossing my fingers that it will arrive prior to Field Day. I'll probably receive the un-un...
88
chas
schuetzen
Apr 9, 2011 3:30 pm
Can a SG-239 be mounted at the bottom of the 43'Vert at the end of about 200' of LMR400? If so, will an UNUN be required between the AT and the bulkhead? or...
87
Clyde Campbell
multiguy561
Apr 9, 2011 3:30 pm
The 31 is only $95 and LDG is supping an UNUN with it and a 4:1 coming later at no extra charge Clyde de AB4CC [Non-text portions of this message have...
86
kb0naz
Apr 8, 2011 2:53 am
I'd probably have sold you mine for what I paid from S9. Scott KB0NAZ...
85
Chris Baker
honywood...
Apr 7, 2011 5:29 pm
No problem just remember the 1:1 is a choke to isolate the feeder from the radiator. My old radio lecturer used to tell us that a aerial is really part of the...
84
digitalsbyronnie1
digitalsbyro...
Apr 7, 2011 3:19 pm
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Chris Baker
honywood...
Apr 7, 2011 4:16 am
Basically the 1:1 ensures that the coax does not radiate and RF does not get picked along the coax. Rule of thumb is that the 2 vertical lengths are 1/4 wave...
82
digitalsbyronnie1
digitalsbyro...
Apr 6, 2011 7:20 pm
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Dwayne
ldgelectronics
Apr 5, 2011 10:57 pm
Hi Group, We're adding the RU-4:1, a 200 watt 4:1 Unun to our Balun line (Ok, now Balun and Unun line). Since we've acquired S9Antennas, we've found that we...
80
skyeye012001
Apr 5, 2011 1:27 pm
Well, last evening, we had another powerful cold front come through New Orleans with wind gusts between 60 and in some parts over open water, 90 Mph. I live...
79
w1wh
Apr 4, 2011 12:18 pm
I ordered the 43' S9 from Cheapham yesterday...gonna be interesting...hope it doesn't take too long! 73, Bill W1WH...
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Chris Baker
honywood...
Apr 2, 2011 6:01 pm
Try a Google on 4:1 unun and get info to build one Honest its not too hard!!! Something about building bits! Thanks Chris Baker B.A. Sunny Morecambe, the...
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Clyde
multiguy561
Apr 2, 2011 6:01 pm
Well I ordered the 31" S-9 from Cheapham yesterday. So some day the antenna will arrive, hopes it's before Field Day. 73 AB4CC...
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chas
schuetzen
Apr 2, 2011 12:34 pm
... I PLAN to roll out about 25' of plastic coated chicken wire and run it down the West easement of my yard except for an area sufficient to contact the ...
75
skyeye012001
Apr 2, 2011 12:55 am
... Chas, so far the only thing the antenna has gotten into is my CO2 detector. Course all my antennas get into that one and my touch lamps. No problems with...
74
Joe
joekrepps
Apr 2, 2011 12:54 am
Hi, First post. Does anyone have any experience with roof mounting a S31? Long, long ago, I had a HyGain 18AVT/WB on a 2nd floor, flat roof. I would really...
73
goddardcat
Apr 1, 2011 11:22 pm
What is your SWR on the bands other than 40M without the tuner? If it's high you will have huge losses in your feedline. That's why the unun is needed. It...
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Don Roberts
don_roberts2000
Apr 1, 2011 8:28 pm
On 40 I go direct, on the other bands I get 1:1 swr using my MFJ tuner, with no unum or balun. Don, W4CBS [Non-text portions of this message have been removed]...
71
schuetzen
Apr 1, 2011 8:27 pm
... I really like this house mount as my home has a 18KV power line? running across the back of the backyard keeping me fron erecting a 43' without a guywire...
70
skyeye012001
Apr 1, 2011 8:27 pm
... I forgot to mention that I also installed light weight wire mesh hardware cloth measuring 4ft. by 15ft. under the antenna. This helps the ground plane...
69
skyeye012001
Apr 1, 2011 2:26 pm
... I have about 16 radials going out to the front and back yard down the alley next to the garage. They are made out of 14 gauge stranded copperweld naked...
68
kb0naz
Apr 1, 2011 2:11 pm
not much room for radials,what did you do for running radials ? Scott KB0NAZ...
67
skyeye012001
Mar 31, 2011 7:03 pm
I have limited area on my lot to do vertical antennas. Ergo, the reason I selected the S-9 type antenna. Before I ordered my 43foot S9V, I put up an old black...
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ac.ewing@...
wa6kek
Mar 29, 2011 10:19 pm
Thanks Dwayne, been waiting for that. Sent via DROID on Verizon Wireless [Non-text portions of this message have been removed]...
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Dwayne
ldgelectronics
Mar 29, 2011 4:57 pm
We've added the older manuals to the LDG web site. Click on the link above or go the LDG site, then Support/Manuals, then Download Product Manuals, then scroll...
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Chris Baker
honywood...
Mar 29, 2011 3:31 pm
Great Is the 1:1 match on all bands direct? or via the ATU ?? It should be good on 40m as its almost 1/4 wave and a 1:1 in place helps to stop common mode pick...
62
Don Roberts
don_roberts2000
Mar 29, 2011 12:03 pm
I use the 31 ft S9v mounted 4' above the ground, level with my metal fence which I use in place of radials. I have 1:1 SWR on 80 through 6,and get out...
