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  #41 (permalink)  
Old 03-19-2016, 3:08 PM
Was Trucker_Tom
   
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Back to the OP, personally with the A99. I'd just go with good ole Belden RG8 and be done with it...It's a CB radio. You're not building a rocket!!
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  #42 (permalink)  
Old 03-19-2016, 11:49 PM
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Quote:
Originally Posted by prcguy View Post
So the 175ft run in LMR400 has about 1.1dB loss .
prcguy
I calculate closer to 1.4 dB cable loss, even so that is pretty low.

I'm used to dealing with 440-480 MHz, and forgot that this is low band we're speaking of...
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  #43 (permalink)  
Old 04-07-2016, 5:00 PM
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I found used LDF5-50 Heliax on QTH.com with a male and female 259 type connectors. What loss?
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  #44 (permalink)  
Old 04-07-2016, 7:19 PM
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This site has a loss calculator that includes LDF5-50, just punch in the cable type , frequency and length for the answer. Coax Loss Calculator
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Originally Posted by ind224 View Post
I found used LDF5-50 Heliax on QTH.com with a male and female 259 type connectors. What loss?
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  #45 (permalink)  
Old 04-08-2016, 8:53 PM
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The CBers I grew up never worried about losses. Their answer was just to push more power!!
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  #46 (permalink)  
Old 04-08-2016, 8:55 PM
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Exactly!!!
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  #47 (permalink)  
Old 04-08-2016, 10:46 PM
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Quote:
Originally Posted by TheSpaceMann View Post
The CBers I grew up never worried about losses. Their answer was just to push more power!!
With a properly tuned antenna system I can work the world on true QRP (5 watts max).

Power isn't the answer to everything! Do more with less...
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  #48 (permalink)  
Old 04-08-2016, 11:56 PM
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Quote:
Originally Posted by N4GIX View Post
With a properly tuned antenna system I can work the world on true QRP (5 watts max).

Power isn't the answer to everything! Do more with less...
Well that's all most CBers ever had! They could talk all over the country with just 5 watts and a half wave on the roof. The problems started when the CB band became super crowded, and people began competing with each other for the DX by hooking up power mikes, opening up their audio, and adding linear amplifiers!
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  #49 (permalink)  
Old 04-23-2016, 9:27 AM
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Quote:
Originally Posted by leawoodcops View Post
how do I waterproofing the antenna connection?
do I just put electrical tape around the connector
Butyl tape is hands down the best product I've used for sealing coax connectors. It's a little missy but well worth it if you don't need to access the connection for long periods of time.
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  #50 (permalink)  
Old 04-23-2016, 12:38 PM
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Quote:
Originally Posted by TheSpaceMann View Post
Well that's all most CBers ever had! They could talk all over the country with just 5 watts and a half wave on the roof. The problems started when the CB band became super crowded, and people began competing with each other for the DX by hooking up power mikes, opening up their audio, and adding linear amplifiers!
Heh! Back in the early sixties I was able to talk cross-country from
Arlington, VA to San Francisco, CA on a 100mw HT (when skip was good). Those were the days... which will never return, darnit!
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  #51 (permalink)  
Old 06-21-2018, 11:37 AM
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Length and power, both make a difference in co-ax. OK, I have a 50' run to my co-ax ground connection, then 30' on to my radio etc. may run 250 kicker. What is best in my case ? I do care about cost but want the best I can buy.
Thanks guys
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  #52 (permalink)  
Old 06-21-2018, 12:29 PM
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A couple tight layers of Scotch 33+ electrical tape will be good for the lifetime of most home installations. One of the best permanent ways to waterproof is an Andrew kit for Heliax connectors where you first put on a layer of thick electrical tape, then a sheet of tar like goo then a couple more layers of wide electrical tape. When its done it looks like a small black football but 40yrs from now the connectors will be just like new.

They key with any sticky tar like monkey snot is never put it directly on the connector or cable, always put a layer of tape down first or you will never get the goo off to make changes or repairs.

Quote:
Originally Posted by comoman View Post
Butyl tape is hands down the best product I've used for sealing coax connectors. It's a little missy but well worth it if you don't need to access the connection for long periods of time.
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  #53 (permalink)  
Old 06-29-2018, 3:01 PM
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Reading this - I wonder which is best for my run - 50' from antenna down mast to co ax grounding bar. Then 35 ' on to my radio. 3 ground rods in a triangle with my antenna.all connected. ground wire down inside the mast for a direct ground.Ground triangle 8' between grd. rods.
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  #54 (permalink)  
Old 06-29-2018, 3:33 PM
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If you are grounding for safety look up NEC Article 810 which deals with antenna grounding to meet code. If your grounding for lightning protection, without professional help and a lot of $$ to design a proper grounding system, you cannot survive a direct lightning hit without extensive damage so don't build something that will give you a false hope. If you are grounding to improve antenna performance you are wasting time and money because grounding as you describe will do nothing to improve transmission or reception or reduce noise.



Quote:
Originally Posted by arkieguide View Post
Reading this - I wonder which is best for my run - 50' from antenna down mast to co ax grounding bar. Then 35 ' on to my radio. 3 ground rods in a triangle with my antenna.all connected. ground wire down inside the mast for a direct ground.Ground triangle 8' between grd. rods.
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  #55 (permalink)  
Old 06-29-2018, 4:48 PM
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Quote:
Originally Posted by N4GIX View Post
Heh! Back in the early sixties I was able to talk cross-country from
Arlington, VA to San Francisco, CA on a 100mw HT (when skip was good). Those were the days... which will never return, darnit!
They just might return! Wait for the peak of the solar cycle!!
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  #56 (permalink)  
Old 06-30-2018, 11:09 AM
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PRC guy - I am just using my experience with gov. buildings - we ran grd wire to ever thing on roof, then our down lead went as straight down as possible, and hooked to the outside grd grid. Not a direct grd by itself.I have mine dropped down inside the antenna mast, directly to a copper grd.. rod, that rod connects to two other grd. rods.I am sold on good grounding both electrical and lightning,The ground wire for my gear, cases, also comes outside and hooks to that grid. The co-ax goes thru a grd. bar, that is hooked to this grid.I am not a smart a&&, but can use all the advice I can get.
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