Re: 75ohm Impedance question K3S and Antenna side.

Posted by Bob McGraw - K4TAX on Mar 31, 2020; 6:19pm
URL: http://elecraft.85.s1.nabble.com/75ohm-Impedance-question-K3S-and-Antenna-side-tp7659364p7659371.html

So you end up with <  2:1 SWR on the line.  Actually TLW shows the input
to the line SWR as 1.87:1, at the load 2.15 and the total loss at 28MHz
as 1.017 dB.  Nothing wrong with those numbers.   You don't need a 2:1
UNUN.

Keep the length of RG6 to a minimum as it has higher loss than the 1/2
inch 75 ohm CATV cable.

73

Bob, K4TAX


On 3/31/2020 11:39 AM, [hidden email] wrote:

> I'm about to pull the trigger on a Hustler 6BTV (6-Band, 80, 40, 30, 20, 15,
> 10 meters). It will be temporarily installed (with radials) about 200' away
> from my house. I'd like to run CATV "hardline" but I'm not sure how to get a
> 2:1 UnUn with a wide enough bandwidth on the antenna side (the impedance
> with 60ish radials should be in the 35ohm range). In addition I believe I
> will be ok on the RIG side to just connect RG6 (75ohm) to the hardline and
> direct to the rig since my K3S can match the impedance. Is this essentially
> correct and is there a better way to do this? I'm trying to minimize losses
> for the distance run and still have a decent transmitted signal.
> Thanks in advance.
> Yeah, I should know this stuff but I can't know everything 100%.
>
> 73 es
> De AE4PB
> ..
>  
>
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