http://elecraft.85.s1.nabble.com/75ohm-Impedance-question-K3S-and-Antenna-side-tp7659364p7659401.html
> The 200' run is Cable TV hardline (1/2") 75 Ohm, that's where the UnUn would go (maybe).
>
> Jerry Moore
> Cell: 803-431-1870
>
> -----Original Message-----
> From: Victor Rosenthal 4X6GP <
[hidden email]>
> Sent: Tuesday, March 31, 2020 1:58 PM
> To:
[hidden email];
[hidden email]
> Subject: Re: [Elecraft] 75ohm Impedance question K3S and Antenna side.
>
> I don't think you need a unun because the additional loss due to SWR running RG/6 at 2:1 is only 0.381 dB, and the unun itself would certainly have some loss.
> But the loss in 200' of RG/6 even at 1:1 is about 2.9 dB! That is almost half your power. RG/8 would have only 1.9 dB loss, and with a probable SWR of about 1.5:1 you would have a total loss of 2.2 dB.
> Even better would be Belden 9913 or similar coax, which would give you a total loss of 1.6 dB.
> All these facts and more are available at <
https://www.qsl.net/co8tw/Coax_Calculator.htm>
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> Formerly K2VCO
> CWops no. 5
>
http://www.qsl.net/k2vco/> On 31/03/2020 19:39,
[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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