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, [email protected] 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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