That's what I was thinking, too.
RG-213 is only supposed to have something like less than a dB of loss
for three times that length at 10 Mhz.
There's something else at work there.
Jeff/KD4RBG
---- Original message ----
>Date: Tue, 19 Aug 2008 22:55:44 -0400
>From: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
>Subject: Re: [TowerTalk] upgrading from a G5RV
>To: K4SAV <RadioIR@charter.net>
>Cc: towertalk@contesting.com
>
>K4SAV wrote:
>> A quick check with EZNEC shows the following loss in the 30 feet of
>> RG213. The antenna was placed at 40 feet.
>>
>> 3.5 MHz 2.17 dB
>> 7 MHz 1.95 dB
>> 10.1 MHz 4.42 dB
>> 14 MHz 6.5 dB
>>
>6.5 sounds pretty high. What kind of match/mismatch are you giving him?
>With or without a balun.
>> 18.1 MHz 2.28 dB
>> 21 MHz 3.1 dB
>> 24.9 MHz 4.35 dB
>> 28 MHz 3.12 dB
>>
>Roger (K8RI - ARRL Life Member)
>www.rogerhalstead.com
>N833R (World's oldest Debonair)
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|