[TenTec] SLIGHTLY OT

[Steve Hunt]

It not only wont read that high - it's probably calibrated for a 50 Ohm 
system not a 400 Ohm system ;)

73,
Steve G3TXQ


On 08/04/2011 22:35, Walt Amos wrote:
> WOW ........... you got to be KIDDING, eh?
>
> 320 X 1, my golden eagle CB watt meter doesn't even read that high! :-)
>
> Walt K8CV Royal Oak, MI.
>
>
> ----- Original Message -----
> From: "Steve Hunt"<steve at karinya.net>
> To: "Discussion of Ten-Tec Equipment"<tentec at contesting.com>
> Sent: Friday, April 08, 2011 5:11 PM
> Subject: Re: [TenTec] SLIGHTLY OT
>
>
>> Mike,
>>
>> You're putting words in my mouth - I've not said anything about whether
>> an antenna is "half decent" or not.
>>
>> What I can tell you for sure is that a 132ft dipole at 50ft above
>> average ground will have a feedpoint impedance of around 10-j1059 Ohms
>> at 1.9MHz; and that load will result in 6.5dB loss in 100ft of Wireman
>> 551 if it's dry, and 9dB if it's wet. I leave you to judge whether or
>> not that constitutes a "half decent" antenna for that band.
>>
>> Why are the losses so high? Because that feedpoint impedance produces a
>> VSWR of 320:1 on the 400 Ohm 551 ladderline.
>>
>> 73,
>> Steve G3TXQ
>>
>>
>