Topband: Topband Inv-L Joy

ZR zr at jeremy.mv.com
Thu Jul 25 11:17:33 EDT 2013


On a side note WD-1A conductors are a copper/cadmium alloy; whatever that 
means in RF resistance. Fine for a Beverage but what is the loss?

Carl
KM1H

----- Original Message ----- 
From: "Gary Smith" <Gary at ka1j.com>
To: <topband at contesting.com>
Sent: Thursday, July 25, 2013 1:22 AM
Subject: Re: Topband: Topband Inv-L Joy


> Had a more difficult time getting the antenna up there this time. The
> first spud snapped away from the fishing line & in the dense thicket
> I was unable to find where it landed. Had to make another & the
> mosquitos were so thick they posted a LUAU sign on my forehead.
>
> Till I get something better I retrieved my WD-1A military field phone
> wire that was left out in the marsh as my old beverage wire. and
> after a comedy of errors I finally got the antenna up.
>
> I was earlier getting a SWR of 1.1 on 160 before and now am getting
> 1.1 on 1.74365 MHZ
>
> 1.74365mhz
> R=51 X= 6,7,8
> swr 1.1
>
> At the desired frequency to match the antenna I've aimed for 1.8MHZ
> here's the information I was able to get at my desired frequency:
> 1.8025 mhZ
> Coax loss 6.3db
> C=4193  XC=21
> L=1.970  X1=21
> r=41 x=21 swr 1.6
>
> So this is what the antenna is giving me at this moment. I need to
> get back down and add the broken wire to the radial bed and I should
> also trim some length to bring my values to 1.1 at 1.025MHz.
>
> Given the info above from the MFJ 259B any idea how much I might
> nibble off and more, is there anything in this info that tells me I
> should look to do anything differently?
>
> Hopefully the coax loss will be mitigated by a friend bringing me
> 350' of hardline. Can't wait!
>
> Thanks,
>
> Gary
> KA1J
> _________________
> Topband Reflector
>
>
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