I hope Van Gordon really has some of the 72 or 75 Ohm stuff, and it's just
*listed* under "450 Ohm Ladder Line" as a misleading heading, because I
haven't seen any for sale in years. None listed in the latest Belden
catalog, or any other transmission line catalog I have. As a last resort a
few years back I tried some PVC insulated #18 ga lamp cord whose only label
was UL1950 600V 6A or something like that, and it actually measured quite
consistently at about 70 Ohms, even at 100 MHz (used a 70 Ohm dummy load and
directional coupler with signal generator and RF microwattmeter). I tried a
few different six or eight foot lengths cut from different parts of the 500'
spool, and sure enough, 70 Ohms with very little deviation. Wonder how
consistent it is from brand to brand and spool to spool? The PVC is
probably a bit lossier than polyethylene, but most of the loss would be in
the skin resistance of the wire.....-WB2WIK/6
"Success is the ability to go from failure to failure with no loss of
enthusiasm." -Winston Churchill
> -----Original Message-----
> From: Don Havlicek [SMTP:n8de@thepoint.net]
> Sent: Tuesday, June 17, 2003 2:31 PM
> To: Doug Faunt N6TQS +1-510-655-8604
> Cc: olinger@bellsouth.net; towertalk@contesting.com
> Subject: Re: [TowerTalk] Source of 75 ohm twinlead?
>
> 450 home ladder line is NOT 75 ohm twinlead!
> I have some of the 75 ohm, but not enough to help you.
> Don
> N8DE
>
>
> Doug Faunt N6TQS +1-510-655-8604 wrote:
> > VGE/ Van Gordon Engineering, 216-481-6590, seems to be advertising it
> > in the July 2003 WORLDRADIO, page 11; 13ga at $0.20/foot. It's listed
> > under "450 OHM LADDER-LINE".
> >
> > 73, doug
> >
> > From: "Guy Olinger, K2AV" <olinger@bellsouth.net>
To: <towertalk@contesting.com>
> > Date: Tue, 17 Jun 2003 16:44:33 -0400
> >
> > Hi,
> >
> > Does anyone have a source of 75 ohm twinlead, in the USA or
> > overseas. Seems to be much rarer these days. It's just the bill for
> > a colinear matching problem.
> >
> > _______________________________________________
> >
> > See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
> >
> > _______________________________________________
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> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
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