[TowerTalk] Hard wired coax

Gary Schafer garyschafer at comcast.net
Mon Apr 30 22:12:30 EDT 2007


Check it again but this time place a capacitor in series with the load
resistor of a selected size or a variable to make the swr around 1.3 at the
load. Then connect your piece of line with the splice to it and measure

73
Gary  K4FMX

> -----Original Message-----
> From: towertalk-bounces at contesting.com [mailto:towertalk-
> bounces at contesting.com] On Behalf Of jacobsen_5 at msn.com
> Sent: Monday, April 30, 2007 7:21 PM
> To: K7LXC at aol.com
> Cc: towertalk
> Subject: Re: [TowerTalk] Hard wired coax
> 
> Steve and all......... I just happened to have something similar here that
> I could go test.  Instead of the coax going/continuing in a straight line,
> mine doubles back. Think of the "Victory" V sign with your 2 fingers. The
> splice is at your knuckle, and your 2 fingers are the coax going to
> whever.....
> 
> I had abt 65' of RG213 to the splice, and then abt 35' past the splice to
> the end. I placed a 50 ohm resistor at the end and ran it with the MFJ-259
> (after of course checking the resistor right at the 259 to make sure it
> was a "dummy load".
> 
> Up to abt 7 or 8 mhz, little or no variation 1:1.  Then as I kept going up
> to 30 mhz, there were little spikes to abt  1.3:1. Going up to 50 mhz
> started getting spikes to 1.7:1. Now I would suspect some of them were
> cause by 1/4 or 1/2 wave lengths, coax age, my "old" eye sight, and a few
> other things we won't go into.
> Of course, as always, YMMV.
> 
> I used this coax/splice this winter on a quicky 75/160 vertical I threw
> together. Worked way beyond my wildest dreams!!! 26' tall (boom from an
> old 204BA), 9' top hat, some well placed inductance, and 24 ea 30'
> radials. 600 watts PEP out.
> 
> ARRL Intl DX contest...... in 24 Q's, 4 were Canada, the rest were Europe
> and Central/South America. The 1st was with ON4UN...... Talk about a
> thrill!!!!!!!!!
> 
> CQ 160/SSB contest had 100 Q's, all over the US and Canada.
> Can you tell I'm a real hard core contest kinda guy?!
> 
> 
> Hope this helps a little.
> 
> 73
> K9WN Jake
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