Fw: [Antennas] windowed ladder line vs. true open wire line
Jim Miller
[email protected]
Fri, 7 Feb 2003 08:36:59 -0500
Kees and group;
Only commercial source for open wire I'm aware of is www.w7fg.com for 600
ohm open wire.
73,
Jim Miller, K4SQR
http://www.comteksystems.com
4-Square Experts, Stack Yagi
& Remote Antenna Switching Systems
On Fri, 7 Feb 2003 07:17:16 -0600 [email protected] writes:
> Steve, I agree completely with your assessment of 450 ohm window
> ladder line. That's exactly what I have seen. Per and earlier
> exchange
> of information on the subject, this is what I found to minimize the
>> effect: 1) cut every spacer down to about 3/16" wide at the narrow
> point, the spacers will look like )( If you remove every other
> spacer,
> the line is too easy to twist 2) coat the line with silicone spray
> on
> a rag (silicone available at automotive and hardware stores).
>> There is still some effect but it's very small. As far as what is
> the
> easiest way of cutting down the webs ....I use a 1/2" gasket punch
> in a slowly running drill press for the two holes in the center and
> a
> cutter to remove the rest. Cut from along the wire towards the hole
> (tangential to the hole) to keep from nicking the wire.
>> Open wire ladder line is, of course, better relative to moisture and
>> does not have the problem window ladder line has unless you use
> too many large spacers every few inches .....but you have to make
> it.
>> 73 Kees K5BCQ
> - - -
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