[TenTec] 450 Ohm feedline

[NJ0IP]

My shack is two floors above our telephone computer (don't know the English
name for that little black box).  I originally ran a cable upstairs with 4
wires inside (not twisted) but it was shielded.  I had lots of hum and
static noises on the line.  After a couple of years I replaced it with
twisted and shielded line and there was no more hum or static noises.

73
Rick

-----Original Message-----
From: tentec-bounces at contesting.com
[mailto:tentec-bounces at contesting.com]On Behalf Of Chuck (Jack) Hawley
Sent: Thursday, April 15, 2004 11:40 PM
To: tentec at contesting.com
Subject: RE: [TenTec] 450 Ohm feedline


Actually I think a great benefit is from reducing crosstalk from adjacent
pairs. The benefit of twisting tends to be significant up to around
30MHz...by one account I read.

Chuck, KE9UW

> -----Original Message-----
> From: tentec-bounces at contesting.com
> [mailto:tentec-bounces at contesting.com]On Behalf Of Robert & Linda McGraw
> K4TAX
> Sent: Thursday, April 15, 2004 20:57 PM
> To: tentec at contesting.com
> Subject: Re: [TenTec] 450 Ohm feedline
>
>
> Regarding twisting the feed-line, why do you suppose the phone company
> called it "a twisted pair"?  Answer: because that what it was and it was
> used to maintain symmetry and thus reduce induced voltage from overhead
> power lines.  Same applies here.
>
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