i have a few rolls of 7/8 if anyone is in need mid mich area ill
never use all i have ..mike n8obu
-- In Repeater-Builder@yahoogroups.com, Paul Kelley <[EMAIL PROTECTED]>
wrote:
> I've used 75 ohm line for everything from repeaters to
> moonbounce. Years ago I used to make the quarter wave
On Wednesday 21 January 2004 08:51 am, kf4vgx wrote:
> I see you logic But Im wondering how it receives compared
> to Rg8 U / 213 etc ?. I've Got about 300 ft of the 75 ohm
> but never used it . Just wanted to see something in plain
> writing on how well 75 ohm will receive
Unless you've got a rea
Everyone seems to have the right idea, therefore, another reply
probably isn't necessary.. However..
If we're going into the testimonials, I am using 200 feet of 1/2 inch
75 ohm aluminum on a 440 MHz repeater with no means of matching. You
can effectively build a matching stub with 60 whateve
I have no personal experience with aluminum TV line, but I will relate what
Joe Reisert, W1JR, wrote in Ham Radio magazine years ago. Joe was an avid
V/UHF dx'er and moonbounce'er and at one point he dismantled all his arrays
and measured all the various feedlines and phasing lines, most of which h
t: Re: [Repeater-Builder] Re: 75 to 50 ohm match
Author: at Internet_mail
Date:1/21/2004 5:29 PM
I can vouch for this,found no discernable difference on VHF between a
run of 7/8 Andrews and a run of jacketed CATV aluminum. Identical
performance,cheaper price and no matching stubs.73,Lee,
Sent: Wednesday, January 21, 2004 10:05 AM
Subject: Re: [Repeater-Builder] Re: 75 to 50 ohm match
> I have seen 75 ohm cable work well with 50 ohm systems. The slight
loss
> due to VSWR is offset by less loss in 75 ohm over 50 ohm for the
same
> size cable. If one wants to trim the c
I have seen 75 ohm cable work well with 50 ohm systems. The slight loss
due to VSWR is offset by less loss in 75 ohm over 50 ohm for the same
size cable. If one wants to trim the cable to provide a perfect match I
would suggest this method. Measure the power at the output of the
transmitter into
I see you logic But Im wondering how it receives compared to Rg8 U /
213 etc ?. I've Got about 300 ft of the 75 ohm but never used it .
Just wanted to see something in plain writing on how well 75 ohm will
receive
> I've used 75 ohm line for everything from repeaters to
> same can be said
I've used 75 ohm line for everything from repeaters to
moonbounce. Years ago I used to make the quarter wave
matching sections out of copper/brass tubing, and they
worked fine. But for the last several years I just cut the
line to provide low SWR. Assuming your antenna is close to
50 ohms, you
It's nice that you had good SWR but so does my dumb load. Do you sweep it
with something like a site master?
Be neat to see.
Russ, W3CH
- Original Message -
From: "randy kisthardt" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, January 21, 2004 12:08 AM
Subject: [Repeater-
I have been using catv hard line for 10 years and when i first used it
i made some matching transformers from copper pipe and compared it to
the line with out and didnt see aney differance swr or power or how
well the rx worked i still use it have several runns of differant
lengts and sizes and i
As Ken mentions, you would probably consider
sections of quality 50 ohm cable. Going a
little more down the road, one would probably
cancel the resultant reactance with a variable
capacitor. The network would be band specific.
Ham Radio Magazine had a nice writeup with
the theory some years
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