RG142 uses a steel core with copper plating for a center conductor.
RG400 is the exact same stuff but with a twisted stranded center
conductor, but each strand is silver plated before twisting. The
stranded center makes it a lot more flexible and useful.
It's good stuff.
LMR (any three or four digit number) is crap.
Motorola says so
<http://www.repeater-builder.com/antenna/recommended-coax-and-connectors-for-iden.pdf>
Andrew says so
<http://www.repeater-builder.com/antenna/andrew-braid-over-foil-imd.pdf>
("of course" you say, from the makers of Heliax... but
the engineering is sound and it's actually worth reading)
Mike WA6ILQ
At 08:20 AM 03/14/09, you wrote:
Thanks for the comment to Neal about the
cables. RG-400 and 142 are very good, quite
common, and very reliable. If you take a look
at the specs on 214 and 400 you might note that
the 400 is rated att 98% shield where as 214 is
at 96% for whatever THAT fact is worth
.probably nothing.. - Mike
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of neal Newman
Sent: Saturday, March 14, 2009 9:23 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] 220 Repeater Power Amp
Get Rid of that crap cable your using..
I only use RG 214, and or superflex for my
inter connects between the repeater, amps in
line(power amp/preamps), and the
duplexer. Mosly 1/4" superflex becuase I got
lots of it. In a pinch I will use RG-142...
Never use that 400 or 9913 garbage..
--- On Sat, 3/14/09, Michael Ryan <mryan...@tampabay.rr.com> wrote:
From: Michael Ryan <mryan...@tampabay.rr.com>
Subject: RE: [Repeater-Builder] 220 Repeater Power Amp
To: Repeater-Builder@yahoogroups.com
Date: Saturday, March 14, 2009, 12:47 AM
Thatâs the model I am using now. I have
some other issues to study before changing to
another amp. But hearing that someone is using
this same amp is encouraging. Like I said
though, I have to check into the actual tuning
of the transmitter to see if I have done
something that is creating my problem. For
those interested, the cables in the rack are all
RG-400, no 9913 or clones, no LMR
stuff...nothing else. Duplexer is Telewave 4
cans, RG-214 cabled, ½â Andrew hardline to the antenna.
-Mike
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Roger White
Sent: Friday, March 13, 2009 5:45 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] 220 Repeater Power Amp
I ran a Mirage C2512G (s/n 30820) for a number
of years at a reduced Pout (around 75 watts out
of duplexer) and had no problems. The amp case
is mounted on a very large heat sink for
repeater use. Its only glitch was a nearby
lightening strike that vaporized the output cap
of the PA. Replaced the cap but never put it
back on line as most users never noticed it wasn't there.
Roger W5RDW
224.18 MHz Dallas
----- Original Message -----
From: <mailto:mryan...@tampabay.rr.com>Michael Ryan
To: <mailto:Repeater-Builder@yahoogroups.com>Repeater-Builder@yahoogroups.com
Sent: Friday, March 13, 2009 4:12 PM
Subject: RE: [Repeater-Builder] 220 Repeater Power Amp
Iâve had several users indicate that they are
using TE Systems Amps in repeater service. I
have one of the OLDER Mirage amps, I think it
has been around here for 12 or more years at
least, perhaps more. This SHOULD be
pre-MFJ. My model is 25 in for 120 out. I
planned to run 10 watts or so in for 75 or so
out. Is this a reasonable choice? - Mike
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Michael Ryan
Sent: Friday, March 13, 2009 11:51 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] 220 Repeater Power Amp
Does anyone have some advice about what to use
for a power amp in a 220 repeater? MIRAGE makes
a 90 watt model they claim is for repeater
service. I donât see anything else
around. Iâd be happy with 60 90 watts MAX
output with maybe 10-20 watts drive. Thanks.. - Mike
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