HI, Sergio.
The Time cable I'm certain is 75 ohm CATV cable, 3/4 inch and 1/2 inch
respectively...and the J is probably Jacketed?
The Commscope is probably similar in characteristics...
The CATV hardlines work just fine, especially for HF through UHF. You can
use them with or with matching transformers...it just depends whether your
particular situation needs them or not. I'm feeding several 40 through 160
antennas with it directly and havent really felt the need to use
transformers.
There are several ways to terminate that cable, depending somewhat on what
band(s) you will use it on. If you also have access to CATV PIN connectors
and a coring tool cheap, I recommend using those and you can then screw an
N connector onto the outside thread of the PIN connector, cutting the pin
to length and soldering the N connector pin or socket to the end of the pin
so the length comes out correctly when you screw the N body onto the PIN
connector body.
There are several other less elegant, but functional methods using UHF
barrels, copper pipe fittings, etc. that some others can elaborate on, I'm
sure. For UHF and VHF, there is a US guy that makes 1/4 wave matching
stub/connectors that just clamp on the ends of the cable. Those are pretty
slick as well.
73 es have fun!
Ty K3MM
pp5jr@pp5jr.ampr.org on 10/02/97 09:22:31 PM
To: towertalk@contesting.com
cc: (bcc: Tyler G Stewart/BENN/CEC)
Subject: [TowerTalk] INFORMATION ABOUT CABLES
Hello all,
i'm looking for the correct impedance of some types of cables!
TFC TIMES FIBER COMUNICATION T-107500 J
T-10500 J
COMM SCOPE GENERAL INSTRUMENTS
P 3 500 JCA
P 3 750 JCA
IF POSSIBLE I'D LIKE TO RECIVE INFORMATION ABOUT SOME EXPERIENCE WITH THESE
CABLES IN HF, AND IF THEY ARE 75 OHMS I'D LIKE TO KNOW IF IS IT POSSIBLE TO
USE
THEM WITH BALUNS ON EACH SIDE?
Thank you very much for some info!!!
SERGIO PP5JR
AMPRNET - pp5jr@pp5uf-gw-2.ampr.org
MAILBOX - pp5jr@pp5jr.ampr.org
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search
|