| Author |
Message |
Bob Dozier
Guest
|
 Posted:
Wed Apr 06, 2005 2:50 am Post subject:
compression or crimp |
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Those of you who have had 'hands on' - which do you think is best
for terminating F, RCA, and BNC fittings? Pros and cons? Thanks |
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Ed Nielsen
Guest
|
| Posted:
Wed Apr 06, 2005 5:26 am Post subject:
Re: compression or crimp |
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Bob Dozier wrote:
| Quote: | Those of you who have had 'hands on' - which do you think is best
for terminating F, RCA, and BNC fittings? Pros and cons? Thanks
Compression, without a question. |
Hex-crimp creates 6 points of impedance mismatch, which is a source of
reflections. Reflections, of course, can cause standing wave (analog)
and/or packet collision (digital). I once went on a service call where
a few of their DirecTV channels were missing. Not a few transponders,
but a few channels. Replaced the hex-crimp fittings at the LNB, and
back they came.
Compression fittings also have a much higher return loss (>30dB) than
hex-crimp (~18dB).
I once saw a copy of a sweep trace of a high rise building in which
hex-crimp fittings were used. You could see every floor on the trace.
Compression fittings have a better pullout strength than hex-crimp.
Most of them also have internal O-rings, which makes them more moisture
resistant.
They may be a little more expensive (not that much, though), but the
time saved in both the initial installation and subsequent service calls
(there won't be any with compression fittings done right) makes them
well worth the extra few cents.
You can read a little more about some compression fittings here
<http://www.cencom94.com/gpage1.html>. |
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Bob Dozier
Guest
|
| Posted:
Wed Apr 06, 2005 5:53 pm Post subject:
Re: compression or crimp |
|
|
Thanks for your post. Can anyone recommend a compression tool? Some RJ45
tools
are no good all. Any recommendation of a source of compression tools and
connectors
for F, RCA, and BNC fittings?
Thanks!
....Bob
"Ed Nielsen" <egnlsn@comcast.net> wrote in message
news:tdGdnWLdLcZxp87fRVn-tA@comcast.com...
| Quote: | Bob Dozier wrote:
Those of you who have had 'hands on' - which do you think is best
for terminating F, RCA, and BNC fittings? Pros and cons? Thanks
Compression, without a question.
Hex-crimp creates 6 points of impedance mismatch, which is a source of
reflections. Reflections, of course, can cause standing wave (analog)
and/or packet collision (digital). I once went on a service call where
a few of their DirecTV channels were missing. Not a few transponders,
but a few channels. Replaced the hex-crimp fittings at the LNB, and
back they came.
Compression fittings also have a much higher return loss (>30dB) than
hex-crimp (~18dB).
I once saw a copy of a sweep trace of a high rise building in which
hex-crimp fittings were used. You could see every floor on the trace.
Compression fittings have a better pullout strength than hex-crimp.
Most of them also have internal O-rings, which makes them more moisture
resistant.
They may be a little more expensive (not that much, though), but the
time saved in both the initial installation and subsequent service calls
(there won't be any with compression fittings done right) makes them
well worth the extra few cents.
You can read a little more about some compression fittings here
http://www.cencom94.com/gpage1.html>. |
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| Back to top |
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Ed Nielsen
Guest
|
| Posted:
Wed Apr 06, 2005 6:22 pm Post subject:
Re: compression or crimp |
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<http://www.cencom94.com/gpage.html2.html> for tools (The CPLCCT-LM will
do all 3 connectors of the Digicon (F-Conn) brand), and
<http://www.cencom94.com/gpage1.html> for the connectors.
CIAO!
Ed N.
Bob Dozier wrote:
| Quote: | Thanks for your post. Can anyone recommend a compression tool? Some RJ45
tools
are no good all. Any recommendation of a source of compression tools and
connectors
for F, RCA, and BNC fittings?
Thanks!
...Bob |
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| Back to top |
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Bob Dozier
Guest
|
| Posted:
Wed Apr 06, 2005 8:59 pm Post subject:
Re: compression or crimp |
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|
Again, thanks for your post. Yet another question from this newbie...
It seems that there are different connectors for braided cable and
quad-shield?
- S-Series BNC Connectors for RG 59
- S-Series BNC Connector for RG 59 Quad-Shield Cable
Since I have not purchased the Siamese RG-59 cable yet (this is for CCTV
cameras), which
is considered the best way to go 95% copper braid or quad-shield? There is
much info
available when I google - just wanted some suggestions from those with
experience with
it. Thanks!
....Bob
"Ed Nielsen" <egnlsn@comcast.net> wrote in message
news:bOWdnSN5nfRWbc7fRVn-uA@comcast.com...
| Quote: | http://www.cencom94.com/gpage.html2.html> for tools (The CPLCCT-LM will
do all 3 connectors of the Digicon (F-Conn) brand), and
http://www.cencom94.com/gpage1.html> for the connectors.
CIAO!
Ed N.
Bob Dozier wrote:
Thanks for your post. Can anyone recommend a compression tool? Some RJ45
tools
are no good all. Any recommendation of a source of compression tools and
connectors
for F, RCA, and BNC fittings?
Thanks!
...Bob |
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| Back to top |
|
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Ed Nielsen
Guest
|
| Posted:
Thu Apr 07, 2005 3:57 am Post subject:
Re: compression or crimp |
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Copper-braid cable is best for CCTV. NEVER to be used for CATV, though.
Just the connectors for standard RG 59, not quad.
CIAO!
Ed N.
Bob Dozier wrote:
| Quote: | Again, thanks for your post. Yet another question from this newbie...
It seems that there are different connectors for braided cable and
quad-shield?
- S-Series BNC Connectors for RG 59
- S-Series BNC Connector for RG 59 Quad-Shield Cable
Since I have not purchased the Siamese RG-59 cable yet (this is for CCTV
cameras), which
is considered the best way to go 95% copper braid or quad-shield? There is
much info
available when I google - just wanted some suggestions from those with
experience with
it. Thanks!
...Bob |
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| Back to top |
|
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Bob Dozier
Guest
|
| Posted:
Fri Apr 08, 2005 5:30 am Post subject:
Re: compression or crimp |
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|
Many thanks!
....Bob
"Ed Nielsen" <egnlsn@comcast.net> wrote in message
news:9Kidnc5acqYa6snfRVn-qQ@comcast.com...
| Quote: | Copper-braid cable is best for CCTV. NEVER to be used for CATV, though.
Just the connectors for standard RG 59, not quad.
CIAO!
Ed N.
Bob Dozier wrote:
Again, thanks for your post. Yet another question from this newbie...
It seems that there are different connectors for braided cable and
quad-shield?
- S-Series BNC Connectors for RG 59
- S-Series BNC Connector for RG 59 Quad-Shield Cable
Since I have not purchased the Siamese RG-59 cable yet (this is for CCTV
cameras), which
is considered the best way to go 95% copper braid or quad-shield? There
is
much info
available when I google - just wanted some suggestions from those with
experience with
it. Thanks!
...Bob |
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