As stated, loss of a connector and its connection to the cable should be so
low as to be hard to measure at HF. I include both insertion loss as well
as mismatch loss. This assumes a good installation and a properly designed
connector. I have seen poorly designed connectors that originate from a
screw machine shop that that has extra capacity so they start to make
connectors. Electrical and matching are not a consideration with these
kinds. Fortunately, few end up where we are likely to see them.
Installation can be bungled to the extent that loss is increased from what
it should be. Assuming that all of us on this reflector take care to do a
good job, loss of the connectors should be ignored with little loss of
sleep.
Al
N6TA
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com]On Behalf Of Steve Katz
Sent: Wednesday, April 28, 2004 10:31
To: 'Steve Meuse'; lladerman@earthlink.net; towertalk@contesting.com
Subject: RE: [BULK] - Re: [TowerTalk] 9913; Rotor loops
> Of course, I personally don't know what the loss figures are for
> connectors, and It's always been something of a mystery. I've heard
> uniformed people mention out loud, about .5db per break, but I don't have
> a
> clue.
>
> ::Evidently, most don't. You can't claim any particular loss per splice
> without specifying the frequency and materials used. As I've demonstrated
> at too many radio club meetings and technical conferences to count, I can
> make twenty splices in a standard RG213/U cable using type N UG-21B/U
> connectors and double female N barrels (UG-29B/U) introducing <1.00 dB
> loss at 1 GHz; that's <0.05dB/fitting...at 1000 MHz. Ditto the data using
> UHF type PL-259s and PL-258 barrels, if the frequency is adjusted down to
> 30 MHz. A high quality UHF or N coaxial connector has no more loss, when
> properly installed, than an equivalent length of .405" diameter coaxial
> cable, using UHFs to about 300 MHz and Ns up to at least 3 GHz. Keywords
> are "properly installed" and "high quality." I've never seen anything
> remotely close to ".5 dB per break" (assuming a "break" is a pair of
> connectors, installed on the cable, and plugged into each other) at
> frequencies below 3 GHz. -WB2WIK/6
>
>
>
> -Steve
> N1JFU
>
>
>
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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