[Elecraft] K3 loss of rx signal

[donovanf at starpower.net]

BNC connectors rate high for convenience and low for performance, 
especially leakage performance. 


BNC connector leakage typicallymeasures in the range from -25 to 
-50 dB vs -60 to -90 dB for N connectors. Any BNC connector 
that does not fit snugly should replaced and discarded 


73 
Frank 
W3LPL 




----- Original Message -----

From: "Ron D'Eau Claire" <ron at cobi.biz> 
To: "Edward R Cole" <kl7uw at acsalaska.net>, "Elecraft Reflector" <elecraft at mailman.qth.net> 
Sent: Tuesday, April 4, 2017 2:12:03 AM 
Subject: Re: [Elecraft] K3 loss of rx signal 

Note that BNC connectors can easily handle a kW of RF power unless there is 
a high SWR on the line. They are rated for 500V. 

73 Ron AC7AC 

-----Original Message----- 
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Edward 
R Cole 
Sent: Monday, April 3, 2017 6:24 PM 
To: Elecraft Reflector 
Subject: Re: [Elecraft] K3 loss of rx signal 

Simple - use something better than PL-259's: 

I mainly use N connectors for low loss/high power and BNC for low power 
inside the shack connections. I also have TNC and sma connectors. 

Most connectors need a 1/4 turn beyond finger tight for reliable 
connections. Sure cure for loose connectors is heat shrink over them. Not 
only seals from wx but also loosening due to vibration. 

Want to see what vibration does? Install a radio in a D8 cat without some 
kind of vibration damping. I did long ago, and the Motorola 100w VHF radio 
was a cabinet full of loose parts after 8-hours running of the cat. Wonder 
why military radios are full of glyptol, or completely potted in plastic? 

73, Ed - KL7UW 
http://www.kl7uw.com 
Dubus-NA Business mail: 
dubususa at gmail.com 

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