One "trick" that I have adopted when tightening chassis mount BNC and
SMA female connectors is to put a mating connector on the outside of the
connector. That mating connector can be held tightly with pliers or a
wrench without damage to the female connector that you are trying to
tighten, and you can secure the nut with a wrench. The mating connector
may or may not have coax connected to it - that makes no difference.
The other thing that is often shown in manuals which is IMHO incorrect
is that the star washer should go between the grounding lug and the
chassis so the teeth of the star washer bite tightly into the metal of
the chassis as well as into the grounding lug - assuring a good ground path.
Another plus for the latter star washer positioning is that once the
star washer begins to 'bite', the grounding lug is not apt to turn as
you secure the nut.
73,
Don W3FPR
On 4/2/2016 6:52 PM, Ron D'Eau Claire wrote:
Were you only holding the nut while tightening and the ferrule cracked?
That is the first case I've heard of in the 5 years the K3EXREF option has
been shipped so it's possible there's an issue with some units, especially
since there are two cases.
I'm curious because we might need to alter the procedure in the manual a bit
if it's something happening during installation.
73, Ron AC7AC
-----Original Message-----
From: Elecraft [mailto:[email protected]] On Behalf Of Mike
Cox
Sent: Saturday, April 2, 2016 2:59 PM
To: [email protected]
Subject: Re: [Elecraft] KE: issue with installation of K3EXREF interface
Mine broke off too. It appeared for be a crimped ferrule but it split and
fell off as though it were already fractured. I carefully soldered the coax
braid to the connector to maintain the electrical connection. I was careful
not to overheat and melt the dielectric of the coax which could have shorted
the center conductor to the shell. It's working well!
Mike, AB9V
On 4/2/2016 16:16 PM, Jim Spears wrote:
While installing the K3EXREF SMA-TMP cable, I ran into an interesting
issue which I do not yet know if it is a problem or just interesting.
There is a ferrule or something similar over the cable where it
attaches to the SMA fitting that is installed on the back panel.
while tightening the hex nut down, I must have torqued something as
the ferrule broke into two pieces and fell off. I finished off the
installation and verified that the GPSDO does provide a suitable 10 MHz
signal into the radio.
So the question becomes: is this interesting or a problem? I took a
close
look and the problem might be improper grounding of the shield to the
chassis at the SMA connector end.
If it is deemed to be a potential problem, I can request a new cable
from support. It will not take long to replace the cable.
Jim/N1NK
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net Please help support this email
list: http://www.qsl.net/donate.html Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
