[NSRCA-discussion] SPEKTRUM modules for JR transmitters

[JonLowe at aol.com]

In a message dated 6/9/2007 9:53:50 AM Central Daylight Time, 
rbearden56 at bellsouth.net writes:

You must be very careful when dealing with these connectors they cannot be
over tightened without damaging the connector and severely degrading the
transmitters output.  When you are dealing with the Gigahertz range most
connections are N-type OR SMA and you only need to torque then to ABOUT
6inch/oz (FINGER TIGHT).  If you over tighten them you will damage it and
then your output will drop due to reflected energy back into the transmitter
module.  If you treat it like the old stuff it get bad quickly.  Don't
superglue it there is a compound to prevent the connectors from coming loose
that will not ruin it like super glue.

Randy,
You misunderstood what retaining nut I am talking about.  It is NOT a nut 
that completes part of the RF circuit. It is a nut that retains the body of the 
connector in the SPEKTRUM housing, just like the nut that retains an RJ-6 
connector in the back of a cable box or a TV.  If it comes loose far enough, it can 
allow the whole connector body to rotate, pulling loose the connection on the 
circuit board.  It is the flat nut shown at the bottom right of the picture 
below that retains the connector to the plastic housing.

 
Jon Lowe






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