[TenTec] RFI Issues and other station high voltage precautions

[Bob McGraw - K4TAX]

Thanks Stuart.

I choose to build my own using the 4" square utility boxes fitted with good 
quality 20A receptacles, finally ending up with a piece of #12 SJ cable and 
cap to plug-in.  Many of the pre-made "plug strips" rely on the pressure 
contact method, specially for the 3rd pin ground terminal, which I find as 
not satisfactory.

>From the hardware stores, one can obtain duplex boxes that can be ganged 
together such that one ends up with several duplex receptacles as a single 
unit.  Just be sure to find the largest duplex cover plate before starting 
the project.

Speaking of receptacles, I do not use the most convenient means of 
connection, meaning the "strip the wire and push it in the hole" method.  I 
always strip the wire, turn a hook on the end and around the screw it goes. 
White wire on white screw, green wire on green screw and black wire on the 
brass colored screw.  If one so chooses, they can get a duplex unit that 
contains a switch and a single receptacle such that the unit can be used to 
switch the entire group on and off.

Using this system allows all of the equipment for the station to share the 
same neutral and same 3rd pin ground connection.  In general, ground loops 
are eliminated, and a high degree of station safety is attained, all while 
it becomes very convenient to disconnect the entire station and all 
accessories when one is not using the station.

As a note, our home was built in 1980 and the outlets and switches used the 
method of stripping the wire and pushing it in the hole in the back.  Over 
the past few years I've discovered these have become intermittent and have, 
in many cases, shown some degree of heating.  Basically I've replaced every 
duplex outlet and switch and in doing so, I did not use the strip and push 
the wire in the hole method of connection.  Although the method originally 
used was "legal" per the NEC and a time saver for the electrician, I find 
that it isn't good enough over time to satisfy me.

Another application available with the "roll your own" outlet strip is to 
incorporate a LINE NOISE FILTER such as a device made by CORCOM.  These 
provide a high level of noise filtering for the AC line.  Units can be 
purchased that fit into a duplex box or stand alone configuration. 
Incorporate one of these in the power strip to reduce any noise coming from 
the power line.  There's various CORCOM filters having different specs. 
Choose one to fit your needs, physical size, and power handling rating, to 
clean up the AC power to your station.

Ham radio is really a great hobby, have fun, be creative BUT at all times BE 
SAFE!

73
Bob, K4TAX




----- Original Message ----- 
From: "Stuart Rohre" <rohre at arlut.utexas.edu>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Friday, May 18, 2012 5:18 PM
Subject: Re: [TenTec] RFI Issues and other station high voltage precautions


> Great idea on plug box, Bob!
> Thanks for mentioning --unplug for most safety.
>
> 73,
> Stuart Rohre
> K5KVH
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