[HCARC] Antenna Tuners a PS to my earlier.

[ALoneStarYank at aol.com]

sorry, another PS..  If you are choosing a tuner, remember  that in today's 
ham radio rooms there are computers. If you are using an old,  "open" tuner 
there is a chance that rf will be flowing throughout your shack and  some 
of this rf may "get into" your computer system usually through the keyboard  
cable or even the keyboard itself. Although you may try to re-route wiring, 
on  specific bands and at power levels as low as 50 watts your transmitted 
signal  could create havoc with your logging program. This has happened to me 
at several  ham stations, one right in the middle of a contest! The 
solutions are  varied. Mainly, you want your tuner to be shielded with metal all 
around it. If  you purchase the MFJ 945 series tuner please be aware that the  
sides of the tuner are plastic and not metal. You can either replace the 
sides  with metal or an easier route, which I have done many times, is to take 
the side  pieces off and then glue aluminum foil to the inner face of these 
pieces with an  over lap so when you re-install them the foil makes a good 
contact with the rest  of the metal case. (You can then trim any exposed 
excess)   This is  another example of when you are considering the purchase of 
a tuner you examine  it closely for any potential problems. Also check the 
chassis SO-239 connectors.  MFJ has a habit of just pop-riveting them to the 
case. If you use this method  the pop-rivets may not make decent electrical 
contact and open you up to a world  of problems. Check them and it would 
also be wise to drill one out and replace  it with a screw and nut. I've found 
several rivets that were loose.  By the  way, there usually is a grounding 
lug on your tuner.... use it.
 
Bob  W2IK
 
 
In a message dated 10/8/2012 4:42:29 P.M. Central Daylight Time,  
qltfnish at omniglobal.net writes:

We are  blessed with a whole bunch of club members who "KNOW THEIR STUFF" 
and 
with  a forum where we can take advantage of the ability to ask and have  
answered our questions about stuff.

I am blessed with people who  help me manage my frustration by answering my 
questions both in the  complex (which I use for learning) and the more 
simplistic which I use to  keep me from royally screwing up in the 
immediate 
timeframe.  Both  are immensely valuble.

Gary J
N5"BAA"

----- Original Message  ----- 
From: "Lee Besing" <lee at besing.com>
To:  <HCARC at mailman.qth.net>
Sent: Monday, October 08, 2012 4:22  PM
Subject: Re: [HCARC] Antenna Tuners a PS to my earlier.


>  W2IK knows his stuff... He's proven it to me, many times over.   :-)
>
>
> Lee Besing
> 210-771-7075 (  voice/text)

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