[Hammarlund] HQ140 - really *LOW* sensitivity

[Glen Zook]

Here is the article on using TV baluns to improve receiver sensitivity in the older receivers that were designed for balanced antenna feeds.

http://k9sth.com/uploads/TV_baluns.pdf


Suitable baluns are available from Parts Express for well under $1.00.

http://www.parts-express.com/

 
Glen, K9STH


Website:  http://k9sth.com


________________________________
 From: Bill Breeden <breedenwb at cableone.net>
To: hammarlund at mailman.qth.net 
Sent: Wednesday, January 16, 2013 12:10 PM
Subject: Re: [Hammarlund] HQ140 - really *LOW* sensitivity
 

Bob,

Don't know what kind of antenna you are using, but all of the Hammarlunds that I have owned have a balanced antenna input with three terminals on the antenna terminal strip.  The terminal strip on my HQ-145 is marked "A", "A", and "G" from left to right.  If you are using any antenna other than a balanced antenna with a balanced feed line, a short jumper or strap should be used to connect the center "A" and right hand "G" terminals together.  I often use a random single wire antenna on the left "A" terminal and the jumper between the other "A" and "G" makes all the difference.