[ARC5] A simple receiver improvement

[RAY FRIESS]

Glen ...
You mentioned in your article the Hammarlund HQ 140.    Do your observations also apply to the later Hammarlunds?
I have an HQ 180, HQ 145, and an HQ 170.
Ray  wa7itz

> Date: Tue, 14 Jan 2014 13:54:45 -0500
> From: jeepp at comcast.net
> CC: arc5 at mailman.qth.net
> Subject: Re: [ARC5] A simple receiver improvement
> 
> Looks like your observation is correct.  I pulled out one of those 
> coaxial-looking TV baluns and hooked it up with a BNC to F adaptor. I 
> got remarkable loss (1uv vs. about 3uv or 10db) when used with a 
> BC-454A.  These must be olde tyme.  Guess I'll be looking at Parts 
> Express.  TNX!
> Jeep -K3HVG
> 
> On 1/14/2014 1:27 PM, Glen Zook wrote:
> > Although definitely not an "exact" match, television baluns can work wonders in matching the usual 50-ohm coaxial cable antennas to older receivers.
> >
> > Modern baluns make it down to at least 5 MHz and usually will work on 80-meters, 160-meters, and even lower frequencies.  The "olde tyme" baluns often didn't make it much below 50 MHz but, because of various signaling on cable television, television baluns now make it down to at least 5 MHz.
> >
> > Parts Express has a suitable balun for $0.79 in single quantities, $0.65 each in the 10 to 49 quantity, and $0.58 each in quantities of 50, or more.
> >
> > http://www.parts-express.com/75-to-300-ohm-matching-transformer--180-010
> >
> >
> > I have been promoting use of television baluns for well over a decade even in an article in Electric Radio.  The text of that article can be found at:
> >
> > http://k9sth.com/uploads/TV_baluns.pdf
> >
> >   
> > Glen, K9STH
> >
> >
> >
> 
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