[ARC5] A simple receiver improvement

[Glen Zook]

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


Website:  http://k9sth.com



On Tuesday, January 14, 2014 11:58 AM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
 
On 14 Jan 2014 at 6:58, John Hutchins wrote:

> Ken -
>     You talking a cheap TV-FM  type 75:300   trasformer?
> Hutch

Yes. I am amazed that it really does any good at 3.5 MHz, but it does.

BTW, this is NOT my idea: I have read of some others trying this with other 
old HF receivers, and having good results.

Ken W7EKB
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