[Boatanchors] Re: GB> An Old Idea - and a caution!

[Al Klase]

Gang,

Jim's quite right.  But, if you really want to do this you need proper 
magnetics.  You can buy binocular cores for about 80 cents that will 
work well form about 100 KHz to 50 Mhz.  There are plans on my website 
for splitters and matching transformers.
http://www.skywaves.ar88.net/ANTENNA/antsys.htm

73,
Al

N2EY at aol.com wrote:
> In a message dated 7/31/08 12:58:57 PM Eastern Daylight Time, 
> gswynar at durham.net writes:
>
>
>   
>> I recall reading years ago about using one of those ubiquitous 75-ohm 
>> unbalanced to 300-ohm balanced TV baluns (you know the kind I mean---it seems 
>> EVERY VCR ever sold in the 80's came with at least one in the box!) for coupling 
>> coax-fed antennas to the balanced twin-lead antenna terminals of vintage 
>> receivers...well, I'm happy to say that REVERSE connections are just as 
>> effective.
>>     
>
> That depends on what balun you use. 
>
> Some of those baluns are useful down to 80 or 160 meters. Others become very 
> lossy below Channel 2. 
>
> Some models are so lossy at HF that they were used as a sort of high-pass 
> filter to eliminate TVI! Sometimes two would be used, back-to-back, in coax-TV 
> applications where the outer shield of the coax was acting as an antenna.
>
> Use of TV baluns at HF is definitely worth a try, but be aware that some 
> baluns will work better than others.
>
> 73 de Jim, N2EY
>
>
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>   

-- 
Al Klase - N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/