Topband: 75 ohm RG6 to 50 Ohm radio

[Ed Stallman]

Tnx Tree , I plan to do just that using my AIM 4170 . May be a day or 
so, have suitcase company on the way

Ed N5DG


On 9/28/2016 1:09 PM, Tree wrote:
> One easy thing you can do to test your transformer is to put a 75 ohm 
> resistor on the proper side - and then use an SWR meter to measure the 
> impedance on the 50 ohm side.  I like to also see how high in 
> frequency I can go before the SWR starts to rise.  Most of the 
> transformers I wind typically work pretty well up to 7 or 10 MHz.
>
> If you don't have an SWR meter - you can use your transmitter set for 
> a power level that won't burn up your resistor.
>
> Tree N6TR
>
> On Wed, Sep 28, 2016 at 10:58 AM, Ed Stallman <ed.n5dg at gmail.com 
> <mailto:ed.n5dg at gmail.com>> wrote:
>
>     Thanks all for your wisdom . Some say not needed and some say to
>     use the 75 / 50 transformer . I figure it's easy enuf to do . So
>     now I'll try it and see for my self .
>
>     Thanks again, Ed N5DG
>
>
>     On 9/27/2016 10:35 PM, Ed Stallman wrote:
>
>         My receive antenna is 75 Ohm RG6 connected to my radio and I
>         want to wind a 2873000202 binocular core to step 75 to 50
>         Ohm's . I seen this info on W8JI web page but can't seem to
>         find it again.
>
>         I do remember it's 4 turns 50 Ohm and 5 turns 75 Ohm and all
>         wires come out the same side of the core . Am I correct so far?
>
>         Does it make a difference which winding I wind first ?
>
>         Thanks in advance , Ed N5DG
>
>
>
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