[NLRS] Looking for RF transformer

[Dan Larson]

You can come very close by winding a transformer
with separate primary and secondary on a Type 43
torroid core or balun core (sometimes called a 
"pig snout")

Use 10 turns for the 50-ohm primary, and 12 turns
for the 75-ohm secondary. The impedance ratio is 
the square of the turns ratio of the primary to 
secondary. In this case 10t:12t will yield 50ohm:72ohm
which is probably close enough. If you use a two
hole balun core (pig snout) then you can wind with
a ratio of 10t:12.5t to get 50ohm:74.4ohm.

Hope this helps.

Dan KC0LUY

On Wed, 27 Oct 2004 10:57:40 -0500, Jason Godfrey wrote:

>Hello.
>
>This is not for a ham radio application, but I thought NLRS may be a good 
>source for what I am looking for.
>
>I need an RF transformer to go from 50 ohms to a 75 ohm load. The transformer
>needs to be good to 100 Mhz, handle around 30 watts full duty cycle, and have
>low Q (good bandwidth.) 
>
>If anyone has one to sell or knows where I could find such a beast, please let
>me know.
>
>Thanks
>- Jason, N0RPM
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