[time-nuts] Isolation and insertion loss of Minicircuits splitters

Dr. David Kirkby (Kirkby Microwave Ltd) drkirkby at kirkbymicrowave.co.uk
Sun Jul 19 10:51:47 EDT 2015


On 19 July 2015 at 13:39, Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> One thing worth checking:
>
> The impedance at the “sum” port may or may not be 50 ohms. It’s worth
> checking before you
> go to extreme lengths to come up with a “perfect” 50 ohm amp.
>
> ======
>
> Since part of the world likes 75 ohms, it’s also worth taking a look at
> the isolation numbers
> with the sum port terminated in 75 (or 75 / 4) ohms. There are a number of
> high power / low
> noise amps out there (apparently) designed for cable distribution systems.
>
> Bob
>


These are definitely designed as 50 Ohm splitters - I have the data sheet
on them.


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