On 08/20/2017 10:34 PM, Jim Brown wrote:
One turn will work fine. Although I haven't done any measurements to
confirm it, I wouldn't worry about the loose fit. Check out this data
sheet and note the plot of Z for 1-3 turns at the bottom of the page.
For a 6M choke, I'd use two turns on a core, placing multiple 2-turn
chokes in series along the cable. That's NOT two turns through multiple
cores in series, but two turns through core #1, then a short length (an
inch or less) of coax and another two-turn choke, and another.
In solving receive noise problems on 6M I have done just that after
looking at the Fair-Rite data sheets: two turns per core with
multiple chokes in series as needed. It worked well.
It has been many years since I made a serious effort to deal with
receive noise on 2M and back then it was a haphazard approach using
whatever I had on hand. I have little or nothing on hand this time
so I am trying to make sensible purchasing decisions.
73,
Paul N1BUG
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|