[RFI] Maintaining 50 Ohms...

Dave dave at nk7z.net
Sat Sep 18 08:50:50 EDT 2021


Actually, I just thought of this, I will add them to my 1:1 ferrite 
choke!!  That way, I don't have to build anything but a PC board.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 9/17/21 6:25 PM, Jim Brown wrote:
> On 9/17/2021 5:54 PM, David Eckhardt wrote:
>> The value is anything over 10 kohms.  The disturbance
>> to the 50-ohm impedance is completely negligible.  The rule-of-thumb 
>> on the
>> resistor value is something over 10X the system impedance.  I've even 
>> used
>> 1k successfully.
> 
> A limiting factor for low values is dissipation in the bleed resistor.
> 
> 73, Jim K9YC
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