[RFI] RF Choke Insertion Loss?

[Al Groff]

If you have significant coupling from the driven element(s) to the coax, 
then adding a common mode choke would change the radiation pattern of 
the system.  But adding the choke would not significantly increase the 
loss IN the coax.

AL, K0VM


On 4/22/2021 2:46 PM, Jim Brown wrote:
> On 4/22/2021 12:36 PM, Tony wrote:
>> This is probably a silly question, but I run QRP/CW when portable and 
>> was wondering if the choke can cause any appreciable insertion loss 
>> on the transmitted signal?
>
> Only if you're using an end-fed antenna without a counterpoise. The 
> choke prevents the antenna from using the feedline as a counterpoise.
>
> 73, Jim K9YC
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi