[Elecraft] RF on power to K3 question

Dear Group, I have determined that the majority of my RF shack problems were related to RF on the power lead to the K3. Winding 7 turns thru a 1" clamp on #31 ferrite has cured the symptoms. With this choke in place everything is even happy on 160m. So let me explain how I power the equipm

Re: [Elecraft] RF on power to K3 question

unning and where your antenna is located relative to your K3. FT -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of gold...@charter.net Sent: Saturday, February 04, 2012 7:03 AM To: elecraft@mailman.qth.net Subject: [Elecraft] R

Re: [Elecraft] RF on power to K3 question

arter.net > Sent: Saturday, February 04, 2012 7:03 AM > To: elecraft@mailman.qth.net > Subject: [Elecraft] RF on power to K3 question > > Dear Group, > > I have determined that the majority of my RF shack problems were > related to RF on the power lead to the K3. Winding 7 tu

Re: [Elecraft] RF on power to K3 question

Don, a spike is not a concern with choke for RF in the range of a few millihenrys such as you created winding a few turns through the ferrite core, but a larger value choke such as is often used for suppressing generator hash and noise on a d-c line can do damage. What happens is that whenever cu

Re: [Elecraft] RF on power to K3 question

Since a common mode choke as is used for RFI suppression is generally wound with both conductors of the power cord (parallel) going through the toroid core, there is no impact on the DC since the field from one wire is cancelled by the field from the other wire. Remember, in any transmission line