RG-393 is pretty stiff to wrap around a ferrite. RG-142 is good for over 3KW average power on 28Mhz and below. The PEP/CW rating is higher do to less heating. This is well above the rating for RG-213
There is dissipation in a ferrite core choke in the resistance coupled from the ferrite core. It is the coax shield that gets hot, not the ferrite (although the heat in the coax may be transferred to
I should have added that the above dissipation is the result of common mode current, NOT differential mode current. The power can be computed as I squared R or E squared divided by R, where R is the
Jim, That is such a revolutionary statement that I felt I must investigate it. So I loosely wound 4 turns of PTFE wire on a Type 43 toroid - the wire was barely touching the toroid. The impedance mea
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Thu, 12 Feb 2015 12:48:41 -0500
Sounds more like you inductively coupled the RF to the cores using them as a load, rather than as an in line chole 73 Roger (K8RI) That is such a revolutionary statement that I felt I must investigat
Yes - that's exactly what happens with the common-mode current in a choke! I could just as easily have wound the toroid with coax, had a differential-mode signal flowing in the coax, and driven commo