[Elecraft] USB Noise core gets hot when operating FT*?

[Jim Brown]

On 4/18/2020 5:46 PM, AE4PB at carolinaheli.com wrote:
> I felt the ferrite core was HOT. The cable didn't feel hot at all.
> I'm using a 20m hamstick in the office as my antenna.

That's an "un-natural act" -- the antenna is not designed for that 
application, and, among other things, requires a good connection to the 
chassis of a vehicle or something similar to act as a counterpoise. 
Without a counterpoise, the coax acts as a radial. At the very least, 
you should provide radials to act as a counterpoise.

There are thousands of ferrite parts, all of them very different from 
each other. Exactly WHICH "ferrite core" are you using (part number, 
mfr, mix), where is it in the system? Are multiple turns wound through it?

73, Jim K9YC