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

[David Gilbert]

Hi, Jim.

I think he was talking about the ferrite core embedded in the USB 
cable.  Check the title of his post.

But for sure, his setup is a really poor one.

73,
Dave   AB7E



On 4/20/2020 11:33 AM, Jim Brown wrote:
> 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
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to xdavid at cis-broadband.com