Topband: Commond mode choke for Beverage

[Filipe Lopes]

Thanks for this grounding tip too Jim.


73's Filipe Lopes
CT1ILT - CR6K
F4VPX - TM3M

2015-10-13 4:03 GMT+02:00 Jim Brown <jim at audiosystemsgroup.com>:

> On Mon,10/12/2015 1:27 PM, JC wrote:
>
>> It works like a voltage divider where the impedance to ground should be
>> lower as possible to give you more attenuation  like 1k/500ohms versus 1K/5
>> ohms divider.
>>
>
> Yes.
>
> But to expand on this -- often the interference is coupled into a gain
> stage or RX by a Pin One Problem. ALWAYS make the first connection of any
> cable shield to the shielding enclosure of EVERY active device. Follow this
> rule regardless of the function of the cable -- input, output, control
> line, RF or audio.
>
> It's also good practice to bring RX antennas into the shack via the same
> grounding panel used for TX antennas. And that panel must be tied to local
> ground rods, those rods bonded to all other grounds, to the shack desk, etc.
>
> 73, Jim K9YC
>
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