[Elecraft] RFI in audio chain

[Joe Subich, W4TV]

*NO!* Do not connect the shield to *either* pin 1 (mic hot) or pin 7
(mic return) of the Foster connector.  If you must connect the shield,
connect it to the *shell* of the Foster connector (chassis).  Chassis
*with no intervening component/impedance* is the only appropriate
connection for a shield.

73,

    ... Joe, W4TV


On 11/22/2015 9:28 PM, Bob McGraw - K4TAX wrote:
> And if you happen to have the connector(s) that do not have a dedicated
> ground terminal, then connect the shield and white wire to pin #1, at
> the radio end of the cable and leave the shield floating or not
> connected at the mike end.
>
> 73
> Bob, K4TAX
>
> On 11/22/2015 8:20 PM, Bob McGraw - K4TAX wrote:
>> Oh but it is.  There is pin #1, pin #2 and pin #3 plus a ground
>> terminal.  The cable between the mike and radio should be 3 conductor
>> shielded.  Thus  - Red, Black, White and shield.  And the shield
>> should be connected at one end only, preferably the signal receiving
>> end or mike connector at the radio.  That way, there is no current
>> flowing on the shield.
>>
>> 73
>> Bob, K4TAX
>>
>> On 11/22/2015 8:07 PM, Bill wrote:
>>> Make sure your mic wire's shield is properly grounded (both ends) -
>>> remember, XLR was not designed for RF use.
>
>
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