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.
*Except* with a transmitter. Connecting the shield to one side of the
mic element provides a path for any common mode current reaching the
rig directly *into* the mic circuits! *NEVER* connect the shield of
any mic cable to the mic return - it only makes any "pin 1 problem"
much worse.
73,
... Joe, W4TV
On 11/22/2015 9:20 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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