How to resolve XLR picking up radio stations

[Ludwig77]

An external mic that I'm using on my Zoom H4 mic is picking up radio
stations. I'm using two external mics. Only one of these two mics is
picking up the stations. Both mics are several feet away requiring me
to use 2 or 3 XLR cables in connection together. Both mics are the
same distance but only one of the pair is picking up the stations.

Any suggestions to fix this?

[Laurence Payne]

On Sun, 2 Dec 2007 12:14:09 -0800 (PST), Ludwig77
> wrote:

>An external mic that I'm using on my Zoom H4 mic is picking up radio
>stations. I'm using two external mics. Only one of these two mics is
>picking up the stations. Both mics are several feet away requiring me
>to use 2 or 3 XLR cables in connection together. Both mics are the
>same distance but only one of the pair is picking up the stations.
>
>Any suggestions to fix this?


Swap cables. Is the same mic still picking up?

[Scott Dorsey]

Ludwig77 > wrote:
>An external mic that I'm using on my Zoom H4 mic is picking up radio
>stations. I'm using two external mics. Only one of these two mics is
>picking up the stations. Both mics are several feet away requiring me
>to use 2 or 3 XLR cables in connection together. Both mics are the
>same distance but only one of the pair is picking up the stations.
>
>Any suggestions to fix this?

What model microphones are they, what kind of cables, and how are the
cables wired? Are both microphones the same kind?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[David Morgan \(MAMS\)]

"Ludwig77" > wrote in message ...
> An external mic that I'm using on my Zoom H4 mic is picking up radio
> stations. I'm using two external mics. Only one of these two mics is
> picking up the stations. Both mics are several feet away requiring me
> to use 2 or 3 XLR cables in connection together. Both mics are the
> same distance but only one of the pair is picking up the stations.
>
> Any suggestions to fix this?

Repair the cables.

[Geoff]

David Morgan (MAMS) wrote:
> "Ludwig77" > wrote in message
> ...
>> An external mic that I'm using on my Zoom H4 mic is picking up radio
>> stations. I'm using two external mics. Only one of these two mics is
>> picking up the stations. Both mics are several feet away requiring me
>> to use 2 or 3 XLR cables in connection together. Both mics are the
>> same distance but only one of the pair is picking up the stations.
>>
>> Any suggestions to fix this?
>
> Repair the cables.

'Several feet away' requiring or '2 or 3 dasiy-chained XLRs' ?!!!

Get one good cable for each mic.

geoff

[Skler]

Neutrik has a really neat new XLR connector with little surface mount RFI
shunt capacitors built in.

[Peter Larsen[_2_]]

David Morgan (MAMS) wrote:

> "Ludwig77" > wrote in message
> ...
>> An external mic that I'm using on my Zoom H4 mic is picking up radio
>> stations. I'm using two external mics. Only one of these two mics is
>> picking up the stations. Both mics are several feet away requiring me
>> to use 2 or 3 XLR cables in connection together. Both mics are the
>> same distance but only one of the pair is picking up the stations.

>> Any suggestions to fix this?

> Repair the cables.

Specifically make your mind up and connect pin 1 to plug body on say the
female XLR's, it is fine to have the plug body floating in device to device
cables, but less fine when using the cables as extenders.


Kind regards

Peter Larsen

[[email protected]]

On Dec 2, 10:35 pm, "Skler" > wrote:
> Neutrik has a really neat new XLR connector with little surface mount RFI
> shunt capacitors built in.

and then use a star quad cable which is built to deal with this(RFI)

[Geoff]

Peter Larsen wrote:
> David Morgan (MAMS) wrote:
>
>> "Ludwig77" > wrote in message
>> ...
>>> An external mic that I'm using on my Zoom H4 mic is picking up radio
>>> stations. I'm using two external mics. Only one of these two mics
>>> is picking up the stations. Both mics are several feet away
>>> requiring me to use 2 or 3 XLR cables in connection together. Both
>>> mics are the same distance but only one of the pair is picking up
>>> the stations.
>
>>> Any suggestions to fix this?
>
>> Repair the cables.
>
> Specifically make your mind up and connect pin 1 to plug body on say
> the female XLR's, it is fine to have the plug body floating in device
> to device cables, but less fine when using the cables as extenders.

Better still, use a single cable - hell he said it was only "a couple of
feet" !

geoff

[Islander]

On Sun, 2 Dec 2007 12:14:09 -0800 (PST), Ludwig77
> wrote:

>An external mic that I'm using on my Zoom H4 mic is picking up radio
>stations. I'm using two external mics. Only one of these two mics is
>picking up the stations. Both mics are several feet away requiring me
>to use 2 or 3 XLR cables in connection together. Both mics are the
>same distance but only one of the pair is picking up the stations.
>
>Any suggestions to fix this?

One needs here to understand why it is so easy to pick up radio
stations.. Remember ... (if your old enough) the crystal set. Or
look up its principals on the net.. The crystal set is a diode..and a
length of wire..(coil sometimes) If the length of wire is tuned to
the same frequency of a source of rf energy the diode will decode the
audio riding on this carrier signal and the amplifier in your board or
amp will do its normal thing. Getting rid of the tuned length is one
way to get rid of the problem but..making sure the two conductors
carrying the original signal required, is well shielded from outside
sources is a better way. I see lots of cheap (poorly shielded) audio
cables on the market these days. So even though the ground is there
with a continuity checker..a very strong ref signal at the right
frequency for the length of wire, may get enough signal in to be a
problem.

Cheers
Marv
CET AES TRCC PTCC