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Movies Forum Index » Movie Production (Sound) Forum » 411a Receiver Noise
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| Andy Turrett |
 Posted: Sat Mar 15, 2008 10:21 am |
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Has anybody experienced this? When I tap on the metal base of the
antenna on my Lectro 411a I hear a tapping sound that gets into the
audio channel. I can also flip the antenna end with my finger and
hear the antenna whipping back and forth also getting into the audio
channel. During the tapping sound there is also a hiss sound that
rises and then disappears. If I don't touch the antennas the receiver
seems to work normally. Is this some kind of grounding problem?
Andy |
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| Guest |
| Posted: Sat Mar 15, 2008 10:24 am |
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On Mar 15, 4:21 pm, Andy Turrett <aturr...@aol.com> wrote:
Quote: Has anybody experienced this? When I tap on the metal base of the
antenna on my Lectro 411a I hear a tapping sound that gets into the
audio channel. I can also flip the antenna end with my finger and
hear the antenna whipping back and forth also getting into the audio
channel. During the tapping sound there is also a hiss sound that
rises and then disappears. If I don't touch the antennas the receiver
seems to work normally. Is this some kind of grounding problem?
Andy
Have you tried a different cable or switching to batteries? |
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| Rob Lewis |
| Posted: Sat Mar 15, 2008 10:41 am |
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On Mar 15, 4:21 pm, Andy Turrett <aturr...@aol.com> wrote:
Quote: Has anybody experienced this? When I tap on the metal base of the
antenna on my Lectro 411a I hear a tapping sound that gets into the
audio channel. I can also flip the antenna end with my finger and
hear the antenna whipping back and forth also getting into the audio
channel. During the tapping sound there is also a hiss sound that
rises and then disappears. If I don't touch the antennas the receiver
seems to work normally. Is this some kind of grounding problem?
Andy
Is it only when you touch the antenna's. Have you tried having
someone else touch them, or another object.
Rob |
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| Jason Porter |
| Posted: Sat Mar 15, 2008 10:56 am |
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Is the P48 or T-Power on?
-JP
On Mar 15, 4:21 pm, Andy Turrett <aturr...@aol.com> wrote:
Quote: Has anybody experienced this? When I tap on the metal base of the
antenna on my Lectro 411a I hear a tapping sound that gets into the
audio channel. I can also flip the antenna end with my finger and
hear the antenna whipping back and forth also getting into the audio
channel. During the tapping sound there is also a hiss sound that
rises and then disappears. If I don't touch the antennas the receiver
seems to work normally. Is this some kind of grounding problem?
Andy |
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| Andy Turrett |
| Posted: Sat Mar 15, 2008 11:13 am |
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Running on batteries or using a different xlr cable does not make a
difference. In further experiementing I do hear the tapping when I
tap on the power cable but not the XLR cable. I also realize that the
whole receiver housing seems to be sensitive to tapping and I can hear
it in that audio channel on my mixer.
I've tried tapping the antennas and receiver housing with a non-
conducting object and I still hear the tapping.
Andy |
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| vin |
| Posted: Sat Mar 15, 2008 11:20 am |
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this has been covered in the FAQ on the Lectrosonics site.
-vin |
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| Andy Turrett |
| Posted: Sat Mar 15, 2008 11:22 am |
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T-power and 48 phantom are both off. On the occasion that I have left
on the phantom it never created this mircophonic type effect on the
housing of a Receiver.
I've taken one of my other 411a Receivers and plug it into the same
power and xlr cable and I do not experience this microphonic problem.
So I am guessing it is something internal to this receiver.
Andy |
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| Andy Turrett |
| Posted: Sat Mar 15, 2008 11:35 am |
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Vin,
The only thing close I could find in Lecto's FAQ is titled:
"What causes noise in the receiver if I tap or hit the case of the
transmitter? Or if I tap the mic cable?"
That does not apply to my situation since the noise is when I hit the
Receiver not the Transmitter.
Quote: this has been covered in the FAQ on the Lectrosonics site.
-vin |
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| Andy Turrett |
| Posted: Sat Mar 15, 2008 1:45 pm |
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Thanks Larry,
I'll call in and make arrangements for repair.
Andy |
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| Larry Fisher |
| Posted: Sat Mar 15, 2008 5:53 pm |
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Hi Andy,
There may be a poor solder joint on a shield in the receiver, a
cracked ceramic resonator in an oscillator or a cold solder joint in
the same area. If it is an original assembly problem (i.e., our fault)
we don't charge to fix the unit. I can ask Dean in customer service if
there is any problem that causes your symptoms but it sounds like a
trip to the mother ship. As I understand it, substituting a different
receiver clears up the problem, so it sounds like the receiver is
broken.
Best Regards,
Larry Fisher
Lectrosonics
On Sat, 15 Mar 2008 14:35:58 -0700 (PDT), Andy Turrett
<aturrett@aol.com> wrote:
Quote: Vin,
The only thing close I could find in Lecto's FAQ is titled:
"What causes noise in the receiver if I tap or hit the case of the
transmitter? Or if I tap the mic cable?"
That does not apply to my situation since the noise is when I hit the
Receiver not the Transmitter.
this has been covered in the FAQ on the Lectrosonics site.
-vin |
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