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Old 13-12-2013, 06:40   #1
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VHF Static After Reception

Our Uniden MC950 VHF is having a problem with a burst of static after receiving a transmission. It lasts for a second or two and has been getting progressively worse over the last year or two. We can still communicate, but it means annoying pauses while we wait for it to stop. Any ideas?
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Old 13-12-2013, 07:07   #2
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Re: VHF Static After Reception

That 'hash' sound is broadcast on all VHFs but many dont seem to receive it anymore, maybe its filtered out in many new VHFs.

If you have it I dont think you can get rid of it.

But, I'm no expert....
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Old 13-12-2013, 08:56   #3
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Re: VHF Static After Reception

That noise isn't "broadcast", it's receiver noise that is normally suppressed through the receiver squelch circuitry. Try turning your squelch up a little bit. If that doesn't work, turn everything else off to rule out an external interference problem. If it still does it, sounds like the radio's squelch circuitry is failing.

Eric
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Old 13-12-2013, 10:14   #4
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Re: VHF Static After Reception

Quote:
Originally Posted by fairbank56 View Post
That noise isn't "broadcast", it's receiver noise that is normally suppressed through the receiver squelch circuitry. Try turning your squelch up a little bit. If that doesn't work, turn everything else off to rule out an external interference problem. If it still does it, sounds like the radio's squelch circuitry is failing.

Eric
Just in case you were wondering, fairbank56 is giving you excellent advice.
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Old 14-12-2013, 11:07   #5
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Thanks very much, eased off the squelch a bit, and the problem is much reduced. Damn, I love this site, so helpful.
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Old 14-12-2013, 14:19   #6
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Re: VHF Static After Reception

Just to add to your already excellent advice; try to get into the habit of adjusting the squelch regularly.

This control is one of the most misunderstood and least used function on the radio. It often is knocked or otherwise inadvertently maladjusted; often without the user being aware of it. Turned too far one way, you will miss distant or weak transmissions. Of course, too far the other way and the result is obvious (hash or continuous receiver noise).
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