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Ever since I bought the unit(on eBay),all it does is emit a constant hissing sound. Even turning the squelch on is no help at all. I'm ready to junk it! What say you fellows?

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Repair or replace

Posted on Jan 16, 2013

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1 Answer

What did you mean by change the squelch?


The squelch control gets rid of the hissing on a blank channel. Finda blank channel, turn up the squelch control until the hissing stops. The scanner should then scan the channels and stop on a busy one.

Jul 12, 2014 | Uniden Bearcat Scanner Bc355c 800 Mhz...

1 Answer

What causes the problem on a MOTOROLA GP-2000 portable radio having a continuous hissing sound from speaker with constant green LED on. Squelch setting is at SQL 3.


Try to recharge your batteries or replace them!!!Please tell me what you did, if there was a solution by this...then I will review your problem...thnx

Apr 14, 2014 | Radio Communications

1 Answer

No sound on unit


There are any number of reasons for no sound. I will assume you're using new batteries or fully charged batteries. The simplest reason is that a wire has become disconnected from the speaker. This would make the radio sound the same on as off. To test this see if the radio has a way of turning the squelch off, sometimes a simple push button, sometimes a menu setting, sometimes a dial to adjust the squelch setting. If there is no hissing, sometime very loud so turn your volume down first, then either the audio output amp is dead or a wire to the speaker is broken or disconnected. I today's radios the audio amp is most likely a simple small IC but, it could be inside an all-in-one chip and if it's proprietary getting the chip could be a problem. If it's a simple audio chip you'll have to find a replacement or rig up another audio amp IC to work as a replacement. Let's hope for the simple broken or disconnected wire which should be easy enough to fix.

Now, if when you remove the squelch you hear the hissing but you still cannot hear transmitting from your other radio, it could be that the one transmitting is in fact NOT transmitting an not that the other radio cannot hear. You have checked that both radios can or can not hear someone else's radio right?

Assuming you do know that one radio cannot hear what the other can and make no sound other than hissing when the squelch is off the problem is either in the RF or IF sections of the radio's receiver. In general this used to be a more complex repair so let's go another easy fix by going to the very first place the RF comes in, the antenna.

Just like the audio section when a speaker wire is disconnected sometimes the wire or trace going to the bottom of the antenna can become disconnected or broken. To check this bring a good transmitting radio very close to the one that hisses but does not hear the transmitting radio and see if any place as close as you can get the two radios causes the non-hearing radio to hear the transmitting radio. If so, then look for a problem with the antenna connection.

If none of these easy things bring the problem to heel then there's probably something amiss in the RF or IF receiver sections. If the radio has one or two chips that do all the work here then see if you can get both and replace them. I haven't even taken apart my own small FRS radios to see how complex the receivers are in these so I won't go any further than that since I simply don't know your radio.

I hope that helps.

Apr 07, 2014 | Radio Communications

1 Answer

My pioneer A-109 amplifier has stopped emitting any sound. power is still being recieved, but no sound from any inputs or sound devices, also no feed back noise. speakers and cables are as should be. any...


If there's not even a hiss from the speakers it may be that you've inadvertently hit the small button underneath the power button which turns the speakers off in favour of the headphones.

Oct 12, 2010 | Pioneer A109 2-Channel Amplifier

1 Answer

Garmin Rino 530 radio noise even with squelch turned up. Hissing


Are you carrying a cell phone with you at the time? A cell phone can interfere with these units. You may want to call Garmin to ask questions on this problem. They are very helpful and professional.

Dec 30, 2009 | Garmin Rino 530 GPS Receiver

1 Answer

HELP


If the weather band is working, the scanner should be working. To verify operation:

- Move the MODE switch to "Scanner" and power the unit ON.
- Press the SVC button (chrome button below display).
- Press POL (chrome button below display).
- Turn the SQUELCH knob towards the left until scanning stops and you hear a hissing noise.
- Turn the SQUELCH knob towards the right slowly until scanning resumes.

If the scanner stops on anything - even noise, it's working.

To Program:

- Slide the MODE key to "Scanner."
- Power the unit ON
- Turn the SQUELCH knob to the left until you hear a hissing noise, then turn it the right - slowly - until scanning resumes.
- Press HOLD.
- Press E (PGM).
- Press 0, 1.
- Press HOLD.
- Enter your first frequency, including the decimal point (EX: 156.055).
- Press the E (PGM) key.
- Press the UP arrow (above the SCAN key). Scanner will move to channel 02.
- Enter your second frequency, including the decimal point.
- Press the E (PGM) key.

You should now have two frequencies programmed. Press the SCAN key . . .

If it still will not accept programming, let me know.

BillB

Nov 07, 2009 | Uniden BC340CRS Base Scanner

1 Answer

Hissing sound coming from speakers


I found out that if I manually turn the speakers down on the tv and then turn it up with the remote control the hissing sound goes away

Mar 18, 2009 | Toshiba 65HDX82 65" Rear Projection...

3 Answers

Very bad hiss even when power is turned off and battery is removed


If you use a sennheiser check your Squelch is not set to high / low. I use a Z1 and that solved my problem.

Feb 07, 2008 | Sennheiser EW100ENG-G2 2-Way Radio

2 Answers

Constant Rx


Hi, It would initially seem that your auto squelch is malfunctioning. With the squelch apparently way down, the RX indicator would automatically appear as if you are receiving something (even if it were just noise). Assuming no other fault except the auto squelch, a possible workaround is to use any of the 38 CTCSS codes both in receive and transmit. With the CTSS activated (TX/RX), even with squelch all the way down or auto off/defective, you will not hear anything except a radio transmission with the correct CTSS code. Again, this will only work of course with just the auto squelch muting problem. Any other problem/fault and this method may not work. Hope this be of some help/idea. Post back how things turn out or should you need further information. Good luck and kind regards.

Sep 03, 2007 | Uniden GMR638-2CK (22 Channels) 2-Way...

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