Help! my 246t is having a feedback problem. it doesn't do it all the tine but it happens most times when it stops on a trans.it seems to get worse if the volume is increased any idea's thanks mike connell via firstname.lastname@example.org
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Your radio is either stuck in VOX mode, or has a bad PTT button. Sometimes when using an audio device a radio will stick in Tx if the device is plugged in while the radio is turned on. When using any remote mic, earpiece, headset, or audio device be certain the radio is turned off when plugging or unplugging the device.
If no audio device is being used, the next possibility is a sticky or bad PTT button. This can sometimes be just the external button sticking, or it can be the internal button has simply worn out from repeated use.
One final thought, if your radio has programmable VOX, check to see if your programming is correct. VOX features when turned on make the radio Tx when it hears any sound, a voice or ambient noise can cause the radio to transmit.
I don't know if you've found an answer to your query yet, but here goes: Q1.Dowload the user manual, if you don't have a copy. Q2.How do you obtain a copy? Q3.Read instructions CAREFULLY, very tricky for a novice. A1.Join yahoo group specific to the BRAND/MODEL of your unit or www.uniden.com and follow the links A2.As above A3.The manual describes in plain english the steps required under direct entry programming. These units are the best uniden has made, especially for listening to P25 comms, if you're into that kind of listening.
I hope this is helpfull, I would have given you programming instructions myself, but it's quite involved and we don't have the space here.
If you were to have it open using any barcode, you could build a circuit that uses the beep of the scanner when it reads a barcode.
If you wanted it to only work with specific barcodes it would get far more complicated, you could right a program that displays a white or black box in a corner of your computer screen and just build a simple light detection circuit and tape the CDS Cell of the circuit on your screen where that box gets displayed.
A couple of things could be involved in your problem. You need to be listening to the frequencies that are being used in your area, but most of them will not be transmitting all of the time. Something you can try is if you live maybe about 10-20 miles from an airport and your scanner picks up aircraft frequencies you can look up the airport and find the automated beacon frequency and tune that in. The automated beacon should be transmitting 24/7 the weather conditions of the airport.
Another thing to check is weather you have the correct antenna attached to your scanner and that it is connected properly, the circuits in your scanner may need that antenna to be connected for the circuit to function properly.
If you are using the scanner to listen to your local Fire Dispatch there can be days when there isn't anything happening.
Another problem could be that your local Dispatch has moved over to a new Digital System and your scanner isn't equipped to recieve that System.
You didn't specify the model number of your scanner, so here's a link to a list of available Uniden scanner manuals. If your model number is listed, just click on the "Product Details" column to download/print the manual. It will provide detailed programming instructions.
To select the VOX level: 1) Enter the Menu. Advance through the Menu until the vox icon appears on the display. The current level (OFF, 1-3) will be indicated. Level oF (OFF) disables VOX, while levels - set the sensitivity of the VOX circuit. 2) Press either the up arrow or down arrow key to the desired VOX sensitivity level. Use level 1 for increased sensitivity to voice in normally quiet environments, and use a higher level to reduce undesired activation in very noisy environments. 3) Exit the Menu.