Question about Uniden Bearcat Pro PC68XL CB Radio
No they are different. the pro 510 doesn't have a variable like the 29.
just trace the audio wire back to the audio transformer there should be a transistor on that section. best is to change the value of the resistors controling it to increase modulation.. if you take it out.. it will be wide open.. and can cause issues like splattering on adjacent channels. same goes for cutting the audio limiting diode, will cause the same issues. leave the parts in the circuits just change the values to achieve 100% modulation on a scope or wattmeter with a modulation function.
Posted on Oct 21, 2013
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Posted on Jan 02, 2017
deweyp, hi, if you are wanting to turn the power up some on the radio, do this; tune L4, L5, L6, L9 for
maximum RF forward output. There are 2 versions of the radio, and both are listed as 510xl. If you are wanting to expand the freq's or add channels, then no, there is no mod for that radio. If your going to tune the radio for more power, make sure you have a power meter to watch the output. It is preferable to tune into a dummy load so your not broadcasting over the air. You tune the radio for peak output, using a steady awwww sound in to the mic. Just be careful as that radio has a fairly small driver and final transistor. Don't want to let the factory smoke out of it,,,
Here is what the little variable adjustments are for and what they control;
VR2 TX Meter
VR3 RX Meter
VR4 RX IF Gain
Hope this helps you out, let us know,, Mechanic
Posted on Feb 19, 2008
If you look on the solder side of board you shoud see a straight line of 5-7 solder joints, look on the other side the audio vhjp is a bmack thin retangular ic chip. Not to worry you wont hurt anything by doing this. Its an old cb tech trick to test audio chips.GOOD LUCK.
Oh one other thing does the radio have same same problem in either vehicle? A insulating washer on the antenna bracket can cause this also,
Happy New Year , Tom
Posted on Dec 31, 2008
SOURCE: UNIDEN UH-011 UHF CB RADIO
i have just printed off a hard copy of this manual it was on Http//.www.uniden.com.au/ RESOUCES main/pdf/uh011.pdf If that isnt helpfull i could post it out to you.
Posted on Aug 09, 2009
SOURCE: I have a Uniden Pro
chk mic, lose cable in **** plug test with other mic .. also test with Ext speaker.. do u get any reading on meter / LED display during RX? does PA work? otherwise your sound chip is dead
Posted on Jan 04, 2011
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