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Need help in trying to boost mod/wattage on pc68xl dont have cash to take to radio shop and also add talk back. someone needed my conex more than i did use my radio everyday thank-you for your knowledge in advance and god bless all

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Hi and welcome to FixYa,

Not much DIY (do-it-yourself) modifications on a Uniden Bearcat Pro PC68XL  Some that could be tried:

  • VR5 - adjust for max / best modulation;
  • L8, L9 & L10 - change coil spacing for maximum carrier output.
Good luck and thank you for asking FixYa.

Posted on Aug 01, 2009

  • addam cobb Feb 04, 2013

    hey can you tell me where L8-L10 are located and which way do you turn vr5

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1 Answer

Midland 9001Z How To Add Talk Back Mod


great radio but I own one and never again will I get one . To add talk back you must take off the top cover,solder a 33 ohm resistor across the pa and the external speaker outputs. If it doesn't work then try another resistor but this is the way to do it . If you want it on a variable then you attach two wires from each side of the resistor to a switch and you have it. I'm trying to get rid of mine but nobody wants to buy it.cheap.

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How do i peak a pc68xl


clip D-9 diode for max mod. tune slugs L-8 and L-10 for max swing
near back of radioL-8 has factory wax remove very careful tune slug out for max wattage output L8 L10 by rear of radio in heat sink look like tuning slugs 1 has factory wax on it remove to tune be very careful tuning slug is easy to break

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1 Answer

Microphone problem


Hi,

I might be wrong, but a wiring problem sounds like the culprit here.

Where the mic connects to the PCB, inside the radio, something has come adrift, the fact that your keying is getting through means something is loose, open it up and have a good look at the connections, if you find the culprit, fix it with solder, but be very sparing and careful, you don' t want solder all over the area, else you'l stuff up the mic input completely.

I hope I'm right, and I hope this helps you fix it.

Cheers,
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Aug 15, 2012 | Uniden PC68XL - CB radio - 40-channel -...

1 Answer

I have a uniden pc68xl cb radio. the radio i can get out but when someone is talking to you it will go blank untill you key up again


Hi, my name is John. Welcome to FixYa. Try turning your SQUELCH all the way to the left, check all your connections, hot (+) wire and your ground (-) wire, also your antenna. Need ant further, let me know. Thanks for choosing FixYa....John

Nov 22, 2010 | Uniden Bearcat Pro PC68XL 40-Channels Base...

1 Answer

Hello, i was given a cobra 25ltd classic to look at.. put it on freek counter keys up around 24,25 mhz with the last few numbers flutering around it will not stay still. when modgulated into it goes down...


Does it seem to be talking on the right channel??

Check to see if D10, which is supposed to be an N1004 diode, and see if it's been replaced with a jumper.

If that's the case, then the final is volted. This mod gains some wattage but can make a radio dirty. Putting an N1004 back in may fix the issue.

However...

Usually the radio will deadkey on the right freq.

The VCO could be off, and the radio may need to be aligned. Could the person you got the radio from have randomly turned VR's in the radio trying to mod it?

Without an ocilliscope you cannpt fully align the radio, but if you have a volt meter and a watt meter, you can do some of the alignment.

here is an alignment guide.

But if you can hear people on the correct channel, and they can hear you fine, it could be just a volted final.

Nov 07, 2010 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

Uniden pc68xl does not tx or rx. all lights comes on. I have no schematics to work with.


Try to change a 1k resistor R6(I believe) near back of radio. If not, try to change Final. Maybe small transistors near center back to back of radio. If you're not experienced take it to a Radio shop. Sorry i don't have much on this problem.

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I also have another cobra 29 ltd classic and it works fine but i cant talk or hear what other factory cb's can hear, it is supposed to be tuned and peaked and i have a wilson 2,000 antenna, and i cant talk...


nearly all problems are caused by poorly tuned or untuned antennas. a good antenna system with a cheap stock radio will out perform a great tuned radio with a bad antenna system any day of the week. if you dont believe me, check the firestik antenna website's tech notes. or wilson's tech notes.

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Bearcat 16 channel scanner


try a extention speaker in. is the squelsh turned up. if you cant plug one in try and unsolder the one inside and check with another one. worse case is the audio chip has gone and it is your local repair shop. unless you what to try and save some cash but remember you need a good slodering iron 17watts or less

Mar 25, 2009 | Uniden Bearcat Pro PC68XL 40-Channels Base...

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Uniden pc68xl


Since this is illegal to do I can't instruct on this matter, but you might do a search on cb sam website. good luck
Ed
NC Electronic
Mills, Wyoming

Nov 08, 2007 | Uniden PC68XL (40 Channels) 2-Way Radio

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