Uniden BCT15X & UBC800XLT Discriminator Tap (Modification)

For all your radio modifications, manuals, tips, reviews and guides

Uniden BCT15X & UBC800XLT Discriminator Tap (Modification)

Postby SilverShadow » Fri Nov 23, 2012 3:08 pm


Uniden BCT15X & UBC800XLT Bearcat scanner Discriminator Mod

Items needed:

10uF tantalum capacitor
5k to 10k resistor
3.5mm mono jack (female)……

Keep in mind that I'm using a 3.5mm male to 3.5mm male patch cord to run to the "mic in" on my laptop running Universal Trunker. Others have used an RCA jack instead of the 3.5mm jack.

Solder the positive "+" side of the 10uf Cap directly to the spot marked "DISC"…then solder the resistor in series off the cap (the orientation of the "resistor" is not important). Run your ground wire from the ground on your "jack" to one of the mounting screws on your board… and your wire coming off the "resistor" to the mono jack.


How and where you mount is your call... and thats it!

Take off the outer case shell, and then the top inner case. Just about dead center on the board look for the solder pad labled "DISC". Run a single insulated wire to this point to a jack of your choice (I prefer RCA jacks) mounted on the rear of the radio. I also like to use a tantalum capacitor in line with the jack as well.

If you take the bottom inner cover off the radio you will see the best place to installe the jack apears to be the area of the bar code/serial number label. You could also just run an audio cable into the radio thru the threaded rear hole or even one of the holes on either side of the radio's rear.

Thanks to Jeff for this mod. Also the same for The Uniden Bearcat BCD996
User avatar
Site Admin
Posts: 2119
Joined: Wed Nov 21, 2012 8:54 pm
Location: Midlands UK

Re: Uniden BCT15X & UBC800XLT Discriminator Tap (Modificatio

Postby toccylad » Thu Feb 27, 2014 4:28 pm

Hi can some one help me . please on this matter once you done the tap mod
What and how do you , use the dongle for please
Be Very Grateful For Help more use to CTSS Just trying to get head round this
Thank You :walkietalkie:
Posts: 32
Joined: Mon Jan 06, 2014 11:05 am

Re: Uniden BCT15X & UBC800XLT Discriminator Tap (Modificatio

Postby Mark5R » Thu Feb 27, 2014 4:50 pm

If you've done a disc mod tap then you dont need a dongle you need to connect your scanner to the pc. then if you are wanting to listen to digital you need to run dsd
Whistler TRX-2 ~ Funcube Dongle Pro+
Baofeng UV-5R ~ Baofeng UV-3R+
GRE PSR-225 ~ Uniden Bearcat BCT-15X
Cobra 29LTD ~ Cobra MT115
User avatar
Posts: 260
Joined: Mon Nov 11, 2013 11:37 am
Location: Sheffield

Re: Uniden BCT15X & UBC800XLT Discriminator Tap (Modificatio

Postby simon2302 » Fri Feb 06, 2015 3:18 pm

What voltage 10uf tantalum capacitor is needed
Posts: 26
Joined: Sat Jan 24, 2015 8:14 pm
Location: Peterborough

Return to Radio & Scanner Mods, Manuals and Tips

Who is online

Users browsing this forum: No registered users and 1 guest