Discriminator Mod For a Uniden BC-350a

[KC0CCB]

i want to know how can i tap into the bc350a and put in a jack for unfiltered audio and if anybody has done this one on the 350a or not post a jpeg of it

thanks much Todd

 

[coloradomom]

I have a Uniden 350a scanner.
Does any one know how to get the 800mhz /mod

 

[nova1010]

i want to know how can i tap into the bc350a and put in a jack for unfiltered audio and if anybody has done this one on the 350a or not post a jpeg of it

thanks much Todd

You may want to check here http://www.discriminator.nl/ic/index.html or here Tapping a Scanner - Step 1

 

[ka3jjz]

The place to find the 350A's tap point, along with a procedure as to how to install the tap, is in Bill Cheek's Scandata FAQ, which we have in our wiki (link below)...

SCANDATA.FAQ - The RadioReference Wiki

Be sure to read the whole article - there's multiple pages - as Bill wrote a gold mine of info here...

73 Mike

 

[robsterw]

This is how I did mine. Feel free to put it in the Wiki.

What you need:
-30 minutes. A can of Budweiser beer. Some Alan Jackson music.
-Soldering iron (I used a cheapie from RadioShack)
-Solder - High Tech Rosin Core (RadioShack #64-013)
-Desoldering braid (RadioShack #64-2090)/Solder sucker (RadioShack #64-2086) -- just in case something messes up.
-Wire - Insulated wrapping wire (RadioShack #278-501), cut to length approx 15"
-3.5mm panel jack (RadioShack #274-248)
-Tweezers + tiny flat head screw driver
-Hot Glue Gun
-Drill + proper sized drill bit
-Uniden BC350A Radio Scanner without the antenna/power cord

Pictures:
http://sinjohns.com/images/scanner/Uniden350Atap/bottom.jpg
http://sinjohns.com/images/scanner/Uniden350Atap/top.jpg
http://sinjohns.com/images/scanner/Uniden350Atap/rear.jpg

Instructions:
#1 Locate your wrapping wire and pre-tin one end. Solder it to the right side of the 3.5mm jack.
#2 Get the Uniden 350A Radio Scanner. Unscrew all 8 side screws. Pull off both top & bottom metal cases and put them aside with the screws.
#3 On the bottom of the scanner, locate the antenna connector. Drill a small hole in the chassis next to it for the 3.5mm jack.
#4 Route the other end of your cable to the first hole where it says 800MHZ UNIT, located straight down from the antenna connector. Use screwdriver to poke wire into the hole. Flip the scanner over and use tweezers pull it through completely from the other side. Making sure you go under that metal shield.
#5 Bring the wire to Pin #10 and solder it in to place.
#6 Flip scanner over again and mount 3.5mm jack to the hole in the chassis tightly.
#7 Glue everything down afterwords so nothing slides around. (Yeah, I'm paranoid about that stuff.)
#8 Re-assemble the metal cases/screws.
#9 And that's it! Go test the jack out on Unitrunker/DSD.

*REMINDER*: Audio levels are touchy with discriminators.
YOU WILL have to play around with your line-in/mic-in audio levels in Linux AND Windows.
Once you've got them figured out, you're golden.

 

[ka3jjz]

Done. Thanks for the contribution. You can see it (and edit it, if you wish) here...

Installing a Discriminator Tap on a BC350A - The RadioReference Wiki

I'm going to add a reference to the Scanfaq article so folks know precisely where to tap...

73 Mike