I need to get my Uniden mdh125 radio antenna fixed.

The top escutcheon unscrews, and there are two or three screws retaining the power antenna assembly to the fender. Unscrew the escutcheon and remove the screws, then the antenna drops down. (Note that the antenna must be retracted to remove, otherwise you will have to cut the aerial off to get it out.)
If you have a fixed antenna, it simply unscrews at the base.

Fender -Front Removal

1. Remove the radiator grille opening panel reinforcement (8A284).

1. If equipped, remove the front wheel opening moulding.
   1. Remove the pin-type retainer.
   1. Remove the screws.
   1. Remove the wheel opening moulding.

1. Remove the front fender splash shield (16103).
   1. Remove the screws.
   1. Remove the pin-type retainers.
   1. Remove the front fender splash shield.

1. Remove the cowl grille.

1. On RH front fender, remove the antenna mast.

1. On RH front fender, remove the antenna base.
   1. Remove the radio antenna base cap (18A927) by gently inserting a thin straight-edged screwdriver underneath the cap and carefully following inside the perimeter until both snaps are free.
   1. Remove the screws.
   1. Lift the antenna base.
   1. Disconnect the radio antenna lead-in cable (18812) and remove the antenna base.

1. Remove the fender stuffer.

1. Remove the stone guard.
   1. Remove the pin-type retainers.
   1. Remove the stone guard.

1. Remove the front fender.
   • Remove the bolts.

Important! Please give copies to all your VW Technicians C 91--99--07 E 1999 Volkswagen of America, Inc. 1 Subject: Model(s): Group: Number: Date: AM Radio, Poor Reception 1999, 2000 91 99--07 New Golf, New Jetta, Aug. 2, 1999 New Beetle, Passat Condition AM reception is poor. May be caused by: ? An incorrect antenna mast installed for the antenna base equipped with the vehicle ? Poor ground at the antenna base or radio ? Poor battery ground to chassis or engine ? Poor antenna cable connection at Radio ? Corrosion at the antenna coaxial connectors at radio or antenna Service Vehicles are equipped with either a Bosch or a Clarion antenna base mounted on the roof and (for shipping purposes) the appropriate matching mast is located in the luggage compartment. If radio antenna masts are removed from vehicles and stored until vehicles are sold, there is a chance that an incorrect mast can be installed at the time of delivery. Note: Mismatched antenna mast and base will cause poor AM radio reception. The antenna base and mast can be identified visually as follows: (Cont. on Page 2)91-A260 requires gloss finish antenna mast 57mm 49mm Bosch 91-A261 requires matte finish antenna mast 61mm 41mm Clarion 91-A262 Technical Bulletin Important! Please give copies to all your VW Technicians C 91--99--07 E 1999 Volkswagen of America, Inc. 2 Bosch antenna ? Base (although oval) is more circular in shape (approx. 57mm x 49mm). ? Made in Germany stamped on underside of base. ? Two screws on underside of base are unpainted. ? Requires gloss finish antenna mast. Clarion antenna ? Base is more oval in shape than Bosch (approx. 61mm x 41mm). ? Two screws on underside of base are painted. ? Requires matte finish antenna mast. If antenna mast matches the antenna base correctly: -- Check antenna coaxial cable connections --arrows-- for corrosion and clean if necessary (DO NOT apply stabilant). Passat coaxial cable connection for radio is under the carpet on right side of tunnel near shifter. -- Ensure that coaxial cable is firmly seated in radio (Passat cable connection, see previous step). -- Check ground at the antenna below roof Nut --4-- (torque = 7+1 Nm) must firmly secure antenna to roof). (Cont. on Page 3)Technical Bulletin Important! Please give copies to all your VW Technicians C 91--99--07 E 1999 Volkswagen of America, Inc. 3 -- Check ground for radio behind radio on cross member (On Passat models as of Nov. 1998 beginning VIN: XE285000 ground for radio is on right side of center tunnel). -- Check engine compartment ground, left side, below battery tray; frombattery GND to body. -- Check engine/transmission ground on transmission, near engine block. -- If all grounds and antenna mast are OK. -- Replace antenna and coaxial cable assembly

For this radio you adjust power through coils in the back of the radio. Using a watt meter and a plastic screw driver push coils L201 and L202 together and the power output will decrease. If D203 (modulation limiter) has been removed you can replace that as well. This should get you fixed up. Good luck.

Your scanner has four connections on the back. Looking at the rear, from left to right, are the power jack (10 volts AC, you need an adapter for this), an external speaker jack, the AM antenna connection, and the scanner antenna jack.

The AM antenna jack is for the reception of AM radio station signals. The scanner antenna jack is for police/fire etc, as well as FM signals.

In case you don't have a manual for your radio, it is available for free here:

http://www.uniden.com/pdf/BC248CLTom.pdf

What kind of antenna is it? Have you checked your standing wave? To do this process you will need a field strenth or a SWR meter to do it,would be cheaper to have it checked at Radio Shack or you can buy one,and do it yourself. Some radio antenna light come on when transmitting,....hope this helps....

Radio shack has replacment attennas. There is a scew in the back of the radio below the attenna. Loosen it. the lower part of this and the attenna will come out. at the top of the base part is a screw where the attenna bends back and forth. remove this screw and take off the top of the attenna (the telescoping part of the attena) get a replacment attenna thiis length (of top part). The bottom of new attena will have a screw toward the base where it bends back and forth. Take this screw out and replace the new attenna base with the old attenna base (the new attenna base won't fit in the radio correctly) Now insert the fixed attenna back in t he super radio and tighten the screw on back of radio. Hope this helps.

It sounds like you are right. While you may not be mechanically inclined, you can easily open the scanner to see what is wrong. Unplug it from the wall and turn it over, so that the bottom is facing up. Remove all of the screws you can see. A regular sized phillips screwdriver should do fine for this. If you have removed all the screws you can see, there may be some below the rubber feet on the bottom of the scanner. You can peel these off with a flat screwdriver. Once you have the screws out, gently remove the bottom panel. From here you likely will be able to see the antenna connector. Is the connector just separated from the board, or is the board cracked? If it is just separated, it can probably be soldered back into place. If the board is cracked, it may not be worth repairing.

Now for the fun part...if it looks like the connector just separated from the board, it needs to be soldered back onto the board. If you feel like you want to do it yourself, there are a ton of tutorials and videos on the internet on how to solder electronics. The iron you need will be in the 25 watt range, and can be found at Radio Shack, Fry's Electronics, or probably even a hardware store.

If you're not feeling super adventurous, there are probably many resources that can help you with this. Any TV or radio repair shop (the old style Mom and Pop ones--not Best Buy or the major chains) should be able to do it. If you cannot find one in your area, you may be able to find an amateur radio group in your area who may be able to point you in the right direction. Heck, they may even be able to fix it for you.

Good luck, and I hope this information helps get your scanner up and running in no time!

if the telescopic antenna is broken you cant solder it, but you can buy a replacement antenna,some scanners have an antenna that just screws into the circuit board through a hole in the top of the case,or you can get a telescope antenna that will attach to antenna jacks on the back of the set if it has those, which im sure that model does. Antenna jacks came come in several types , one is called a BNC which just pushes in and turn about half a turn to lock in place,also some scanners have the type of jack like the back of a car radio, with those you just push them in and you can find telescopic antennas with the auto type plug at a 90 degree angle that will work fine.If you need more help let me know