Results 1 to 2 of 2
  1. #1
    Good Citizen
    Join Date
    Jan 2009

    Default Beltronics and headphone output

    Okay I was worried about this happening, People blowing up the output amp for the speaker by trying to tie their headphone port to a FM modulator or some other output to their stereo...

    Well , I am here to save you. more importantly save your BEL vector series from a silent death.

    The problem is power, Namely the ground. The output (headphone) on the side of the detector is not meant to be grounded. if you are using a FM mod that has a lighter adapter or is otherwise powered by the car, you will pull a ground through the headphone connector and kill the audio amp in the vector dead. Now this is not 100% of the time as there are thousands of different FM mods. some will pull a ground and some wont.

    So you have 3 choices. a) use a power source for the FM mod that is isolated from the cars power B) power the mod with a battery or C) build a cable unit using a cheap audio transformer. this will allow you hook your Bel Safely to your stereo or RF mod..

    first you will need THIS from radio shack

    Audio Output Transformer -

    I will try and post some hand drawn schematics for everyones enjoyment

  2. #2
    Lead Foot
    Join Date
    Mar 2010

    Default Re: Beltronics and headphone output

    Thank you. I learned from experience. I figured something with the circuitry and grounding through the earphone jack had to do it. Nice explanation of this occurrence.



Similar Threads

  1. Bluetooth headphone for Beltronics STI-R Magnum?
    By ukiltmybrutha in forum Beltronics
    Replies: 4
    Last Post: 04-29-2012, 01:03 PM
  2. Best radar detector around $150 WITH a headphone jack?
    By pothiawala786 in forum Radar Detectors - General
    Replies: 4
    Last Post: 12-19-2011, 01:47 PM
  3. Combining RD + Jammer + GPS Audio to Headphone
    By licamell in forum Radar Detectors - General
    Replies: 4
    Last Post: 03-01-2010, 08:53 PM
  4. V1 question: Concealed & Headphone in tandem
    By nofuture in forum Valentine One
    Replies: 5
    Last Post: 06-17-2009, 05:45 PM
  5. Does the pro-78 have a headphone jack?
    By licamell in forum Whistler
    Replies: 2
    Last Post: 05-21-2007, 05:32 AM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts