View Single Post
  #6   Report Post  
Posted to
Doug White Doug White is offline
external usenet poster
Posts: 741
Default Schematic For Recotron Wireless Speakers?

" wrote in

On Feb 26, 9:05*am, Doug White wrote:
"Michael A. Terrell" wrote


Doug White wrote:

These things were also sold under the Advent and Radio Shack name.
They run on 900 MHz. *I have the owner's manual, but it doesn't
include any repair info. *I actually want to bypass RF and just
use them as battery powered speakers. *I'm sure I could trace it
out, bu

it would be easier if I had a schematic, and I'm curious about the
inner workings of the RF as well.

* *Do they have volume controls? *If so, you may be able to conne

* *the
audio across the pot. *That is, if it is an analog circuit. *If not

you'll have to find the datasheets for the ICs and draw your own

They do have a volume control, but how useful that is depends on
where they put it in the food chain. Certainly worth a look if I
can't scare anything up.

Recoton also has a large number of patents, and I thought I might get
lucky with one of those. *Unfortunately, a lot of them are unrelated,

none of them include any detailed schematics (sometimes they do).
*The guy behind Recoton was Larry Schotz, who was pretty creative. *I
found his original patent (4829570) for sending the audio over the
power lines (I had those speakers a long time ago as well). *No real
info on the 90

MHz FM wireless speakers. *I may just have to open one up & try to
sort it all out. *If he used a commercial FM decodeer chip, there may
be a clean spot where I can tap into the lines comming out of that.
*There i

also a left/right/mono selector switch that would be a likely spot to
inject the audio.

Doug White- Hide quoted text -

- Show quoted text -

Is there a patent number anywhere on the label???

I checked both a speaker & the user manual. No luck.

Doug White