We manufacture and sell them, and we call them tone and probes.  I could tell
you where you can purchase them, but I'd have to change the tag to [AD].

-Mike

> -----Original Message-----
> From: Nelson Hochberg [mailto:nelson@NOSUFFERING.COM]
> Sent: Wednesday, August 28, 2002 5:00 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]:F-set or Cable tracer
>
>
> Thanks Rick,
>
> I actually installed telephones about ten years back and used
> those things.
> We called them signal or line tracers though.
>
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Rick C.
> > Sent: Wednesday, August 28, 2002 11:37 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Re: [EE]:F-set or Cable tracer
> >
> >
> > The phone lineman use a tone generating device to trace a
> single line in a
> > bundle of pairs. They put a tone generator module (fox), rich in
> > square waves,
> > at one end or one place in a building, and take the detector
> > (hound) and sniff
> > all the wires at another part of a building. A strong howl coming
> > from a pair,
> > even without touching the cable, can be detected. The stronger
> > the signal on a
> > pair, the more likely you have the right one.
> >
> > I've seen these units sold in some of the more well-stocked
> > hardware stores.
> >
> > Rick
> >
> > Nelson Hochberg wrote:
> >
> > > Okay,  I'm sure this was covered in Elect 101 while I was
> > sleeping (which
> > > was most of the time since I thought the whole class was a
> > review) but what
> > > is a fox/hound?
> > >
> > > > I had a friend that worked for the local phone company.
> He lent me his
> > > > fox/hound and I reversed engineered it. Here is the
> hound........
> > > >    (Fox is
> > > > also available if you need it.)
> > > > Rick
> > > >
> > > > Chris Wheeler wrote:
> > > >
> > > > > I just bought a kit to make my own F-Set, and I am having
> > problems with
> > > > > the
> > > > > probe.
> > > > >
> > > > > Its basicly a 2N5484 FET followed by a bc549 feeding a
> > LM386 amp which
> > > > > detects the signal radiated by a tone generator based on a
> > pair of 555s.
> > > > >
> > > > > Does anyone have or know where I can look at a
> circuit diagram for a
> > > > > similar
> > > > > product?
> > > > > The kit has only a circuit diagram which does not match the
> > parts or the
> > > > > PCB. Foolishly I assembled it by following the PCB,
> which may or may
> > > > > not be
> > > > > correct.
> > > > >
> > > > > --
> > > > > CW.
> > > > >
> > > > > --
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