[VoIP] Induction coil?

[Steph Kerman]

I'd suggesting trying a ringer coil extricated from a C4A style ringer.  
The plastic frame ITT "ball bearing clapper" ringer might be an 
especially good source since they have a compact "U" shaped core which 
is perfect for reuse as a pickup coil. 

Further one should feel no absolutely no remorse whatever about 
"wasting" one of these by salvaging the coil and core.  They're pretty 
useless as ringers.

Steph

Jayson Smith wrote:
> Hi,
> A few years ago, there was a project within a segment of the blindness
> community to make high-quality recordings of talking clocks and watches. A
> few of the guys who obviously knew what they were doing were making
> wonderful recordings of older clocks, in fact, so wonderful that you didn't
> get any of the acoustic characteristics of the cases the clocks were in,
> etc. There was one recording of a talking watch which was so good, you
> couldn't even tell it was a watch. Obviously, any talking watch is going to
> have a tiny speaker, but this recording didn't sound tiny! Turns out, they
> were using induction or pickup coils. I've decided I'd like to try my hand
> at recording some devices like that, and would just like to know what I
> need. Unfortunately, both the terms "induction coil" and "pickup coil" also
> seem to mean something in the automotive industry, thus greatly confusing my
> search. Does any old suction cup telephone recording gadget qualify as one
> of these coils, or do you need something special? Iirc, Evan Doorbell used
> such a device for most of his recordings, especially from pay phones, and
> his recordings are of wonderful quality. Any help would be appreciated.
> Thanks.
> Jayson
>
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