Hello Don and all

I suspect that the impedance of the ear piece is low, and that the
cassette deck requires a high impedance.  You need to measure that of
the ear piece first to validate this.

David


In message <[log in to unmask]>, Donald L. Roberts
<[log in to unmask]> writes
>Although this request is not directly related to ham radio, I feel
>confident that this group is more likely able to provide the correct
>answer than any other group to which I am subscribed.
>
>I have a Nokia 3595 cell phone whose output I wish to patch into a
>cassette recorder.  The jack on the phone is a sub mini and is mono I
>believe.  That is, the headphone which plugs into it does not have that
>extra ring which stereo plugs have.  When I connect this into my
>cassette recorder, I get no audio.  I suspect that this circuit relies
>on some sort of specific impedance to activate it as there continues to
>be audio in the ear piece of the cell phone.
>
>If anyone on this list can provide the specifics of this circuit and
>how to patch the audio into another device, I would be most grateful.
>Sincere thanks in advance.
>
>Don Roberts

--
David W Wood