Re: Strange how-to question(s)
- From: Jasen Betts <jasen@xxxxxxxxxx>
- Date: 1 Oct 2008 10:06:14 GMT
On 2008-10-01, biscuitbecks@xxxxxxxxxxxx <biscuitbecks@xxxxxxxxxxxx> wrote:
Are the signals that come out of the headphone jack analog? I would
presume so; please correct me if I am wrong. If they are indeed
analog, does it follow that those signals could be routed into the
amplifier circuit of the vintage radio? If this is feasible, what
would I need to do to make sure the signals from the radio reception
are not "combined" with the new (mp3 device) signals, resulting in a
garbled mess?
Again, thank you for your patience in reading my messages, and for any
ideas you may have!
I have a vintage radio book somewhere ("Lamphouse Radio Data Book" (two
shillings and sixpence)) that explains how to connect a phonograph pickup
to the volume potentiometer of a valve radio...
basically what you do is examine the potentiometer behind the volume
knob, it'll have three terminals one is in, one is out, and one is ground,
usually the middle one is out. and one of the end ones is ground, and
the other is in.
what you do is disconnect the in wire and connect your programme source
(phonoghaph, cd player, whatever) to the in terminal.
if you want to get tricky you can use a switched socket here so
unplugging your source will recconnect connect the radio's tuner.
if care is taken this modification will be reversible, so it may not
devalue the radio...
Bye.
Jasen
.
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