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echo: scanners
to: SCOTT CHRISTENSEN
from: ROY WITT
date: 1998-01-29 08:14:00
subject: PRO-2026 tape out

Hello Scott.
28 Jan 98 05:40, Scott Christensen wrote to Roy Witt:
 SC> Roy Witt writes in a message to Scott Christensen
 SC>
 SC>> Roy Witt writes in a message to Bruce Bilson
 SC>>
 RW>>> The external speaker jack. By using a circuit board already
 RW>>> in existence, you can tap off the audio and start/stop the
 RW>>> recorder at the same time with this circuit.
 SC>>
 SC>> Yikes!  That means that the volume control affects the level of
 SC>> the audio and you lose the speaker.  You also get any distortion
 SC>> and noise generated in the audio stages after the volume control.
 RW>> The question was, the "easiest" place to pick off the
 RW>> audio...When was the last time you opened a scanner and found
 RW>> places big enough for your soldering iron to work? On the above
 RW>> mentioned board, there's a pot to control volume to an external
 RW>> speaker, so I see no reason why one would lose the audio or
 RW>> speaker as you say. How much noise or distortion do you normally
 RW>> find in an FM transmission that will affect your capability to
 RW>> understand it?
 SC>
 SC> Now you're changing your story.  I originally said to take the audio
 SC> at the top of the volume control.  This is almost always an easy place
 SC> to find
 Where do you see I've changed the story? Surely you jest.  Opening a radio 
to look at the innards is one thing, poking around with a soldering iron is 
another.  Even if one could see the pot, modifying the radio in lieu of 
merely plugging in a board made for the application is ludicrous.. Not to 
mention the radio is suspect in any future resale transaction...
 SC>  - unless the radio has a digitally controlled audio level like
 SC> some TVs and commercial 2-way radios.
 SC>
 SC> You suggested the earphone jack.  This would work, but you would have
 SC> to monitor through the recorder.
Nope.  The board I mentioned as a jack for an external speaker.  Make it what 
you want...I use a 6" Motorola external. And, I have no problem with 
distortion that you alude to.  It works just fine..
... Colossol pervert! No form of sexual depravity is too low!
---------------
* Origin: KB6PI * HAM-ECHO Moderator * San Diego, CA * (1:202/909.10)

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