Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ihnp4!cuae2!killer!csccat!jack
From: jack@csccat.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: modem plays the radio?
Message-ID: <203@csccat.UUCP>
Date: Tue, 18-Aug-87 11:36:04 EDT
Article-I.D.: csccat.203
Posted: Tue Aug 18 11:36:04 1987
Date-Received: Sat, 22-Aug-87 09:15:23 EDT
References: <2187@sphinx.uchicago.edu>
Organization: Computer Support Corporation. Carrollton,Texas.
Lines: 25

In article <2187@sphinx.uchicago.edu>, mobo@sphinx.uchicago.edu (Samuel Wilson) writes:
> 
> Evercomm 1200 baud 1/2 card modem.  Works fine.  My brother, who
> also has an EEII, borrows the thing, plugs it into his machine,
> turns it on and gets . . (dramatic pause) . . Jack Buck and the
> St.Louis Cardinals loud and clear on the 1" speaker.  KMOX, the
> voice of the Radio Cardinals.
> If anyone has had any experience with this (or knows how to cure
> it) please let me know.  
> Sam Wilson           ... ihnp4!gargolye!sphinx!mobo

Figure out what the inductance of the speaker is and place a capacitor
across the speaker terminals to create crude low pass filter.
It's late and my mine is fuzzy but probably.. oh.. I am going to
get flamed for this (it been a long time since I did RF stuff) but try
a 0.01 or 0.1uF ceramic, your not worryed about sound quality here and
I think problem has to do with the driver transistors base being floated 
and a simple detector curcuit has been created and I bet you brother lives
within a close proximity to the transmitter or the transmitter is of very
high power most major league baseball flagship stations are and AM no doubt.
(if it's FM, cute!)


-- 
See above 	 (214)661-8960