RE: Troubleshooting Cinematronics Sound Cards

True but in this case we are specifically discussing benchtop
testing of Cinematronics sound boards. Since the power amplifier
output stage is comprised of a complementary pair of transistors
across +25V to -25V with the speaker output at the emitter junction
of each, I assume one would put the speaker from this point to GND
inorder to make some sound.

At least that's what I think I did on my benchtop setup ...

  SPW

> -----Original Message-----
> From: Neil Bradley [SMTP:neil@synthcom.com]
> Sent: Tuesday, November 30, 1999 4:21 PM
> To: 'vectorlist@lists.cc.utexas.edu'
> Subject: RE: Troubleshooting Cinematronics Sound Cards
>
> > Sure connect the 8ohm speaker to J1: 2 (?) to GND.
>
> Yikes. Be forewarned - Speaker ground does not always equal chassis or
> powered ground. Most often it doesn't!
>
> -->Neil
>
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> -----
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Received on Tue Nov 30 15:52:28 1999