[Milsurplus] Dynamic Mics and powered speakers

[WA5CAB at cs.com]

Someone just sent me a link to the AM-6747 schematic.  The resistor is R2, an 
820 ohm resistor dropping the relay coil voltage to something.  The schematic 
doesn't say what "something" is like the manual I was looking at did but that 
figure could be calculated given a coil to measure the resistance of.

In a message dated 11/14/2007 3:41:36 PM Central Standard Time, 
wh7hg.hi at gmail.com writes: 
> I've been looking at the AM-4979 and -6747 for use in the Jeep.  It
> appears that the 28 volt input is dropped to 12 volts to power the
> amplifier which implies that I could just as easily operate it from a
> 12 volt source.  Is this accurate or am I missing something important?
> 

Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at comcast.net> (Backup email)
   
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