AR8000 'option' - what is it?

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TassieJay

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While developing some new mods for the AR8000, looking over the schematic there's a pin on the microprocessor that has R5 connecting to ground. R5's value isn't labelled, and has an asterisk (*) next to it. The alignment documents label this pin 62 as P01 "Option". Anyone know what it is supposed to do?
My AR8000 has no R5 fitted.
 

Fast1eddie

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I once owned a 8000, very nice radio for it's time. If I recall correctly, I remember reading there was mention of a optional descrambler. That may have been it, unfortunately it being a older radio, many ot the internet links on it are now dead. I am buying a 3000-not the A model and looking for information on that. Both are still good receivers and there is plenty of analog voice traffic to monitor here.
 

detroit780

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Speech Inversion

DSR8000 Speech inversion decoder is probably what you mean.

http://www.thiecom.de/ftp/aor/ar8000/information/ar8000-mods.pdf

http://www.javiation.co.uk/ar8000.html

I once owned a 8000, very nice radio for it's time. If I recall correctly, I remember reading there was mention of a optional descrambler. That may have been it, unfortunately it being a older radio, many ot the internet links on it are now dead. I am buying a 3000-not the A model and looking for information on that. Both are still good receivers and there is plenty of analog voice traffic to monitor here.
 

TassieJay

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Australia
Putting in the DS8000 is 'registered' by using the LOCAL key on the keypad, not by soldering/desoldering this 'option' resistor. In all the examples & photos on the 'net I've seen, this resistor is not fitted. I might put a 10k resistor in there and see what happens.
 
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