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Old 07-15-2014, 4:44 PM
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Default AR8000 'option' - what is it?

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.
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Old 07-18-2014, 2:43 PM
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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.
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Old 07-24-2014, 12:28 PM
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Default Speech Inversion

DSR8000 Speech inversion decoder is probably what you mean.

http://www.thiecom.de/ftp/aor/ar8000...r8000-mods.pdf

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

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Originally Posted by Fast1eddie View Post
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.
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Old 07-25-2014, 4:17 AM
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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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