I have a project requiring Flat Audio (Filtered/Squelched). I know it's Pin #21. What I'm needing to verify, should I use Pin #1 for Ground, tie into Pin #26 Speaker - (Ground), or something else. Any help would be appreciated.
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XTL1500 Flat Audio Ground
- Thread starter KE5VJH
- Start date
There is only one ground and that is pin 1. This radio has a balanced speaker output and pin 26 is not a ground. If you apply a ground to pin 26, or pin 20 for that matter, it will probably wreck the audio PA.
thats not true, Pin 14 is also ground on XTL/APX, only thing is on XTL pin 14 must be tied to Pin 15 Emergency for power up to occur, but Pin 14 can be used just as Pin 1 can.
And yes to get Audio out of an XTL/APX, you are going to want to have Audio + on Pin 21 and Audio - on Pin1or14 to have a complete audio circuit.
Thanks!
Thanks, I totally forgot about Pin 14/15 jumper for the Emergency Switch. Since I'll never have the need for the Emergency switch I'll tie into that loop and keep Pin 1 reserved if needed for another ground at a later time.
Actually power-up will occur whether the 14/15 jumper is there or not. The problem is that if the jumper isn't there, the radio will start trying to send emergency banners. Very annoying.
While I had this problem a couple of times before I retired (on radios I was programming legitimately for work), I assume it would apply on a radio set up for NAS as well.
Yep, remember Beep, Beep, Beep, welll!
