help Locating Discriminator output

[AE4ML]

HI,
I can't seem to find a service or schematic for the TM281A. I want to find a point to pull discrimnator audio for packet experiment. I normally would go after the squelch pot. Well there isn't on on here. The only other option is the Volume pot.

Any thoughts


Mike

 

[ShawnInPaso]

It's described and shown on top of page 5 from this file:
http://www.arcomcontrollers.com/images/documents/rc210/TM-281a_mod.pdf

Oddly it's marked on the PCB as "DTMF in".

 

[AE4ML]

Thank you !!

It's described and shown on top of page 5 from this file:
http://www.arcomcontrollers.com/images/documents/rc210/TM-281a_mod.pdf

Oddly it's marked on the PCB as "DTMF in".

That is just what I needed !

Mike AE4ML

 

[K4NNW]

Many thanks for this little gem! I've been stewing over what APRS radio to get next, due to the 271 being discontinued.

 

[krokus]

Unless you are using 9600, older LMR radios are affordable options. The TK-705 series has been popular.

Sent via Tapatalk

 

[Project25_MASTR]

Argentdata makes an adapter for the 16 pin Motorola radios to the "standard" din adapter. By standard I mean usually only found on multi band radios.