M1225 Discriminator Audio

[TARRA_Mick]

Hello Group, looking for where I can tap the discriminator audio directly in a M1225. I am trying to use a pair of these radios for D-STAR and from what I have been told the audio isn't very good. Not sure if this is a receive or transmit issue. I have heard the audio on the 1 pin connector isn't really true discriminator. Still trying to find a good service manual to look. Anyone having some information that will help, I'd like to hear from you!

[escomm]

Pin 1 is one half of the speaker audio

Try Pin 11

http://batboard.batlabs.com/viewtopic.php?t=75831

[TARRA_Mick]

Pin 11 is can be programmed as "unmuted/flat audio". Not sure if that is really discriminator. They say the M1225 has bad audio so I am wondering if I can do something to improve it so I can still use the M1225s for this project.

[Bill_G]

Pin 11 is as close as you'll get in the Maxtrax/Radius product line for discriminator audio. Normally it sounds perfect. So, if yours sounds bad, something is wrong.

[TARRA_Mick]

Well, I know the GM300 has a jumper for digital. Since I don't have mine up and running yet, just going by what others have said about using this model of radio. I haven't hear it so I don't know. Just trying to have an idea of what to do for it if I need to. Also wonder if I set the radio for narrowband if that may help too?

[Bill_G]

Repeater Builder has a whole page devoted to the Maxtrac/Radius series radios. You may find it useful.

If your link radio is running wideband to drive a DStar, and your friends say it sounds lousy, then perhaps you are overdriving the input. Switching to pin 11 should help, and programming for narrowband might also help.

[escomm]

Well, I know the GM300 has a jumper for digital. Since I don't have mine up and running yet, just going by what others have said about using this model of radio. I haven't hear it so I don't know. Just trying to have an idea of what to do for it if I need to. Also wonder if I set the radio for narrowband if that may help too?

No. Stop using the speaker audio. Use the flat audio on pin 11. The speaker pins are expecting 8 ohm speakers. I'll bet your audio interface isn't 8 ohms. If it sounds bad it's very likely because you're doing it wrong

[TARRA_Mick]

I'm not using speaking audio (and didn't say anything about using it). I am using pin 11. Sorry, that was never a part of my question.