[aprssig] GM-300 speaker output

[Scott Miller]

I meant a tracker or TNC.  I see now that it's got a discriminator audio 
output - I'll check that out.  I've had a couple of inquiries on these 
things lately, and I've still got a couple of old units in the shop that 
I haven't ever had time to set up.

Thanks,

Scott
N1VG

Rich Osman wrote:
> I'm not sure what you want ot hook up. If it's a speaker, just float it
> across the speaker outputs. The output is a very low impedance (~2 ohms,
> maybe 4) so if you use an 8 ohm speaker you won't get much audio. The
> internal speaker is just a jumper connection and isn't bad in normal use.
> 
> If you want to use that output to drive a tracker input, just cap couple
> it. I'd use the RX audio pin if I was you, the front panel volume
> control doesn't mess with it. I'd also program one of the general I/Os
> to be COS out and use it to gate the tracker.
> 
> note that the accessory connector pinouts vary by model.
> 
> http://www.batlabs.com/gm300.html
> 
> Scott Miller wrote:
>> What's the best way to hook up a GM-300 with floating speaker outputs?
>> With an isolation transformer, or is there a simpler way that won't
>> blow up the audio amplifier?
>>
>> Scott
>> N1VG
>>
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