The circuit on the "audioamp" web page is a speaker monitor amp. Look here: <http://www.repeater-builder.com/tech-info/op-amp-design-reference.pdf>
Set aside an hour or so and read that, and you will have a much better mental "handle" on the whole op-amp concept. Mike WA6ILQ At 07:19 PM 04/27/08, you wrote: >Ok. Put the little op-amp together via the Repeater Builder website. >http://www.repeater-builder.com/rbtip/audioamp.html >I did the one with the 15k resistor and .0047uf cap. Couldn't tell >you what pot I used. Grabbed one and threw it on. Going to look thru >my junk later this week and get a 10 or 50k and try it. Because the >audio is still real low and REAL distorted. > >However...with what Ron said...made me think about what another friend >of mine said. Isn't the ADI looking for something like 600ohms? (like >a hand mic would be) Much different than an 8 ohm speaker. > >This same setup works with a TM-G707 without any matching...why >shouldn't it work with the ADI? >Robert > >--- In [email protected], "georgiaskywarn" <[EMAIL PROTECTED]> >wrote: > > > > Started a project at the end of LAST summer and never got finished. > > Using a ADI247 as a 220mhz link radio. Blew something up in it (in > > looking for cos), sent it off, got fixed, now just getting back to the > > project. *I Thought* I had decent tx audio out of it into the RC210 > > controller hooked to it. However now I barely get a whisper out of my > > tx audio. I can hook a mic to it...no problem with the audio, works > > fine. Almost sounds like an impedance mismatch. > > > > Ideas? > > Thanks, > > Robert > > KD4YDC > > > > > >------------------------------------ > > > >Yahoo! Groups Links > > >
