Robert, Haste in creating a soultion to a problem such as this often results in frustration. Years ago, I damaged a piece of equipment in much the same way you did here, looking for a place to tack-solder a lead that would allow me to interface to COS. Had I started with a schematic, and found a few reasonable places to start looking, and finished with a proper connector to get it through the case, I would have saved myself aggravation, time and money. Sometimes starting with equipment on-hand is more expensive than buying something stout from the surplus commercial world, where everything you need is brought out to a connector. (Or, at least documented on the web.) Making assumptions about the ADI based on experience with the Kenwood is also likely to be unproductive. ADI is all about hitting a price point, which may lead to compromises Kenwood doesn't have to make. See if you can find a schematic for the ADI, or find another radio for which documentation is available. It will save you guessing what "the ADI is looking for..." 73, Paul, AE4KR
_____ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of georgiaskywarn Sent: Sunday, April 27, 2008 8:19 PM To: [email protected] Subject: [Repeater-Builder] Re: ADI 247 for a link radio Ok. Put the little op-amp together via the Repeater Builder website. http://www.repeater <http://www.repeater-builder.com/rbtip/audioamp.html> -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 Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com, "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 >
