You mentioned that this link would be used by the skywarn guys. That could be a very important link some day. You may want to look for a used Motorola, GE, or midland. You can get them cheap. I bought a GP300 at the last free flea for $30, said it had bad rx but found someone had put a M120 front on it and it worked fine.
Also on the midland group there are a few guys selling 50+ watt vhf radios for around $30. Programming is usually not a problem. The midlands can be programmed before they are sent or the Moto,s can be programmed by your local shop. Our local shop will program and adjust a radio for $12.50. So for $42.50 I have a great radio. Anyway the point here is if it is going on a repeater it may save someones life, nevermind constant (hopefully) use. Build it big and strong and (again hopefully) it will give you and your users many years of service. You can go cheap but in the end no one will rely on it because you will constantly be fixing it. Just my .5 cent (inflation) Rob. KS4EC Sent by Good Messaging (www.good.com) -----Original Message----- From: georgiaskywarn [mailto:[EMAIL PROTECTED] Sent: Monday, April 28, 2008 10:12 PM Eastern Standard Time To: [email protected] Subject: [Repeater-Builder] Re: ADI 247 for a link radio Hi Paul (and everyone else that has responded), Thanks for the replies. You mentioning about "damaging equipment" was exactly why I didn't finish this project back at the end of the summer. Instead of using my magnifying light / glass...I tried changing the ctcss or the cos point (can't remember which right now...) at the shack. Not good. The radio went to my local repair guy to be fixed. Was using the schematic at home ;-) I think I am however going to try (tomorrow night) to go into the center wiper on the deviation pot...and see what results I get with that. I think Skip mentioned about opening up the mike. It is just a cheap mike I picked up at a hamfest. Really has better sound than the tinny sounding mike the radio came with. I thinking (and hope)honestly it will make a good and cheap link radio that will stand up to the talk our local Skywarn nets get into. Hope you guys up in VA are ok! Saw you on the news tonight. 73 and let everyone know how the deviation "dig" goes. Robert KD4YDC --- In [email protected], "Paul Plack" <[EMAIL PROTECTED]> wrote: > > 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" <kd4ydc@> > 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 > > > Since 1974, the award-winning Alpert JFCS has helped families of all faiths throughout most of Palm Beach County, FL, via counseling, seniors services, residences for the disabled, mentoring children, support groups and a lot more. SOLUTIONS FOR LIVING www.JFCSonline.com Please take note of our new website and E-Mail Addresses. Please update your contacts ASAP. -------------------------------------------------------------------------------- NOTICE: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. 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