I must have to respectfully disagree with Kirk as well. Many times, from a real repeater site, communications can be done with very little power. A local coverage node (inside ones house) can be done on low power as well. The UV-5R will handle multiple 3 minute key-downs on low power without turning into a plastic blob (remote base operation). CTCSS hides most receiver inadequacies. Not everyone has ready access to programming hardware and software need for a Maxtrac or Radius, so these cheap Chinese radios can be moved in frequency without effort. Sure, they're not a Motorola, but many times users of AllStar don't necessarily need a Motorola quality radio. That said, one of my most favorite radios for dedicated linking is a MaraTrac. The VHF 100 Watt model usually is very cheap and it's easy to convert them to a lower powered unit by snipping out several components and using solder wick to 'bypass' the 2 final transistors. You end up with a 15 Watt unit that will last almost forever. Bottom line - it's all in what you want and need. Kevin - WJ8G
No need to re-thing this Kirk. It would work fine for a simple node. Now if you wanted to monitor the Win System with 100% duty cycle, you may have a point. But that is not the intent of my posting. 73 Jim W7RY *From:* Kirk Just Kirk <mailto:wb6egr@gmail.com> *Sent:* Monday, February 11, 2013 9:35 PM *To:* Jim W7RY <mailto:w7ry@centurytel.net> *Subject:* Re: [App_rpt-users] Chinese Radios For Nodes i dont mean to be disrespectful...but WHY would you use a POOR PERFORMING UV-5R when for less than $50 you could use a Maxtrac or Radius mobile????? RCVR performance is dismal at best with poor image rejection,lousy dynamic range and the selectivity of a barn door? The first time it stays keyed for 10 minutes you will be the proud owner of a colorful chinese blob of smoldering plastic.... Seriously...rethink this??? Kirk (WB6EGR)
On Mon, Feb 11, 2013 at 7:29 PM, Jim W7RY <w7ry@centurytel.net <mailto:w7ry@centurytel.net>> wrote:
I found this schematic on line for a UV5R. http://files.radioscanner.ru/files/download/file14137/shema-baofeng-5r.pdf There is COR voltage along with some transistors that control the TDA-2822 audio chip. There is also a discrete volume control too. So you can get fixed de-emphasised RX audio to drive a URI. So it looks like the UV5r would be a good candidate for a node radio and long as you use the internal PL decoder which would be fine. 73 Jim W7RY