http://groups.yahoo.com/group/MicroTrak/ Micro-Trak APRS transmitters Thu, 09 Jul 2009 17:52:29 GMT VHSProducts http://groups.yahoo.com/group/MicroTrak/message/1296 http://groups.yahoo.com/group/MicroTrak/message/1296 I think a visibly burned unit is more likely to be caused by a failure from a bad match, or from a situation in which the unit went into continuous reset from Thu, 09 Jul 2009 17:50:27 GMT Joe http://groups.yahoo.com/group/MicroTrak/message/1295 http://groups.yahoo.com/group/MicroTrak/message/1295 Ours go on the way up between 600 and 1500 feet per minute. 7 to 18 Mph, and then when coming down many eceed Mach 1. Or get awful close to it. Joe Thu, 09 Jul 2009 17:48:44 GMT Kurt Savegnago http://groups.yahoo.com/group/MicroTrak/message/1294 http://groups.yahoo.com/group/MicroTrak/message/1294 Does one put that between the ground and the signal in parallel?  Maybe diagram it for the spatially/electronically challenged. :-) ... From: vhsproducts Thu, 09 Jul 2009 17:46:37 GMT Robert Kerr http://groups.yahoo.com/group/MicroTrak/message/1293 http://groups.yahoo.com/group/MicroTrak/message/1293 Joe, I'd love to know what your ballon design is? I've been flying balloons for nearly 30 years now, and have never flown a balloon that goes faster than 0 Thu, 09 Jul 2009 17:33:41 GMT Robert Kerr http://groups.yahoo.com/group/MicroTrak/message/1292 http://groups.yahoo.com/group/MicroTrak/message/1292 Allen, I've got one of those, (a Micro-amp), Iknow the final failed, as it has a melted spot in just above the connection for the final output. the unit was Thu, 09 Jul 2009 17:33:30 GMT Joe http://groups.yahoo.com/group/MicroTrak/message/1291 http://groups.yahoo.com/group/MicroTrak/message/1291 Really Allen? I wonder if that really is it? Yes the resistor will drain any buildup, But then our unit has flown on our balloons, soo many flights perfectly Thu, 09 Jul 2009 17:23:19 GMT vhsproducts http://groups.yahoo.com/group/MicroTrak/message/1290 http://groups.yahoo.com/group/MicroTrak/message/1290 I have had a number of people lately burning out their final amplifiers on their Micro-Traks. Most of these people seem to be using external antennas on Thu, 09 Jul 2009 17:06:38 GMT Gavin Groce http://groups.yahoo.com/group/MicroTrak/message/1289 http://groups.yahoo.com/group/MicroTrak/message/1289 could be done for just the gps but would be a nightmare to try and do both... check... http://www.sparkfun.com/commerce/product_info.php?products_id=8971 Gavin Wed, 08 Jul 2009 14:51:26 GMT vhsproducts http://groups.yahoo.com/group/MicroTrak/message/1288 http://groups.yahoo.com/group/MicroTrak/message/1288 Stephen, My Yahoo Spam filter ate your message, but I just found it and sent it through. Thanks for the good explanation of the USB/serial dilemna. Allen VHS Wed, 08 Jul 2009 14:49:18 GMT Stephen H. Smith http://groups.yahoo.com/group/MicroTrak/message/1287 http://groups.yahoo.com/group/MicroTrak/message/1287 ... You will have the exact same problem since embedding a USB interface in devices like the MicroTrak uses exactly the same chips that are used in Wed, 01 Jul 2009 22:07:59 GMT Robert Kerr http://groups.yahoo.com/group/MicroTrak/message/1286 http://groups.yahoo.com/group/MicroTrak/message/1286 Mark, I'm certain the one on ebay was listed as 144.390 ... -- Robert Kerr Michigan State University Help Desk - Service Center 120 Computer Center Wed, 01 Jul 2009 17:56:52 GMT K. Mark Caviezel http://groups.yahoo.com/group/MicroTrak/message/1285 http://groups.yahoo.com/group/MicroTrak/message/1285 Yup, sorry, should have mentioned that I needed the 144.390 MHz version. Yup, the 300 milliwatt version is only really suitable for airborne applications. - Tue, 30 Jun 2009 21:35:26 GMT VHSProducts http://groups.yahoo.com/group/MicroTrak/message/1284 http://groups.yahoo.com/group/MicroTrak/message/1284 Tom, The BFT ( Big Freaken' Transmitter) is my 35 Watt Micro-Trak transmitter: http://www.byonics.com/microtrak/mtbft.php This is for people in the boonies, Tue, 30 Jun 2009 21:22:55 GMT mistertfm http://groups.yahoo.com/group/MicroTrak/message/1283 http://groups.yahoo.com/group/MicroTrak/message/1283 Thanks for all the responses. My ultimate goal was to be able to get tracking coverage where ever I road, at least east of the Mississippi or around Tue, 30 Jun 2009 20:18:39 GMT Kurt Savegnago http://groups.yahoo.com/group/MicroTrak/message/1282 http://groups.yahoo.com/group/MicroTrak/message/1282 Yeah,     I was just testing the unit as I intend to fly it in an amateur rocket. 300mW is more than enough and when in the immediate area, is good for