From rec.radio.amateur.homebrew 772 Path: ucbvax!agate!howland.reston.ans.net!usc!elroy.jpl.nasa.gov!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge From: kludge@grissom.larc.nasa.gov (Scott Dorsey) Newsgroups: rec.radio.amateur.homebrew Subject: Re: My home brew.. Message-ID: <2bivng$ieo@reznor.larc.nasa.gov> Date: 7 Nov 93 14:12:00 GMT References: Distribution: usa Organization: NASA Langley Research Center and Reptile Farm Lines: 16 NNTP-Posting-Host: grissom.larc.nasa.gov In article dfeldman@teal.csn.org (Dave Feldman) writes: >Well I just sampled the last of my 3 batches of home brew and they all >came out great (an ale, a bock, and a wheat). I just want to know why >my homebrew radio projects don't improve with age... 73 - wb0gaz Oh, they do, they do. A few hundred hours of burn-in, and that PTO will be a lot more stable. On a more interesting note, I got my first international contact with the $10 Teenage Mutant Ninja Turtle HT, recrystalled for 6M and with an added amplification stage on the output for almost half a watt of power. Okay, so it was only Canada, but it's still going to be a lot of fun to fill out the EQUIPMENT: field on the QSL card. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." From rec.radio.amateur.homebrew 773 Path: ucbvax!agate!howland.reston.ans.net!usc!elroy.jpl.nasa.gov!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge From: kludge@grissom.larc.nasa.gov (Scott Dorsey) Newsgroups: rec.radio.amateur.homebrew Subject: Re: My home brew.. Message-ID: <2bljsa$hg5@reznor.larc.nasa.gov> Date: 8 Nov 93 14:08:10 GMT References: <2bivng$ieo@reznor.larc.nasa.gov> Distribution: usa Organization: NASA Langley Research Center and Reptile Farm Lines: 33 NNTP-Posting-Host: grissom.larc.nasa.gov In article andrews@fms.com (Andrew Sargent N8OFS) writes: >In article <2bivng$ieo@reznor.larc.nasa.gov> kludge@grissom.larc.nasa.gov (Scott Dorsey) writes: >> >>On a more interesting note, I got my first international contact with the >>$10 Teenage Mutant Ninja Turtle HT, recrystalled for 6M and with an added >>amplification stage on the output for almost half a watt of power. Okay, >>so it was only Canada, but it's still going to be a lot of fun to fill >>out the EQUIPMENT: field on the QSL card. > >Come on Scott, youv'e got to send me the schematics and mod's to >convert the 'Mutant' walkie to a 6M QRP HT. I've been looking for >this mod forever! On the transmit side, it's really just an VCXO without any tuned amp; you can replace the crystal without making any other circuit changes (although you might want to replace the 220K resistor with a smaller value in order to get a bit more output power). With a 5K resistor in place, you can get enough power to drive a 2N2222 stage class C without any problem. The receive side is a bit harder; it's really just a TRF set with a single tuned circuit. You can just reduce the capacitance on the tank circuit to move the frequency up a bit, and use the adjustable coil to set it exactly. The performance stinks, though. It's no worse on 6M than it is on 49 MHz, but it's almost unusable on 49 MHz. There are some mods for the Radio Shack personal communicator sets, which apparently use that Motorola quick-and-dirty transceiver chip set. Now, that looks like a nice 6M HT. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis."