I'm parsimonious. Frugal. Penny-pinching. Oh Hell, I'm cheap. I hate losing rockets (like I said, I'm cheap). So, I'm trying out a bodged-up tracker in hopes of getting something for a little of nothing. It might not work, but then I'm not out a lot of money. What I've ordered are a 433 MHz alarm Window/Door Sensor transmitter https://www.goldmine-elec-products.com/prodinfo.asp?number=G4568 and a 433 MHz Super-Regen 433 MHZ Receiver https://www.goldmine-elec-products.com/prodinfo.asp?number=G22483 . I've got a 400MHz Yagi I built a long time ago using brass rods and a piece of PVC. I plan on attaching the receiver directly to the antenna, and adding on a minimum-parts LM386 amp and speaker (will probably need to fiddle with shielding). The transmitter may need additional circuitry to make it give a continuous "squawk" but that can be done with a 555. The transmitter runs off of a 9 v. battery, so it won't be the smallest tracker. The receiver runs on 5 v. so another 9 v. battery and a small 3-pin regulator should do the job there. I'm thinking I'll wire the power to the receiver through a momentary contact push button switch to conserve power (I'm the worst at leaving stuff turned on...). Not sure exactly how I'll test range w/o actually launching. Maybe a kite? Or I might be able to talk someone into putting the transmitter in their office window in one of the taller buildings on campus. I'll get back as soon as I've tested and let you folks know how it turns out.