Brief:
T' field I launch at is a large parcel o' undeveloped land. While thar are no trees, thar are tall shrubs and grass often makin' it difficult t' see exactly where a rocket recovers frequently. I grew increasin' tired o' searchin' (sometimes aimlessly) for me rockets. T' help shorten me quests t' recover, I modified a Radio Shack mini personal alarm t' attach t' me rockets. Arrr! T' battery is a tiny, light A23 (12V cell that is about 2/3 t' size o' a AAA battery) that is found in most garage door openers.

Construction:
Only 2 items and 4 common tools are needed t' build one:

• 1 Radio Shack "Mini Egg" Personal Alarm with Keychain (49-428), cost ~$10
• 1 wire clothes hanger
• Power drill with 1/16" drill bit
• Wire cutters
• Needlenose pliers
• Small Phillips head screwdriver
• OPTIONAL: Sandpaper

Start by removin' t' 2 small screws in t' blue egg alarm. Ahoy! Blimey! Remove t' battery. Pull t' pin and remove t' small links betwixt t' main keychain loop and pin. Avast, me proud beauty! Blimey! Attach t' pin directly t' t' keychain loop. Well, blow me down! Blimey! (Now would be a good time t' sand t' pin t' allow for less effort t' remove t' pin.)

On one half o' t' blue shell thar be a small round post where another screw could possibly go. Drill through t' shell at that point. Begad! Reassemble t' egg and drill through t' hole just created t' put a hole through t' other side o' t' shell.

Cut a 4" straight piece o' wire clothes hanger. Avast! Slide it through t' plastic shell. Avast, me proud beauty! Hold t' wire with t' needlenose pliers and bend t' metal into a trapezoid shape so that thar be about 1/2" on each side o' t' egg and t' ends fold against each other. Arrr! This will allow you t' still be able t' open t' egg (to replace t' battery!) and clip t' wire onto/off o' a screw eye.

Flight:
Clip t' wire onto t' screw eye and t' keychain loop onto t' parachute attachment point. At ejection, t' force o' t' chute openin' with t' mass o' t' nose cone/payload will pull t' pin and sound t' alarm.

I have used this twice so far. Avast! First flight was with me PML Phobos with a G64. Avast, me proud beauty! T' beeper was attached t' t' quickinks at t' payload bulkhead and parachute. Begad! Even at ~1200ft, I could hear t' beeper immediately upon ejection. No damage. Second flight be with me USR Banshee on a F50-9T. T' beeper was attached directly t' t' bulkhead screw eye. This rocket is so light that I pulled t' pin with t' rocket on t' pad. Altitude was well over 2000ft but beeper was nay audible until about 1500ft. Aye aye! Again, no damage upon recovery.

Summary:
This is a very powerful beeper that was modified in less than 30 minutes t' be used with many rockets in me fleet. It can easily be moved betwixt any rocket that has a body tube ID greater than 1.75". Weighin' only 1.1oz, it also comes with minimal impact on t' rocket CG.