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Grandpa's Secrets Maintained by: Member id grandpas_secrets ( Feedback Score Of 12124) Discover a Wealth of How-to Projects & Plans from a Bygone Era. Explore our Scientific & Mechanical History in Vintage Hobby, Craft, & Technical Magazine Articles. Store search Enter your search keyword in titles & description Store categories Store home Airplanes & Aviation (173) Autos/Sidewalk Cars/Mini Bikes (162) Motorcycles/Mo​tor Scooters (218) Boats/Marine items (143) Sporting Goods/Sports (168) Camping & Travel Trailers (30) Winter Sports (47) Bicycle Plans (7) Farm & Garden Plans (95) Construction Plans & Info (65) Craft Plans (93) Models (171) Woodworking Tools (23) Woodworking Plans (148) Toys & Games (106) Animals/Pets (19) Metal Working Tools & Plans (62) Electronics Tools & Plans (68) Cameras & Photography (23) Space & Astronomy (36) Musical Instruments (15) Magic Tricks (8) History (415) Science (36) Other (27) Display Hide gallery view View time left Store pages Store Policies About the seller View: All Items | Buy It Now 68 results found in Electronics Tools & Plans View as:Gallery Sort by:Best Match Shipping to CAN Tube Tester Portable How-To Build your Own Vintage PLAN... C $5.64 Shipping:+C $3.08 Time left:20d 13h 24m ASCC Harvard Mark 1 Aiken Vintage computer 1944 article C $13.24 Shipping:+C $3.08 Time left:7d 4h 40m LIE DETECTOR / POLYGRAPH Vintage 1953 How-To build PLAN... C $5.95 Shipping:+C $3.08 Time left:10d 21h 19m MARQUIS Folded Horn SPEAKER CABINETS How-To build PLANS C $6.15 Shipping:+C $3.08 Time left:26d 11h 25m Metal Detector Treasure Finder 1966 How-To Build PLANS C $5.95 Shipping:+C $3.08 Time left:19d 4h 8m Enlarge Build a TESLA COIL w/ SFX Ring-O-Fir​e rotor How-To PLAN... C $8.11 Shipping:+C $3.08 Time left:26d 11h 33m Laser Burglar Alarm 1973 How-To Build PLANS C $5.64 Shipping:+C $8.22 Time left:10d 5h 40m 30 watt AUDIO Amplifier Tube powered 1955 How-To build ... C $7.18 Shipping:+C $3.08 Time left:23d 7h 54m Radio Control Switch Transmitte​r + Receiver HowTo PLANS C $5.43 Shipping:+C $3.08 Time left:18d 6h 14m Photoelect​ric Lap Timer HO & Slot Cars How-To build PLA... C $5.64 Shipping:+C $3.08 Time left:13d 12h 0m Enlarge Isophone first Answering Machine 1946 Telephonog​raph C $5.64 Shipping:+C $3.08 Time left:25d 17h 47m 1958 UNIVAC Vintage Computer article ENIAC MIT and more C $8.21 Shipping:+C $3.08 Time left:26d 18h 58m Garden Cart Dumping Trailer How-To build PLANS Hauls 50... C $4.72 Shipping:+C $3.08 Time left:2d 15h 29m SPEAKER Cabinet HowTo PLANS Infinite Baffle+Bac​k Loaded C $5.43 Shipping:+C $3.08 Time left:20d 6h 30m How-To find Sunken Treasure and Keep It 1966 article C $5.13 Shipping:+C $3.08 Time left:23d 3h 27m Wagon Train Mailbox Rings Bell indoors @ Arrival How-To... C $5.43 Shipping:+C $3.08 Time left:23d 10h 25m Wireless Broadcaste​r 1956 How-To build PLANS battery po... C $6.15 Shipping:+C $3.08 Time left:18d 10h 23m Enlarge Tesla Coil 50,000 Volt Mad Science Fair SFX How-To buil... C $7.18 Shipping:+C $8.22 Time left:10d 16h 56m Tube Amplifier & Folded Horn Speaker How-To build PLANS C $8.21 Shipping:+C $3.08 Time left:9d 19h 27m Enlarge 1944 Hallicraft​ers Ad "Meet Your New Neighbor" Java C $6.15 Shipping:+C $3.08 Time left:7d 4h 33m Mini Amplifier Tube powered 1951 How-To build PLANS C $7.18 Shipping:+C $8.22 Time left:21d 10h 5m Amplifier Tube powered 1945 How-To build PLANS 10 watt C $7.69 Shipping:+C $3.08 Time left:17d 15h 19m Tube Audio Amplifier Battery Powered 1947 How-To build ... C $7.18 Shipping:+C $8.22 Time left:16d 6h 43m Guitar Pocket Amp Wireless Transmitte​r 1966 How-To buil... C $5.64 Shipping:+C $3.08 Time left:24d 15h 52m Resonating Diaphragm SPEAKER Cabinet HowTo PLANS 8" C $5.64 Shipping:+C $3.08 Time left:6d 4h 7m Photoelect​ric Pistol & Target HowTo PLANS Tube Powered C $5.13 Shipping:+C $3.08 Time left:20d 6h 19m Bass Reflex Speaker '57 HowTo build PLANS Surround type C $5.13 Shipping:+C $3.08 Time left:2d 14h 30m 20 watt Amplifier Tube power 1953 How-To build PLANS po... C $7.18 Shipping:+C $3.08 Time left:23d 8h 2m Tube powered METAL DETECTOR 1954 HowTo build PLANS C $5.43 Shipping:+C $3.08 Time left:11d 2h 28m Science Fair ELECTROMAG​NET Experiment​s HowTo PLANS INFO C $5.43 Shipping:+C $3.08 Time left:9d 3h 29m Page 1 of 3 Previous 1|2|3|4|5|6|7 Next Go to page