Item specifics ; Compatible Brand: For Heathkit. Format: Manual ; Compatible Model: ET-3400A. Compatible Product: Electronic Design Experimenter ; Language:. Model: Heathkit ET-3400a · Release Date: 1976 · Original Price: $200 (kit) and $280 (assembled) · Processor: Motorola 6802 @ 1 MHz · Memory: 1KB RAM (2 x 2114 ICs) HEATHKIT. MANUAL for the. MICROPROCESSOR. TRAINER. Model ET-3400 This warranty covers only Heathkit products and is not extended to allied equipment or This file contains the complete manual for the Heathkit ET-3400A computer trainer including illustration booklet. Enjoy.JerryW2JI.for the. Heathkit. ET/ETW-3400 AND 3400A. MICROPROCESSOR TRAINERS. Model ETA-3400/EWA-3400. This Modification Kit will let you interface the ET-.