Heathkit Assembling & Using Audio Generator Manual Original 1955

Audio Generator Heathkit Manual IG-18 Sine-Square w/ Schematics (original)

Heathkit IG-28 Color Bar & Dot Generator Assembly Manual Original Vintage

Original Heathkit Assembly Manual Audio Generator IG-5282

HEATHKIT Assembly Manual w/Diagram Model SG-8 Signal Generator Original 1954

HEATHKIT CD-1 MANUAL w/ SCHEMATICS Assembling & Using Color Bar & Dot Generator

HeathKit CT-1 Capaci-Tester Original Assembling & Using Manual 1958

Heathkit Model IG-18 Sine Square Audio Generator Assembly Manual Original OEM