This is the manual page for Heathkit. Heathkit AO-1 Audio Oscillator schematic.zip, 44 Kbytes .. IM-4100 Frequency counter Manual.zip, 2.344 Kbytes.Lazur..' Page 40. * HEATHKIT. This section of the Manual contains two calibration procedures. . to the Schematic Diagram in the Illustration Booklet to help. Below you will found our manuals on the Heath Company IM-4100. The owners manual is used as an reference guide, instruction manual and instruction book. 3 Jan 2015 Frequency Counter IM-4100 Equipment Heathkit Brand, Heath Co.; Benton Select picture or schematic to display from thumbnails on the right and click for Find many great new & used options and get the best deals for Vintage Ham Radio Heathkit Model Im-4100 Frequency Counter at the best online prices at eBay! I have a Heathkit 4100 frequency counter when I got it, there was no manual does anybody have one I can get a copy of? Thank You. Sandman 1031 Download HEATHKIT IM-4100 FREQUENCY COUNTER SCH service manual & repair info for electronics experts. Heathkit Logo This is an "Partial manuals" normally include everything apart from construction details. IM-4100 / SM-4100 / S-1357A · Frequency Counter