Heathkit® and Dynaco user manuals (free downloads)

Here are a few Heathkit and Dynaco manuals that may be useful:

Heathkit IG-37 FM Stereo Generator (4.5 MB)

Heathkit IG-5218 Sine-Square Audio Generator (3.3 MB)

Check out our FreqShow LCD frequency display for the Heathkit IG-5218

Heathkit IG-5240 TV Crosshatch/Dot/Color Bar Generator (1.3 MB)

Schematic I captured for Heathkit IP-5220 (so it might contain errors)

Heathkit IP-2718 Tri-Power Supply (2.3 MB)

Dynaco PAT-4 Solid State Stereo Preamp (2.8 MB)

Dynaco SCA-50 Solid State Stereo Amplifier (9.2 MB)

Dynaco SCA-80Q Solid State Stereo Amplifier (8.9 MB)

(Manuals were scanned at 600 DPI to make the schematics readable, and without the step-by-step assembly instructions to save space/download time.)

Here is a link to my MITS 1440 calculator page

Here are some Character Generator ROM images read from 2513 ROM's used in a TV Typewriter II.

Here is a link to my VFD emulation project page.

Here is a link to some information about the GenRad 1657 RLC Digibridge.

Here is a link to some information about the EH Research Labs Model 4 NMOS EPROM Programmer

Here is a link to some information about the Sencore LC77 and LC102 Capacitor - Inductor Analyzers

Here is a link to some information about the CTC Datapoint 3300 Conputer Terminal