Atwater Kent Service Data for Model 72
Service Manual pages 257-280

This Service Manual, published in January of 1931, covers model 72, AK's first super-heterodyne receiver.
The first several pages are an explanation of super-het technology and a discussion of operation and
service of these receivers. Recommended reading.
There are two versions of the H chassis receiver (H-1 and H-2), splitting at serial number 5,855,201.

Document title Date Page(s) Model(s) Description
Service Data Dec-1930 218 All 7x Model table for all 70-series models
Service Data Jan-1931 257 72 Index to document
Service Data Jan-1931 258 72 Super-het introduction & notes
Service Data Jan-1931 259 72 Service notes
Service Data Jan-1931 260  261 72 Double-Spot (image) tuning
Service Data Jan-1931 262 72 Equipment required & pointer adjustment
Service Data Jan-1931 268 72 Top view (H-1 chassis)
Service Data Jan-1931 269 72 Alignment instructions (H-1 chassis)
Service Data Jan-1931 264 72 Schematic (H-1 chassis)
Service Data Jan-1931 265a 72 Voltage table (H-1 chassis)
Service Data Jan-1931 266  267 72 Wiring diagram (H-1 chassis)
Service Data Jan-1931 263 72 Parts details (H-1 chassis)
Service Data Jan-1931 265b 72 Parts location (H-1 chassis)
Service Data Jan-1931 276 72 Parts & price list (H-1 chassis)
Service Data Jan-1931 277 72 Parts list & diagram (H-1 chassis)
Service Data Jan-1931 274 72 Top view (H-2 chassis)
Service Data Jan-1931 275 72 Alignment instructions (H-2 chassis)
Service Data Jan-1931 272 72 Schematic (H-2 chassis)
Service Data Jan-1931 273 72 Voltage table & bottom view (H-2 chassis)
Service Data Jan-1931 270  271 72 Wiring diagram (H-2 chassis)
Service Data Jan-1931 278 72 Parts & price list (H-2 chassis)
Service Data Jan-1931 279 72 Parts list & diagram (H-2 chassis)
Service Data Jan-1931 280 Spkr N Parts list & pictorial