Atwater Kent 30, Early, Late Schematic

Atwater Kent 30, Early, Late

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Product Information:
Model:30, Early, Late
Manufacturer:Atwater Kent

Schematic Pages

PNG: Page 1 Rider Manual Volume 3

Schematics Content

Page 1:

ATWATER KENT MFG. CO.

Model 30 Early Late Data

Model 30 Early

CONDENSERS

Detector phone .002 mfd #8241 500 volts
Detector grid .00025 mfd #8112 500 volts
Plate bypass .3 mfd #14902 450 volts

RESISTORS

Grid suppressors 500 ohms #8092 flat wire wound
Detector grid leak 2.0 megs #15892 1 watt green
Detector bias 450 ohms #8190 tapped 180-270 ohms
A-f filament 1.5 ohm #8256 green covered
Detector rheostat 20 ohms #8310
R-f rheostat 10 ohms #4690

TRANSFORMERS

1st a-f primary 1000 ohm #8060
1st a-f secondary 7000 ohms
2nd a-f primary 1700 ohms #7661
2nd a-f secondary 3250 ohms

Antenna choke 35 ohms #8232

Note. The early production of Model 30 can be recognized by the moulded end plate tuning condensers. The later production employed metal end plate or frame condensers. Furthermore, the early production has three separate sockets for the r-f tubes. The later production employs a single moulded base for the three r-f sockets. The same wiring diagram is used for the early and late productions of this receiver,

Model 30 Late

The parts employed in Model 30 Late, are substantially the same as used in Model 30 Early, with the exceptions as noted and also, the use of grid suppressors of 350 ohms each and part # 8439. These resistors are small flat, wire wound units.

Model 48

Model 48 is the identical of Model 30 Late, but has a gold-finished panel and a few minor refinements.

Modol 35 Early

Model 35 is like Model 30 except that the detector and a-f filaments are controlled by a single fixed resistor of 1.0 ohm, part # 8126 (brown covered). Also that grid suppressors are part # 8225. Same value as in Model 30 Early.