Power Supply 697 Late

Power Supply 697; National Company; (ID = 2049555) Power-S Power Supply 697; National Company; (ID = 2049556) Power-S
Power Supply 697; National Company; (ID = 2049557) Power-S Power Supply 697; National Company; (ID = 2049558) Power-S
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Power Supply 697; National Company; (ID = 2049555) Power-S
National Company;: Power Supply 697 [Power-S] ID = 2049555 1400x1228
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For model Power Supply 697 Late, National Company; Cambridge & Malden (MA)
Country:  United States of America (USA)
Manufacturer / Brand:  National Company; Cambridge & Malden (MA)
alternative name
National Toy Co.
Year: 1947–1949 Category: Power supply/conditioner or battery or charger 
Valves / Tubes 1: 5Y3GT/G
Wave bands - without
Power type and voltage Alternating Current supply (AC) / 115 / 230 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Model: Power Supply 697 [Late] - National Company; Cambridge &
Material Metal case
Shape Tablemodel, with any shape - general.
Dimensions (WHD) 7.5 x 6.7 x 7.1 inch / 191 x 170 x 180 mm

The National 697 (Late) Power Supply was changed to incorporate the more modern 5Y3GT tube. The redesign came after WWII and was for the HRO 7 receiver. The 697 (Late) was available in either smooth gray or black wrinkle finish to match the receiver. It was typically referred to as a "doghouse" power supply, due to its shape.

Mentioned in Allied Catalog 1949 page 11

Model page created by Wayne Childress. See "Data change" for further contributors.

All listed radios etc. from National Company; Cambridge & Malden (MA)
Here you find 430 models, 275 with images and 163 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.