Please click your language flag. Bitte Sprachflagge klicken.


686S; National Company; (ID = 373931) Power-S 686S; National Company; (ID = 373932) Power-S
686S; National Company; (ID = 373933) Power-S
Use red slider bar for more.
686S; National Company; (ID = 373931) Power-S
National Company;: 686S [Power-S] ID = 373931 675x480
Select picture or schematic to display from thumbnails on the right and click for download.
For model 686S, National Company; Cambridge & Malden (MA):
Courtesy of Fischel.
Country:  United States of America (USA)
Manufacturer / Brand:  National Company; Cambridge & Malden (MA)
alternative name
National Toy Co.
Year: 1939 Category: Power supply/conditioner or battery or charger 
Valves / Tubes 1: 6X5
Power type and voltage Storage and/or dry batteries / 6 Volt
Power out
from Model: 686S - National Company; Cambridge &
Notes Vibrator pack for 6V DC, uses mallory 626 vibrator and 6X5 rectifier, improved circuitry (capacitors); output power 165V DC (B+ voltage), 45 mA used to power HRO / HRO-5 series receivers.
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 17 = 1948 and before

All listed radios etc. from National Company; Cambridge & Malden (MA)
Here you find 430 models, 275 with images and 162 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.