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Modulator NSM

Modulator NSM; National Company; (ID = 2050973) Amateur-D
Modulator NSM; National Company; (ID = 2050974) Amateur-D
Modulator NSM; National Company; (ID = 2050972) Amateur-D Modulator NSM; National Company; (ID = 2050971) Amateur-D
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Modulator NSM; National Company; (ID = 2050972) Amateur-D
National Company;: Modulator NSM [Amateur-D] ID = 2050972 1400x483
Select picture or schematic to display from thumbnails on the right and click for download.
For model Modulator NSM, National Company; Cambridge & Malden (MA):
National Catalog 1941 page 15
Country:  United States of America (USA)
Manufacturer / Brand:  National Company; Cambridge & Malden (MA)
alternative name
National Toy Co.
Year: 1938–1941 Category: Amateur Equipment (Other, but not Key)
Valves / Tubes 8: 6C6 6D6 6F6G 6L6G 6L6G 6C5 6X5 83 VR150
Wave bands - without
Power type and voltage Alternating Current supply (AC) / 105-125 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Model: Modulator NSM - National Company; Cambridge &
Material Metal case
Shape Boatanchor (heavy military or commercial set).

The National NSM modulator was specifically designed to be paired with the National NTX-30 transmitter.  Frequency response is flat from 50 to 10,000 cycles.

Price in first year of sale 130.00 USD
Mentioned in National Company 1941 Catalog page 15

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 162 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.