National SW4 Schematic purchase

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Schematics sent by Email £1.80 (~ $2.20 or €2.10)

Saturday 9/5/2026 15:30
I am away until Thursday evening 21/12/2023 I cannot send any schematics marked TO SCAN until home, pre-scanned ones will be sent probably in the evening UK time
National SW4 (Gernsback : Radio 1 P: 220A)
£1.80 (~ $2.20 or €2.10)
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The schematic will be taken from Gernsback-Manual-1930

Gernsback-Manual-1930 preview

National SW4 Specification spec data sheet

These notes are automatically scraped from Google, Bing, Yahoo, Yandex
by an Artificially (not so) Intelligent algorithm
CountryUSA
ManufacturerNational Company; Cambridge & Malden (MA)
Alternative NameNational Toy Co.
BrandThrillbox
ModelSW-5 Thrill Box [24/27 tubes] - National Company; Cambridge &
YearBroadcast Receiver
Valves5: 24 24 27 27 27
TechnologyTRF with regeneration; Screengrid 1926-1935
Wave BandsWave Bands given in the notes.
Power TypePowered by external power supply or a main unit.
Initial Price114.00 $