National SW3 Schematic purchase

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

Saturday 9/5/2026 14:35
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 SW3 (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 SW3 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
ModelThrill Box SW-3 - National Company; Cambridge &
YearBroadcast Receiver
Valves3: 24 24 27
TechnologyTRF with regeneration; Screengrid 1926-1935
Wave BandsBroadcast and Short Wave (SW).
Power TypeAlternating Current supply (AC) / 2,5 / 135-180 Volt