Sparks Withington 457X Schematic purchase

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

Friday 3/5/2024 21:58
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
Sparks Withington 457X (Gernsback : Radio 7 P: 1129-1130)
£1.80 (~ $2.20 or €2.10)
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The schematic will be taken from Gernsback-Manual-1936

Gernsback-Manual-1936 preview

Sparks Withington 457X Specification spec data sheet

These notes are automatically scraped from Google, Bing, Yahoo, Yandex
by an Artificially (not so) Intelligent algorithm
CountryUSA
ManufacturerSparks-Withington Co., (Sparton); Jackson, Michigan
ModelSparton 457X - Sparks-Withington Co., Sparton
Year: 1936Category: Broadcast Receiver
Valves4: 6A7 6F7 42 80
TechnologySuperhet IF 456 kHz; 1 AF stage(s)
Tuned Circuits6 AM circuit(s)
Wave BandsBroadcast (MW) and Long Wave.
Power typeAC / 95-260 Volt
SourceMyFile: SparksWithington-427X_437X_457X-1936.pdf
SourceBook: Gernsback Vol: 7 Page: 1129&1130
SourceBook: Rider Vol: 8 Page: 3