National MB30 Schematic purchase

Supporting the Right to Repair!
Schematics sent by Email £1.80 (~ $2.20 or €2.10)

Thursday 5/3/2026 18:14
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 MB30 (Gernsback : Radio 1 P: 220B)

£1.80 (~ $2.20 or €2.10)

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The schematic will be taken from Gernsback-Manual-1930

National MB30 Specification spec data sheet

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Country	USA
Manufacturer	National Company; Cambridge & Malden (MA)
Alternative Name	National Toy Co.
Brand	Thrillbox
Model	MB-30 - National Company; Cambridge &
Year	Broadcast Receiver
Valves	5: 24 24 24 24 27
Technology	TRF
Tuned Circuits	8 AM circuit(s)
Wave Bands	Broadcast only (MW).
Power Type	AC

National MB30 Schematic purchase

Supporting the Right to Repair!Schematics sent by Email £1.80 (~ $2.20 or €2.10)

The schematic will be taken from Gernsback-Manual-1930

National MB30 Specification spec data sheet

Supporting the Right to Repair!
Schematics sent by Email £1.80 (~ $2.20 or €2.10)