Buy your Ampro 731 Schematic

Supporting the Right to Repair!
Schematics sent by Email £1.80 (~ $2.50 or €2.10)


Saturday 4/12/2021 8:39
I am out this morning (Saturday), orders placed
will not be sent until about 12:00 (UK time)
Not the correct model? go back to the search page to change

Ensure Javascript is enabled!!

£1.80 (~ $2.50 or €2.10)

Check your PayPal Email is correct!
Email me to advise different Email to send to

Ampro 731 Specification spec data sheet


The following notes are automatically scraped from Google,DuckDuckGo,
Yahoo and Yandex by an Artificial (not so) Intelligent algorithm
CountryUSA
ManufacturerAmpro Corp.; Chicago (IL)
ModelMagnetic Tape Recorder 731 - Ampro Corp.; Chicago IL
Year: 1951Sound/Video Recorder and/or Player
Valves4: 12AX7 6AU6 6AQ5 6X4
TechnologyAudio-Amplification
Wave Bands- without
DetailsTape Recorder
Power TypeAC / 105-120 Volt
Dimensions300 x 260 x 200 mm / 11.8 x 10.2 x 7.9 inch
Net Weight7 kg / 15 lb 6.7 oz (15.419 lb)
Initial Price96'000.00 francs
SourceBook: Rider Vol: 22 Page: 1


TypeConfigurationYearBaseEquivalents
12AX7Double Triode1947B9A12DT7 6057 6L13 B339 CV492 E2162 ECC83
6AU6Pentode1946B7G6AU6A 6AU6WA 6AU6WB 6AU6WC 6J4P 6P2 CV2524 EF94
6AQ5Pentode1950B7GBPM04 CV1862 EL90 N727
6X4FW RectifierB7G6063 CV493 EZ90 U78