radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

Spero Four

Spero Four ; Pacific Radio (ID = 430369) Radio
Use red slider bar for more.
Spero Four ; Pacific Radio (ID = 430369) Radio
Select picture or schematic to display from thumbnails on the right and click for download.
 
Country:  United States of America (USA)
Manufacturer / Brand:  Pacific Radio Exchange; San Francisco, CA
Year: 1934 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: 58 57 PZ 82
Main principle TRF without regeneration
Tuned circuits 2 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Alternating Current supply (AC) / 110 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: Spero Four - Pacific Radio Exchange; San
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 6 = 1935 and before


All listed radios etc. from Pacific Radio Exchange; San Francisco, CA
Here you find 7 models, 5 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
rmXorg