Vintage Western Electric 7A Amplifier 1920s w/out Tube s. The top panel is a 1/2 thick piece of black Bakelite insulating material and contains all of the components on its top and bottom sides. Inside the bottom of the wood cabinet is a schematic of the circuit. Three Type 216A tubes do the amplification. Two of the Type 216A tubes are used in a push-pull output stage for maximum amplification. Three iron-core Western Electric transformers are needed to match the tubes to the input and output of the amplifier. This amplifier is battery-powered, and the tubes require 120 volts DC for the plate voltage, 6 volts DC for the filament voltage, and 7 1/2 volts for the grid bias voltage. The two C batteries are Eveready No. Your item will be carefully packed so it survives the journey. The item “Vintage Western Electric 7A Amplifier 1920s without Tubes” is in sale since Tuesday, June 29, 2021. This item is in the category “Collectibles\Radio, Phonograph, TV, Phone\Radios\Tube Radios\Pre-1930″. The seller is “earkind” and is located in Englewood, Colorado. This item can be shipped worldwide.
- Modified Item: No
- Country/Region of Manufacture: United States
- Brand: Western Electric
- Time Period Manufactured: Pre-1930