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RCVF Variable Air Condenser Unit

Country:  United States of America (USA)
Manufacturer / Brand:  Grebe, A.H. & Co.; Richmond Hill (NY)
Year: 1921 Category: Radio part (not a module) 
Wave bands - without
Power type and voltage No Power needed
Loudspeaker - - No sound reproduction output.
Power out
from Model: RCVF Variable Air Condenser Unit - Grebe, A.H. & Co.; Richmond
Material Wooden case
Shape Tablemodel, Box - most often with Lid (NOT slant panel).
Notes Grebe Type RCVF Self-balanced Variable Air Condenser with a maximum capacity of .0008 microfarads. The self-balancing feature of the variable air condenser is secured by having an equal number of rotary plates mounted on opposite sides of the shaft thus permitting the rotary plates to be placed in any position without disturbing the balance. This was a boxed instrument for the experimenter similar to the AMRAD boxed sets of the same time period.
Price in first year of sale 18.00 $
Literature/Schematics (1) 1921 Mesco catalog page 89

Model page created by Alan Larsen. See "Data change" for further contributors.

All listed radios etc. from Grebe, A.H. & Co.; Richmond Hill (NY)
Here you find 186 models, 115 with images and 59 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.