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(f) The operating switch disconnects the filament battery and the "B" voltage to the volume control. This
prevents unnecessary "B" battery consumption when the receiver is not in use.
(g) A fixed regenerative detector gives added sensitivity to that circuit with a resulting gain in over-all
sensitivity. This does not require any adjustment during operation.
Information on the various points dealing with installation as listed below can be obtained by referring to the
Service Notes or Instruction Books mentioned. This information has been repeatedly published in past issues of
Service Notes, and the average service man is probably so familiar with it, that further details are unnecessary.
The Radiola 22 has two red wood screws to hold the reproducer unit during shipment. Be sure that these
are removed as otherwise acoustic howling may result.
Antenna (Indoor or outdoor).—See R-44 and 46 Service Notes.
INTERSTAGE
COUPLING UNIT
Ground.—See R-44 and 46 Service Notes.
Shields.—See R-44 and 46 Service Notes.
Batteries and Connections.—See R-21 or 22 Instruction Book.
Service data on the following subjects can be obtained from the Service Notes mentioned below:
Antenna system failures.—See R-44 and 46 Service Notes.
Radiotron sockets and prongs.—See R-44 and 46 Service Notes.
Broken condenser drive cord.—See R-44 and 46 Service Notes.
Adjusting R.F. line-up condensers.—See R-44 and 46 Service Notes.
Service data on reproducer unit.—See R-100A or R-100B Service Notes.
PART I—INSTALLATION
RADIOTRON SOCKETS FOR, 1
and 2
Figure 4—View of receiver with shields removed
PART II—SERVICE DATA
7
st
nd
R.F. AND DETECTOR.
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