(27) RADIOLA 17 CONTINUITY TESTS
The following tests will show complete continuity for the Receiver Assembly (Figure 15) and
the Socket Power (Figure 16). Disconnect the antenna and ground leads, the cable connecting the S. P.
U. to the receiver assembly, and the A. C. supply cord at its outlet. Do not tamper with the main
tuning condensers.
A pair of headphones with at least 41/2 volts in series or a voltmeter with sufficient voltage to
give a full scale deflection when connected directly across the battery terminals should be used in
making this test.
RECEIVER ASSEMBLY CONTINUITY TESTS Remove All Radiotrons and
Disconnect Cable at Terminal Strip
Incorrect Effect Caused by
Lug No. 1 to one side of filament
contact of sockets Nos. 1, 2, 3
Lug No. 2 to other filament contact
of sockets Nos. 1, 2, 3 and 5
Lug No. 3 to one side of heater con
Lug No. 4 to other side of heater
Lug No. 5 to one side of filament
Lug No. 6 to other side of filament
Lug No. 7 to cathode contact of
Lug No. 8 to plate contact of socket
Open primary of first audio trans
Lug No. 9 to plate contact of sockets'
Open primary of 1st, 2nd or 3rd
R.F. transformers or primary of
Lug No. 10 to plate contact of socket
Open primary of output transformer
Across loudspeaker pin jacks
Open secondary of output trans
Antenna lead to ground lead
Grid contact of socket No. 1 to
Open volume control or poor con
tact of volume control arm
Grid contact of socket No. 2 to
Open secondary of 1st R.F. trans
former or grid resistance
Grid contact of socket No. 3 to
Open secondary of 2nd R.F. trans
former or grid resistance
Stator of condenser No« 3 (nearest
Open secondary of 3rd R.F. trans
output transformer) to ground
Grid contact of socket No. 5 to
Open secondary of 1st A.F. trans
Grid contact of socket No. 6 to
Open secondary of 2nd A.F. trans
23
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