Alignment Connect the output lead of the signal genera tor through a. 0001 mf. condenser to the antenna lead on the receiver.
(b) Open the gang condenser all the way. (c) Set the generator to 1712 kilocycles.
(d) Adjust the trimmer condensers on the gang until the 1712 kc. signal is heard. The gang should just tune through this signal,
(e) Set the generator to 1400 kc.
(f) Tune the set to the 1400 kc. signal, then alternately adjust the trimmers on the gang until no further improvement can be noticed on the output meter.

SOCKET VOLTAGES TAKEN @ 117.5 VOLT LINE (A. C.) *

VOLTAGES MEASURED BETWEEN SOCKET PIN a GNO. SIDE OF VOL. CONT, WITH 25OVOLT, 1000 OHMS. PER. VOLT METER.
READINGS MAY VARY in % Fig Socket Voltage Chart

ALIGNMENT PROCEDURE

ALIGNMENT PROCEDURE The chassis of this receiver is connected to one side of the power supply and for this reason all teat equipment should be thorougbly insulated in order that the power supply will not become short circuited while aligning the receiver.
This does not apply to the models J - 11 as the power supply is isolated from the chassis by a 25 mf. con denser.
CONNECTING OUTPUT METER Connect one terminal of the output meter to the plate and the other terminal to the screen of the 50L6GT out put tube. Be certain that the meter is protected from DC by connecting a condenser (. 1 mfd. or larger not electrolytic) in series with one of the leads, Tuning the I - F Amplifier To 455 Kllocycles
(a) Connect the output of the signal generator through a 100 mmf. condenser to the antenna connection (Blue or Red lead extending from rear of loop) op the receiver. Do not use a ground return from the signal generator unless it is found to be absolutely necessary. If it is found to be necessary, a small condenser (approximately. 001 mfd.) should be connected in series with the ground terminal of the signal generator and the receiver chassis. KEEP THE GENERATOR LEADS AS FAR AS POSSIBLE FROM THE GRID LEADS OF THE OTHER SCREEN GRID TUBES.
(b) Set the station selector so that the plates of the condenser gang are completely out of mesh and turn the volume control to the right (ON).
(c) Set the signal generator to 455 kilocycles.
(d) Adjust the 2nd I - F trimmer condenser, Item 7, located in top of 2nd I - F assy, (Fig. 2) for maximum reading on the output meter.
(e) Adjust the 1st 1 - F trimmer condensers, item 6, located on top of 1st IF assy., (Fig. 2) for maximum output
(f) Repeat operations (d) and (e) for more ac curate adjustments.
ALWAYS USE THE LOWEST SIGNAL GENERA TOR OUTPUT THAT WILL GIVE A REASONABLE READING ON THE OUTPUT METER.

Aligning the RF Amplifier,
(a) Set the signal generator to 1650 kilocycles.
15) With the condenser gang turned to the min. imum capacity position, adjust the trimmer condenser (Fig. 3) B, C. " OSC " so that the 1650 kilocycle signal is heard. It is not necessary that the receiver tunes through this signal.
(e) Set the signal generator to 1400 kilocyclem.
(d) Tune in the 1400 kilocycle signal in the region of 140 on the dial for maximum output.
(e) Adjust the trimmer condensers B.C. " ANT " for maximum output. (Fig. 3).
NOTE: Do not readjust the " OSC " trimmer,
(1) Repeat operations (d) and (e) for more ac curate adjustments.
WAVE TRAP Seine chassis of this model are equipped with a wave Erap for the purpose of eliminating interference from code stations which operate on a frequency of approximately 455 kilocycles. This assembly is located on the loop mounting bracket (Fig. 2) and consists of a coil, and a trimmer condenser as illustrated by the dotted lines in the Wiring Diagram (item 45).
The wave trap should not be adjusted until all other adjustments have been made. To make the adjustment, feed a 455 kilocycle signal from the signal generator through a 50 mmf. condenser into the antenna terminal of the receiver. With the gang condenser set at approximately 60 on the dial and the volume control full on, adjust the trimmer condenser on the wave trap for MINIMUM output.
Should the interfering station be operating on a frequency of slightly more or less than 455 kilocycles, the exact frequency should be determined with the aid of the signal generator. Then, instead of feeding a 455 kilocycle signal into the receiver the exact frequency of the interfering signal should be used. If it is not possible to determine the exact frequency of the interfering signal the antenna may be attached to the receiver and the receiver tuned to the position where the interfering signal is most noticeable. Then adjust the wave trup for minimum interference.

Fig. 2 - Top View Chassis Model 10

Fig. 3 Bottom View Chassis Model 10