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Section V
AN-08-10-112

TABLE G -- ALIGNMENT CHART part 1

Follow alignment in order from left to right. Start with 3rd I-F adjusment in first column, then 2nd I-F, etc. Connect signal generator to ground post of receiver using a short heavy lead. Allow receiver and signal generator to heat up for several minutes.

RECEIVER CONTROLS 3rd I-F2nd I-F1st I-F No.1 Band
C.W. OscOFFOFFOFFOFF
CrystalOUTOUTOUTOUT
AVC-OFF-MVCMVCMVCMVCMVC
VolumeMaximumMaximumMaximumMaximum
Band Sw. SettingNo. 2 Band 1.5-3.5 Mc No. 2 Band 1.5-3.5 Mc No. 2 Band 1.5-3.5 Mc No. 1 Band 200-500 kc.
Tuning Control Position1.5 Mc1.5 Mc1.5 Mc470 kc
Signal GeneratorAntenna Connections 3rd I.F. Tube VT-116 Control Grid Socket Terminal No. 42nd I.F. Tube VT-117 Control Grid Socket Terminal No. 41st Det. Tube VT-150 Control Grid External TerminalAntenna Post.
Dummy Ant..1 MFD.1 MFD.1 MFD100 MMF
Frequency Setting915 kc ± 1000 Cycles or less915 kc ± 1000 Cycles or less915 kc ± 1000 Cycles or less470 kc.
PROCEDURESensitivity60,000 Microvolts2,100 Microvolts35 Microvolts9 Microvolts See Note A
Trimmers Adjusted3rd I.F. Tuning Cores See Fig. 312nd I.F. Tuning Cores See Fig. 311st I.F. Tuning Cores See Fig. 31No. 1 Trimmers on Osc. Det. R.F. and Antenna Units See Fig. 31
Procedure Increase Sig. Gen. to about 1 volt. Adjust 3rd I.F. Tuning Core screws, first top screw and then bottom. Adjust top and bottom screw again and then a third time to maximum out-put Decrease Input from Sig. Gen. to 10 milliwatt out-put level. Adjust 2nd I.F. Tuning Core screws, top screw first, then bottom. Adjust top and bottom again, and then a third time to maximum out-put Decrease Input from Sig. Gen. to 10 milliwatt out-put level. Adjust 1st I.F. Tuning Core screws, top screw first, then bottom. Adjust top and bottom again, and then a third time to maximum out-put Adjust No.1 Trimmer on Osc. Unit to max. out-put. then adjust Trimmers on Det. R.F. and Antenna Units, in that order to maximum out-put, and decrease signal as required to maintain 10 milliwatts output. Repeat above
NEUTRALIZING THE CRYSTAL CIRCUIT

Neutralizing of the crystal circuit is not required in ordinary alignment procedure. It should not be attempted unless one of the neutralizing circuit elements as mentioned in Pharagraph 34e(10) have been replaced or unless the tuning band of the crystal circuit appears to be excessively wide.

C.W OSCILLATOR CHECK

The C.W Oscillator adjusment is likewise not required in ordinary alignment procedure. It may be done as explained in paragraph 34e(9).

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