APPROX. GAIN PER STAGE USING CHANALYST, AND WITH A FIXED BIAS OF - 3 VOLTS

REAR VIEW

Alignment Procedure - I.F. Alignment

It is recommended that Visual Alignment be used for the I.F.
The bandpass width of the 456 - KC I.F.'s is 20 KC, so a 40-KC swept signal with a center frequency of 456-KC is used to align the I.F.'s.
Connect the Oscilloscope to pin 2 of V1C4A (7N7) and connect the signal generator to pin 6 of V103 (7B7). Keep the output of the signal generator as low as possible.
If the output impedance of the signal generator is high, it will be necessary to detune the secondary of L104 with C120.
Align L105 with C122 and C121, for a flat top to the I-F response curve, while trying to obtain maximum output.
Move the signal generator to pin 6 of V102 (7B7) and align L04 with C120 and C119 using the same procedure as used for L105.
Move the signal generator to pin 6 of V101 (7B7) and align L103 with C118 and C117 using the same procedure as used in aligning L105 and L104.
The I.F. response curve should be similar to the curve shown below.

Oscillator Alignment
The tuning meter on the front panel of the tuner may be used as an indicator when alleging the R-1 and Oscillator section.
Connect the signal generator to the antenna terminal through a 0.01 MF capacitor.
Set the signal generator and tuner to 1300 KC. Output of the signal generator should be such that a reading of approximately 6 on the tuning meter is obtained.
Adjust C101D for maximum output.
Set the signal generator and tuner to 700 KC and adjust L106 for maximum output. This procedure should be repeated for accurate calibration,

R - F Alignment
Set the signal generator and tuner to 1300 KC and adjust C101C for maximum output.
Set the signal generator and receiver to 700 KC and adjust L101 for maximum output.
When the tuner is tuned across the signal a succession of 2 peaks should appear on the tuning meter. Both peaks should have equal amplitude, and the dip in the middle should be equal to approximately 1 division on the meter scales. The maximum reading on the tuning meter should be at least 5 when adjusting C101C and L101 for this indication.
This adjustment may have to be repeated before the R - F alignment is satisfactory
If there are strong stations at approximately 700 KC and 1300 K, these may be used instead of the signal generator.