Models 1101-1102
Chassis 110 RSME

I.F. 265.5 KC

TUES COMPLEMENT
1 Type 6X7 RF Amplifier
1 Type 6C5 Oscillator CA
1 Type 6L7 Converter
1 Type 6K7 IP Amp 1111or
1 Type 6H6 Diodo Detector & AVC Rectifier
1 Type 6F6 First Audio Amplifier Type
1 Type 6C5 Driver Awpllfior
2 Type 6F6 class A - B push pull output
1 Type 5Z3 Rectifier

Sockets are marked for the proper tubes.

ALIGNMENT PROCEDURE

Correct alignment is of extreme importance in all wave receivers. The receivers are properly aligned at the factory with precision equipment and realignment should not be attempted by the service technician until all other causes of faulty operation are corrected.

In order to properly realign the receiver the following equipment is necessary:

1. A signal generator which will provide an accurately calibrated signal at any frequency from 262 kilocycles to 18 megacycles. The generator should have adjustable signal output.

2. An output audio voltmeter of the low voltage type to be connected across the moving coil of the speaker. This should be capable of providing a readable deflection for relatively low output levels to avoid the effects of overload.

3. An insulated or non-metallic screwdriver for the adjustment of trimmers.

IF ALIGNMENT 262.6 KC

1. Connect the output meter (low scale) across the loudspeaker voice coil. Turn the wave band switch (outside of tuning knob) to its left-hand or counter-clockwise position. This brings the red indicator for broadcast band to the top. Turn the volume control to its maximum position.

2. Turn the variable selectivity (center bottom knob) to the left or sharpest position. Put tone control on brilliant or clockwise position. With selectivity control held all the way to the left or counter-clockwise loosen set screws of collars which actuate variable selectivity coupling and rotate until the drive cables are drawn out as far as possible without forcing. Tighten set screws in the collars. This adjustment assures maximum selectivity and should be checked before IF alignment is done.

3. Connect the test oscillator ground to chassis and the "hot" lead from the test oscillator to the grid of the 6L7 converter tube through a series .1 mfd condenser. Set test oscillator to 262.5 kc.

4. With variable selectivity control in sharpest position adjust IF alignment screws c14, c15 of output transformer, (directly behind tuning condenser) to maximum output reducing output of test oscillator to keep the meter reading on scale as alignment proceeds.

5. Adjust alignment screws, c12, c13, of input transformer T1, (adjacent to electrolytic condenser) to maximum output as described above.

6. Readjust all four alignment screws to insure accurate alignment. Always use the lowest possible output from the test oscillator to preclude the possibility of automatic volume control action confusing proper adjustment.

RF Alignment (Broadcast "A" or "Red" Band)

1. With test oscillator connecting antenna post through .00025 Mfd. as above set signal generator to 1400 kc.

2. Set dial scale, hour and minut hands, to 6 o'clock when gang condenser is fully meshed at maximum capacitance.

3. Set dial to calibration mark 1400 kc using hour hand to indicate frequency (no further attention need be paid to position of minute hand which is used merely for convenience in logging stations by "TIME"). Adjust broadcast oscillator trimmer condenser c16, for maximum output meter reading. If it is found that two peaks occur within the range of the trimmer action use the one in which the trimmer is in its lowest capacitance or counter-clockwise position.

4. Adjust detector input trimmer c8, to a maximum.

5. Adjust the antenna stage trimmer c4, to a maximum

6. Set test oscillator to 600 kc and tune in the signal then adjust broadcast oscillator padder c20, for maximum output. This padder is mounted under the chassis at the front of receiver. Rock the condenser back and forth a degree or two in order to obtain proper maximum.

7. Repeat the 1400 kc adjustments described under 3, 4, 5 for greater accuracy. The output of the test oscillator should always be kept at the lowest output which will allow sufficient meter swing since this assures greater accuracy of adjustment.

Short Wave "B" or "Green" Band

1. Turn the wave band switch to the "B" or "Green" position. Leave the oscillator connected as above but with its output set to 4000 kc and the .00025 mfd condenser replaced by a 400 ohm resistor. Set dial scale to 4 mc on the green band, adjust "B" band oscillator trimmer condenser C17, for maximum output observing as before that the proper point occurs at the minimum or counter-clockwise position of the screw if two points are found.

2. Adjust detector input "B" band trimmer condenser c9, to a maximum while rocking the tuning condenser slightly for maximum response.

3. Adjust antenna stage "B" band trimmer C5, for maximum output.

4. Set the test oscillator to 1600 kc and tune in the signal. Adjust "B" band oscillator padder condenser C21, for maximum output while rocking tuning condenser as described above.

5. Repeat operations 1, 2, 3 to assure precise alignment.

Short Wave "C" or "Yellow" Band

1. With test oscillator connected same as for "B" band and set to 9000 kc (9 mc) set dial scale to 9 mc on yellow ban.d

2. Adjust "C" band oscillator trimming condenser C18, for maximum response. Use lower capacity or counter-clockwise response point.

3. Adjust "C" band detector input trimmer C10, to a maximum, "rocking" tuning adjustment to obtain greatest output.

4. Adjust antenna "C" band trimmer c6, for maximum response

5. Set test oscillator to 4000 kc (4 mc) and tune in the signal. Adjust "C" band padder condenser c22, for maximum output while rocking tuning condenser as described above.

6. Repeat operations 1, 2, 3, 4, to assure precise alignment.

Short Wave " D " or " Blue " Band
1. With test oscillator connected as for " B " and "C" bands and set to 16000 kc (18 mo) set dial scale to 18 mc blue band
2. Adjust " D " band oscillator trimmer c19, for maximum response, Use lower capacity or counter-clockwise response point.
3. Adjust " D " band detector Input trimmer c11, to a maximum, rocking tuning adjustment to obtain greatest output.
4. Adjust " D * band antenna trimmer c7, for maximum response
5. Repeat operations 1, 2, 3, 4, to secure precise alignment

In checking the circuit with a continuity or ohmmeter it is wise to follow the schematic diagram in orderly fashion starting at the antenna and ground connections and proceeding to the speaker circuits.

In checking circuits connected to the electrolytic condensers it is necessary to observe the polarity of the leads of the continuity meter. Use the meter with the positive test terminal on the anode or plus side of the circuit. If the reverse connection is used the electrolytics condenser will become conductive and show a false low resistance reading.

The 10 kc interchannel beat filter L7-C45 is a compete assembly in which the coil inductance is individually adjusted to tune with the condenser. In the event that either part should require replacement it will be necessary to order the complete assembly.

Excessive hum in this model has been found to be due to defective 6H6 and 6C5 tubes. Replace each tube in turn with one known to be normal.

REPLACEMENT PARTS AND PRICE LIST