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SCHEMATIC CHANGES AND EQUIPMENT DIFFERENCES



IDENTIFIER DESCRIPTION
  Schematle correction, V12B, 6U8A was 6U8.

C74, 43 pF, was 47 pF and R125, 33 kilohms, was 47 kilohms. These changes increase the gain and the Feedback of the crystal oseillator. If replacing these components, recommend replacing with the same values removed from your unit. Reference servce bulletin no 3 (reissue).

R214, 4700 ohms, was added and R151, 2700 ohms, was 3900 ohms. These changes help equalize crystal oscillator output on all frequency bands. If replacing these components, recommend replacing with the same value removed from your unit.

C266, 12 pF, was 27 pF. This-component found only In KWM-2. This change increases feedback of the crystal oscillator. If replacing this component, recommend replacing with the same value removed from your unit. Reference service bulletin no 3 (reissue).

C76, 5 to 25 pF, was 3 to 12 pF, 5 to 12 pF, or 2 to 3 pF In some units. This change provides additional tuning range. If replacing this component, recommend replacing with 5 to 25 pF.

C267, 5 pF, was 10 pF. This change improves crystal calibration. If replacing this component recommend replacing with 5 pF

C119, 10 pF, was 2 pF. This change increases crystal calibration output signal. lf replacing this component, recommend replacing wlth 10 pF.

C272, 7.5 pF, was 10 pF. This change maintains the same receiver/transmitter rf amplifier plate tuning for receivc or transmit operation. If replacing this component, recommend replacing with 7.5 pF.

R105, 12 kW, was 22 kW; C134, 1.5 to 7.0 pF, was 5 to 25 pF; C135, 20 pF, was 33 pF; and C133, 110 pF, was 130 pF. These changes Improve the input tuning range of the power amplifier. If replacing any of these components, recommend that same configuration be maintained. If one ot these components is replaced with the value shown on the schematic, make sure the value of the remaining three Component are those shown on schematic. Replace if necessary.

C97, 39 pF, was 27 pF and C121, 270 pF, was 220 pF. These changes improve the neutralization range. If replacing either of these compononts, recommend that same configuration be maintained. If replacing one of these components with value shown on the schematic, make sure value of the other component is same as shown on the schematic. Replace if necessary.

C270, 5 pF, is in a few units. It is selected in manufacturing test for minimum intermodulation distortion. If this component is not in the unit, It does not have to be added.

C180, 15 pF, was 10 pF. This change helps minimize intermodulation distortion. If replacing this componont, recommend replacing with the same value removed from your unit.

R161 is a test select component; 2200 ohms to 12 kW. The value is selected in manufacturing to calibrate the pa plate current meter (refer to paragraph 4.7 for procedure).

KWM-2 and KWM-2,A Transceivers. Schematic Diagram
figure 7-l (Sheet A)

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