Alignment Instructions for  E.F.Johnson PPL-6060 (UHF) Receive Section

By Matt Krick  K3MK

Preliminary checks and adjustments:
1. Connect signal generator to RX antenna jack on channel frequency.
2. Crystal Frequency = Operating frequency - 10.7 / 27.
3. Oscillator Measurements are made on the Red test points, connect negative lead of volt meter to ground.
4. If PPL-6060 needs complete alignment, preset L111 through L117 as far out of the cavity as they will go.
 
StepTest PointTuning ControlMeter ReadingProcedure
1TP201T202, T203, L206Maximum Tune T202,T203 and L206 for Maximum meter reading. Repeat this step for Maximum reading
2TP201L116, L117 See Procedure Tune L116 for Maximum reading then adjust L117 for a dip.
These readings are small so watch carefully.
3Antenna JackC213See Procedure Set service monitor or Hand held for Operating Frequency - 10.7 MHz. Tune C213 for the proper injection frequency.
4TP202L115, L114, L111, L112, L113See Procedure Apply an on-frequency signal to the antenna jack. Tune L115, L114, L111, L112, and L113 for maximum meter reading. Reduce signal generator output to keep TP202 below 1 volt.
5TP202L209, T205Maximum Apply an on-frequency signal to the antenna jack. Tune L209 and T205 for Maximum meter reading.Again, Reduce signal generator output to keep TP202 below 1 volt.
6TP202 Maximum Repeat step 4 and 5 to ensure Maximum front end sensitivity.
7Speaker Output T206See Procedure Apply 100uV signal with 1 kHz modulation at 3.0 kHz deviation, Tune T206 for Maximum non-distorted audio output as seen on an oscilloscope. Adjust volume to prevent audio clipping.

Tune points for PPL-6060 Receiver (top view, dual channel version)