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
 
Step Test Point Tuning Control Meter Reading Procedure
1 TP201 T202, T203, L206 Maximum Tune T202,T203 and L206 for Maximum meter reading. Repeat this step for Maximum reading
2 TP201 L116, L117  See Procedure Tune L116 for Maximum reading then adjust L117 for a dip. 
These readings are small so watch carefully.
3 Antenna Jack C213 See Procedure Set service monitor or Hand held for Operating Frequency - 10.7MHz . Tune C213 for the proper injection frequency
4 TP202 L115, L114, L111, L112, L113 See 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.
5 TP202 L209, T205 Maximum 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
6 TP202   Maximum Repeat step 4 and 5 to ensure Maximum front end sensitivity.
7 Speaker Output  T206 See Procedure Apply 100uV signal with 1 kHz modulation at 3.0kHz deviation, Tune T206 for Maximum non distorted audio output as seen on a oscilloscope.Adjust volume to prevent audio clipping.

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