CYBERNET.1 Final Transistors ---------------------------- Replace Q9 with 2SC1306 / replace Q10 with 2SC1307 fpr 10 watts OP Original transistors will give approx 5 watts OP PLL Alignment ------------------------- Test gear required ------------------- Freq counter to 60 Mhz, Digital VOM, 15Mhz CRO For 50 Mhz only....earth pin 4 of PLL 02A for 5Khz steps Connect counter at TP2 through 1000pf cap and adjust CT3 for 10.240 Mhz Connect CRO and counter at TP3 and adjust T3 for max amptitude. Counter should show Xtal freq X2 ( USB only ) Set clarifier at mid position Adjust CT1 and CT2 so that TP3 reads 21.95272 approx on counter FREQUENCIES AT IC2 Pin 4=21.95272 reference osc input Pin 2=19.40272 vco input Pin 9=2.55 approx loop error signal VCO Alignment ------------------------------- Connect VOM to TP1 and adjust VCO slug for the following..... 40 Channel 10 khz spacings CH1 2.8-3 volts CH40 3.8-4 volts 40 Channel 5 khz spacings CH1 2.0 volts CH40 2.8 volts (Voltages not critical) Receiver Alignment ----------------------------------- Peak T7 T8 T9 for max received signal Peak T1 T2 T3 for max sensitivity Transmitter Alignment ------------------------------------ Align on USB only.....Adjust T4 T5 T6 / L7 L11 L12 L13 for max. power OP. NOTE If set oscilates in TX with no audio mod applied, go back and re-adjust T4 T5 ( reasonably critical ) Check for equal OP on CH 1 and CH40 Adjust RV 2 full on ( ALS ) Adjust RV 11 Full on ( ALC ) Output should be 4-5 watts or 8-10 if finals have been changed as previously described. Check for carrier leakage on power meter when mic button pressed with no modulation. If leakage is present adjust RV4 RV5 ( carrier bal ) NOTE USB and LSB are reversed for some reason ? Swapping wires on pin 19 and 20 will cure the problem. ie...purple and brown wires from mode switch. Check adj. of T1 T2 T3 for max power OP or RX sens. Slight adj. of CT4 CT5 may be made if required to shift the IF freq. for clarity of RX audio. I have modified two radios for both freq and they work well. doug vk3kay@vk3ibm