Hi Matti!
Yesterday I made couple of measurements based on Main board voltage table (Appendix E). Now I have checked receive state only (Mode LSB, f = 3.7 MHz, Filter WID, AGC slow, Speechproc OFF, NB OFF, MIC input, dummy load).
Here I present findings which are not according to the table.
OPAMP A11:
Pin 5: 2 to 3 V (5 V default)
Pin 6: 2 to 3V (5 V default)
AMP A12:
Pin 5: 5,7 V (6-8 V default)
Pin 6: 11,5 V (13-14 V default)
Pin 7: 5,8 V (7 V default)
IC IC4:
Pin 1: 3,4 V (5 V default)
Pin 2: 3,4 V (5 V default)
IC IC1 (Filter board):
Pin 10: 0,8 V (10 V default)
Next I check the solders in supply line of each pin above. Is there something special what I should take into account?
73, Saku OH2NOS “JA”