+12.35V on terminal 8.
-5.67V on terminal 7
Pins 5 and 6 of IC1:
+2.88V approx on terminal 5.
+6.59V approx on terminal 6.
Terminal 1 was adjustable over the range of 2.88v to 6.57v by adjusting the coarse and fine tuning controls.
Controls exact impact as follows:-
Coarse on own = 2.88v to 6.44v
Fine on own = 2.88 to 2.98v
Fine and coarse both at max = 6.57v
There is a 5MHz clock on terminal 3, adjustable by a little by fine & coarse, when both at max it is 5.3mhz.
Emitter of Q6 has a signal and it is not affected by the turning of the controls it remains constant.
Moved to TP7 and got 12v peak to peak.
DC voltage readings, based on 11.4V at Q11’s emitter.
Q4 base: 3.08v
Q4 emitter 2.41v
Q4 collector 7.61vV
Q6 emitter
I am struggling to positively identify the E,C,B of Q4 and Q6 from one side of the board to another therefore I am not 100% sure of the above values, i have tried shining a torch from one side through the board but still not getting them to match up / idenify them, is there a trick to finding these as I will repeat again tomorrow?
When you flick the switch to INT the display starts scrolling and looks to be droping whatever frequency is shown on the display by about 3 mhz, the fierst digit on the left doesn't start scrolling but the others do, not sure of this is our fault or not?
Regards
Mark