#101: Repairing and testing a vintage pulse/function generator (part 2)

This video completes the first video of my repairs of this 30+ years old "Global Specialities 8201" pulse generator / function generator / frequency counter and then shows the functional test and calibration.

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00:00 fixing the LM311DP
01:59 fixing the "FreqErr"
07:16 fixing the fan
09:27 frequency test
11:09 terminator problem
13:55 amplitude & offset test
15:33 rectangle & sine characteristics
18:51 duty cycle
20:06 gates,trigger & bursts
21:47 pulse width,delay,lead/trail
27:01 VCO & PWM
28:20 score card & GPIB
29:42 frequency adjustment
35:42 amplitude & offset adjustm.
39:57 final tests
42:53 conclusion

[neerajsinghkaira]

Incredible work ❤ . I think there should be a factory reset button through which we can recalibrate all of these things 😁😁😁

[antibrevity]

Ah, the infamous orange tants. They're inevitable failures, just like me ;). There's no way that I could troubleshoot such complex circuitry, so congratulations are in order.

[baalzevuv]

Few months ago I bought few LM317 or something similar and all were faulty. Happens.