Philips PM5705 Pulse Generator

Workshop Project #33 - Philips PM5705 Pulse Generator I keep looking for "odd" or "uncommon" devices on e-bay whenever I have spare time... idle paws, you know... anyhow, this time I found myself a Philips PM5705 pulse generator. Its sole purpose is to create a rectangular output signal with a given pulse width and repeat rate. This model can go as high as 10MHz and as low as 0.1Hz for the repeat rate, and between 50ns and 500ms for the pulse duration. It also has a trigger or gate input. In trigger mode, there will be a single pulse triggered (non-repeated) at either positive or negative edge of the input signal. In normal repeat mode, the same input can be used to provide a "gate" signal, i.e. the repeating pulse will be "off" by applying a "high" input. Both trigger and gate can be emulated with the "one shot" button manually too! On the output side, it can provide TTL level outputs in both normal and inverted form. These TTL outputs can also bypass the pulse section and instead output the square wave from the repeated signal. Clock generator made easy! And finally, the third output is an analog signel version of the pulse (no square wave option here!) that can also be inverted at the push of a button. The analog output can be adjusted between 0 and 15V, with an optional "baseline shift" of up to two volts. 0:00 Intro / Overview / Opening Case 1:58 Knob- and Button Removal 3:30 Front Panel / Baseline Pot? 4:30 Back Panel Section / Transformer 6:23 PCB: Caps? / Output Heat Sink / Case Cleanup 8:25 Sticker Removal 9:57 Handle Noise 10:58 Socketed Transistors (feat. socket-beheading) 11:50 Switch and Potentiometer Cleanup 13:44 Waver Switch Cams / PCB Cleaner 15:10 Front Plate Issue / Soldering Pots 16:11 Recapping 18:08 Tarnished IC 19:18 Power Indicator Replacement 20:09 BNC coaxials / Mains Switch / Mains Section 21:45 Transformer Mounting / PCB Clips / Case Structure 23:48 Front Panel / Buttons and Knobs 24:40 Power On! / PSU Problem? 26:00 Flat Headed Screw-Up / Adjustment Review 27:15 Trigger Issue 28:24 Finishing Trouches 29:34 Overview / Summary / Credits / Outtakes Music (in order) My Train's A Comin' - Unicorn Heads Light Expanse - Unicorn Heads Pickup Truck - Silent Partner Town of 24 Bars - Unicorn Heads Stacy and George - The Mini Vandals (YouTube Audio Library) You can support me on Ko-Fi: https://ko-fi.com/atkelar and also on Patreon:   / atkelar   and now also here by using the "Super Thanks" feature! Thanks to everybody who signed up already!