Reverse Avalanche VCO - DIY Modular in A Week 1.4

Day 1: VCOs Part 4: The Reverse Avalanche VCO Difficulty: Easy Price: ~4.5$ without the Vactrol (for CV control), 7-8$ WITH the Vactrol. MiaW playlist: https://www.youtube.com/playlist?list=PLyE56WXw0_5Q5QGMEXWmskuhojKyRdA3T THIS is the module that started this whole journey, when watching a video by "Look Mum No Computer" where he made a hundred of these (!). So because it was the inspiration I had to make one of these aswell (I actually made three). It is also a very simple build, and the Voltage Control part of this module is a nice segway to day two and the next episode where I show how to build Vactrols :) Links to schematics, parts and other relevant stuff: Link to the Schematics (redrawn with a buffer/amplifier on the output to boost the signal a bit): https://www.dropbox.com/s/n649te1mlvzr5dp/1.4%20Schematic_ReverseAvalancheOscillator.pdf?dl=0 Link to Kerry Wongs homepage about the theory behind the Reverse Avalanche Oscillator: http://www.kerrywong.com/2014/03/19/bjt-in-reverse-avalanche-mode/ Link to Look Mum No Computers video about this Reverse Avalanche Oscillator: https://www.youtube.com/watch?v=zCTLeNxge54 Link to the fronpanel design svg file: https://www.dropbox.com/s/xm2sicwp04dnttz/1.4%20kassutronics%20avalanche%20vco.svg?dl=0 Link to the component spreadsheet: https://www.dropbox.com/s/fn9gbn0vo0fteab/MIAW%20Component%20list.xlsx?dl=0 Link to ALL the files for all the episodes as they become available: https://www.dropbox.com/sh/ynbxdv9nn6z0k47/AABt6dAvez4M-Mz-R9saO9Tka?dl=0 Ebay link to buy BC337s: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575103922&campid=5338181421&mpre=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_trksid%3Dm570.l1313%26_nkw%3Dbc337%26_sacat%3D0 Ebay link if you need to buy TL072's: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575103922&campid=5338181421&mpre=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_trksid%3Dm570.l1313%26_nkw%3Dtl072%26_sacat%3D0%26LH_TitleDesc%3D0%26_osacat%3D0%26_odkw%3Dbc337 Link to 100 3.5mm 1meter cables for 45$ on aliexpress. This is the most cables for least price I found: http://s.click.aliexpress.com/e/ctOgXegY Link to oscilloscope: https://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&toolid=11800&pub=5575103922&campid=5338181421&mpre=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_trksid%3Dm570.l1313%26_nkw%3DDSO138%26_sacat%3D0 PATREON LINK If you wish to support my work more than just a thumbs up :) https://www.patreon.com/SourceryOne