[sdiy] Jacob's ladder filter of death

[Richie Burnett]

Ooh, the negative-resistance of the arc is sure to impart some tasty distortion!!! ;-)

Health and safety implications probably don't bare thinking about though! 

-Richie,



Sent from my Xperia SP on O2

---- monika park wrote ----

>The world needs this for sure! " The Jacobs Ladder Filter, using tube diodes and arc distance to control cutoff frequency"
>
>-----Original Message-----
>From: Synth-diy <synth-diy-bounces at synth-diy.org> On Behalf Of Benjamin Tremblay via Synth-diy
>Sent: Friday, August 5, 2022 9:21 AM
>To: Synth-diy at synth-diy.org
>Subject: Re: [sdiy] PAiA Gnome Repair
>
>In particular I’m thinking about the Drummer Boy. Man that thing looked like it was from Rotwang’s laboratory. Just need a Jacobs Ladder somewhere in there.
>(So that’s what I want to invent: The Jacobs Ladder Filter, using tube diodes and arc distance to control cutoff frequency.)
>
>PAiA’s original ideas of a drum synth were harsh. The “Drum Tone Module” board has a much more subtle sound, suitable for children and the elderly. 
>
>
>
>> On Aug 5, 2022, at 9:08 AM, Benjamin Tremblay <btremblay at me.com> wrote:
>> 
>> Some of videos I have seen of early PAiA products show devices with a Soviet-style aesthetic: Big flat-head screws holding down chunky switches rated for 600v. Banana jacks and RCA plugs used randomly. 
>> We live in a very different age when Juanito Moore can make advanced, high quality modules in tuna cans because Ali express can sell you all the parts you need for less than a pizza and some beers. Back in 1977 I was a ten year old boy who desperately wanted to build and control his own real, life-sized oscillator and generate “a variety of pleasing musical sound effects” and one transistor set me back. At that time a PAiA kit was a bulk discount on parts. But no, I could never afford to buy anything over $50.
>> 
>> Benjamin Tremblay
>> 
>>> On Aug 5, 2022, at 8:54 AM, Gordonjcp <gordonjcp at gjcp.net> wrote:
>>> 
>>> On Thu, Aug 04, 2022 at 05:39:55PM -0400, Michael E Caloroso via Synth-diy wrote:
>>>> PAiA products are not destined for long life.  None of my PAiA 
>>>> modules exist because one by one they stopped working.  Due to 
>>>> priorities they landed dead last on the workbench to-do list.  They 
>>>> finally got discarded after floodwaters hit my rental house.
>>> 
>>> And yet none of them use any "exotic" components, and they all have full circuit diagrams.
>>> 
>>> I built quite a lot of Paia-alike stuff from photocopied diagrams in the 1980s when I was at school, because I couldn't afford to buy fancy components but could scavenge as many broken video recorders as I could haul away from the local TV shop's skip.
>>> 
>>> --
>>> Gordonjcp
>>> 
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>> 
>
>
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