The Amp Garage

@ Erwin I would like to add one last thing. Maybe it is other way around. There is a chance that inductor was included there to kill oscillation or to control it, not to induce it. @Marcus I completely agree with results posted before. As far as frequency response, 300mH inductor or even 1H inductor...

Erwin, yes you are right. When you look at the frequency plot o Martin Manning's filters, you can see gentle mid scoop at around 400-500Hz area. When inductor is 0.3-0.5H its resonant peak is around 2k-4kHz (depending on capacitors used) and its peak is basically swamped by the high filter action. I...

Roe, I am no expert in electromagnetics, but I am almost sure that you need DC current through filter choke (some core saturation) in order to bring it to nominal inductance. Inductance depends on permeability of the core, and for iron this can change alot with amount of magnetic flux through the co...

This is what I got in Spice. You can see there is definite dip in 400Hz with inductor, but its inductance needs to be in the range of Henries not mH. This mid scooped tone can be achieved without inductor by adding series resistance before the filter circuit (like trim pot in #004 or 1Meg resistor i...

My wild guess is that inductor was supposed to be a part of RLC resonant circuit, creating peak in series resistance (thus dip in frequency response) at maybe 400-500Hz range aka 'mid scooped tone'. Knowing values of resistors and capacitors, it is pretty straightforward to figure out required induc...

You're welcome. But the credit should go to Amplified Nation for posting many beautiful pics of his Singers and Sultans. I just did a monkey work. One thing to note is that AN version is probably not exact part for part copy of SSS#005. I believe so because on different pictures you see different tw...

Hi guys, first time posting here. I was working on SSS#005 from AN pictures also, I was perplexed by 1Meg resistor feeding filter circuit, I was also perplexed by wet/dry mixing. These are results of my work. Please note, I have never heard or saw real SSS, AN or Bludotone copy of SSS and most impor...