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Messages - stecykmi

#1
Open Discussion / Re: NOD - New Oscilloscope Day
November 10, 2018, 03:51:31 PM
nice scope, i'm pretty sure i used that model or similar in university. fft mode can be really interesting! try looking at a signal before and after a distortion to see all the additional harmonics that are added.
#2
that's a pretty crazy machine. how do you actually write programs for it? manual input with individual bit entry register by register? i guess there is some machine language code that you have to follow?
#3
Build Reports / Re: 1776 Effects Multiplex with Mod board
September 10, 2018, 11:19:21 PM
ya well done on that vader, multiplex is one of my favorite circuits too. great build.
#4
Build Reports / Re: Busy Summer Build Bonanza
September 10, 2018, 11:17:19 PM
your builds are always cool chris, always good stuff
#5
Open Discussion / Re: Boost pedal with 11 vactrols
June 10, 2018, 04:08:01 PM
Quote from: culturejam on June 07, 2018, 02:50:59 PM
Quote from: zombie_rock123 on June 07, 2018, 11:55:38 AM
It maybe related to the presets/dipswitches the chase bliss stuff has.

It's this, I do believe. I think he uses vactrols in conjunction with switching (somehow). Dude is on a mission to get selenium into landfills in 50 years, haha.  ;D

my guess is that he uses the DIP switches to set different bias points and uses that to control the resistance of the vactrol. basically using the vactrols as voltage-controlled resistors. pretty clever! i think this was used in early synths as a way to implement preset voices without digital controls.
#6
sweet, being able to see FFT's might be very cool, i highly recommend playing around with that. if you compare the input of a circuit against the output, you can see what kind of harmonics are generated.
#7
simple signal generators will work for almost all audio applications, especially hobbyist stuff. they are useful for calibrating but don't forget you still have to try it with a real instrument after  :P

cool scope! does it do XY mode? does it do fft mode/spectrum mode?
#8
buy a new 2.1mm connector, cut the 2.5mm connector off and install the smaller one. just make sure you double check the polarity.
#9
the "Millionaire" mechanical calculator video in the same series is pretty cool too.
#10
Open Discussion / Re: Advice on JCM800 clone
November 05, 2017, 02:04:58 AM
seems kind of weird that the tube heater wiring isn't twisted.

Correction: it's kind of out of view against the rear panel. up for debate.
#11
i would go with a IC based amp like the one posted above for build simplicity. the TDA729 chip is also popular for diy. i think there are a few different chips in the TDA series, that one seems to be the most popular.

i have never built one myself but you can buy kits for these types of project from china quite cheaply on ebay or what have you.
#12
good find
#13
Open Discussion / Re: Any auto wah use an ADSR?
May 27, 2017, 12:14:29 AM
good question, there are none that i know of but keep in mind that a plucked string's envelope will look a lot like a typical ADSR envelope. a simpler attack/decay control setup (which are more common) may be all you need for most guitar applications since you can sorta fake the extra controls with picking and a threshold/intensity control. the primary reason a synth needs an ADSR envelope is because synth oscillators are either on/off with no other control over the volume.
#14
Open Discussion / Re: Automatic center punch
May 09, 2017, 12:37:10 AM
ya mine does the same thing, ive had it for years and i cant remember where i got it anymore. it has a pretty nice machined brass (i think) handle but i do have to open it up and mess around with the spring a bit.
#15
no the ehx is a 2.1mm connector, same as boss-style connector

yes, you should use an insulated jack.