I believe it’s time to put an end to this kind of insanity. There can be no economic growth if human beings continue to be reckless with the environment that supports them. Clean air, water, and soil are necessary for all life to flourish. That ought to be a priority.
Differential Amplifier w/ Cathode Follower
This is a circuit designed for a classroom project whereby the instructions were to “improve” a differential amplifier circuit. The differential amplifier design is essentially an exercise in understanding the inner workings of an opamp, and it effectively works in the same way. The figure below is a schematic for the differential amplifier without the…
Already Dead: Family Reunion VI
Already Dead Tapes releases Document II
AD200 'Document II: A Retrospective' by Already Dead Tapes and Records “As we march along on our mission to create a diverse and expansive creative community, we reach a new milestone: 200 releases. To this end, we bring you ‘Document II’, a retrospective cassette that comes with a Golden Ticket good for downloads of our…
Pixie: 40m QRP CW transceiver
first post of 2015. it’s a small pocket size 40m CW transceiver that i got off of eBay for a mere $8. i’ve mainly used this while i’m at school to flex my cognitive abilities and decode the communications of extra class morse pros. the transceiver has a tuning range of 7.023-7.026MHz (maybe) which puts…
DOD FX55B SupraDistortion – BigBuff Mod
Here’s another in a line now of DOD pedal mods. For this FX55B, I decided to go for more of a BigMuff sound. Playing around with this pedal initially, I found it to be like most mass-produced distortion/fuzz effects. It had a very thin sound and that notorious volume drop that you may have heard…
Class AB amplifier test
this was an attempt at designing a simple transformer-less class AB amplifier using two BJT power transistors. i setup the USB fan to protect against thermal runaway and cool off the transistors during operation. it took me looking over several schematics to realize that the the emitters of both the PNP and NPN transistors were…
initial PCB milling test…
here’s an initial PCB test for the Triode tube overdrive on the SMBA site. this picture is pre-sanding. it was milled using LinuxCNC on a Xubuntu 14.04 LTS running the Xenomai-2.6.2.1 kernel version 3.5.7. it’s taken some time to get the configuration working and compiled since i didn’t want to use the live CD. the…
vacuum tube experimentation
modifying the mitsumin valvecaster by determining distortion characteristics.