Jeep XJ: no start, no spark, resolved!
after more than two weeks of not being able to start up the XJ, i was finally able to resolve the issue. turns out the ignition coil had gone bad.
Author: abram
PT2399: nuances…
i’ve been wrapped up in Jeep repair lately as there’s some sort of issue prevent the beloved XJ from firing up. i have, however, in the meantime had some time
initial test of a modulated PT2399 circuit…
a breadboard version of some PT2399 modifications i’ve been working on. there are a lot of DIY schematics that utilize the PT2399 (Magnus Modulus, Echo Base delay, Rebote, etc.). i’ve
MOSFET overdrive… final build?
i might add some labels for the pots and contact info, but it’s done for the most part.
simple LFO circuits…
i was reading over this thread on diystompboxes.com about building an analog LFO circuit for some wild noise idea i’ve got brewing in the back of my head. i started
TDA2040 PCB layout…
backlit PCB layout of the TDA2040 solid-state amp i’ve been working on. i’m still using perf boards until i wrap my head around designing PCB layouts in EagleCAD. i do
TDA2040-based amp schematic with EQ…
well here’s the first draft of the simplest medium powered solid state design i could muster. TL082 can easily be substituted with a TL072 which is probably better anyhow (i
Sinometer 10MHz oscilloscope…
simple. cheap. a thing of beauty to add to the ol’ workbench.
experimental PTT signaling switch…
this is an experimental circuit i threw together today. i’ve been working on getting a VOX circuit to work with the Yaesu FT-60R (VX-3R, VX-5, etc.) and Soundmodem on the