inside an EL84…
a close-up picture of the guts of a JJ EL84 with all it’s grids exposed. such a seemingly odd and fascinating device.
solid-state tremolo for tube amps…
i’ve have a CBS-era Fender Bantam Bass in for repair that looks like a bowl of spaghetti inside the chassis. it’s a slew of yellow wire spread from one side
the Triode: final build
final build of my take on the Mitsumin Valvecaster.
Ampeg Super Jet SJ-12T repair…
I’ve seen a lot of the same complaints on various forums regarding these amps. Basically, the amp starts to get noisy and the occasional arcing can be heard through the
NOAA 19 APT copy…
just a copy with a homebrew 2m ground plane antenna on the roof top with the FT-60. pretty surprising results considering the antenna isn’t even tuned for 137MHz.
arduino temperature TV…
kind of a goofy experiment, but really useful. i’ve had a lot of LM335Zs laying around for a while. my christmas present this year was a new Arduino Mega 2560
simple phase shift oscillator…
a practice in designing an oscillator. this particular circuit employs a 2N2222A transistor on 6 volts. i used this Electronic-Tutorials.ws page to design the circuit. there were many reasons for
light bulb current limiter…
homemade light bulb current limiter. i’ll add more to this later.