The Cicada: a push-pull vacuum tube amplifier build abram, August 8, 2017October 12, 2017 Well, 2017 is more than half over now. This means I should probably post something to get at least one post in for this year. I’ve been meaning to do a write up about this project for a while, but time isn’t as freely available as I would like it… Continue Reading
inside an EL84… abram, May 26, 2013 a close-up picture of the guts of a JJ EL84 with all it’s grids exposed. such a seemingly odd and fascinating device. Continue Reading
solid-state tremolo for tube amps… abram, May 19, 2013July 27, 2020 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 to the other that resembles the web of a drunken spider. the amp has been modified to include a tremolo,… Continue Reading
the Triode: final build abram, May 2, 2013 final build of my take on the Mitsumin Valvecaster. Continue Reading
Mistumin Valve Caster build… abram, February 16, 2013February 16, 2013 a tube overdrive build for Anthony of the The New Diet and The Regular Fucked Up People. it’s my take on the Mitsumin valve caster with the values i tend to use and a Telefunken 12AX7. excuse the ugliness for this one is just the prototype. four sections of clean… Continue Reading
no. 5 re-appropriation… abram, February 16, 2013 this is a re-appropriation of a Fender Frontman 15-B. it’s one 8″ speaker in a closed cabinet primarily designed as a really cheap bass amp to be included in starter packs. having gutted the amp a few years ago and replaced it with the contents from the No. 5 tube… Continue Reading
5W single-ended EL84 amp (before) abram, November 22, 2012 insides of a Fender 15B solid-state bass amp that i gutted and converted into a simple tube circuit. i constructed this several years ago, and it’s not been very functional as of late. it definitely needs a better chassis ground, and i’d like to add in a switch for triode/pentode… Continue Reading
Ampeg SVT-CL Repair abram, October 24, 2012November 15, 2012 here’s a 300 watt Ampeg SVT-CL that i had on the bench today. a much different kind of amp from the 70s models that i’ve been more accustomed to working on in the past. this one had no sound or output and the fault light would stay on constantly. i… Continue Reading
No. 5 speaks. abram, August 8, 2010April 24, 2017 and what a lovely voice it is. even through a Crate speaker (i’m saving the better speakers for when the testing phase is over). overall, i’d say a success for cheap transformers, Radio Shack parts, and a few pieces taken from a busted computer power supply. audio notes: it was… Continue Reading
No. 5 come alive! abram, August 4, 2010August 8, 2010 like Dr. Frankenstein, it’s about time to bring this little fellow to life… or at least try. the schematic i have is a random luck of the draw internet find, and i have no idea whether or not it will work. however, testing will occur on the work bench soon… Continue Reading