From BROADCAST ENGINEERING Mag, circa 1964, plans by one Robert Tiffany on the design and construction of a low-cost 'standby'…
So I was flipping through Recording The Beatles recently and I was reminded that I had yet to make one…
Langevin stereo console circa 1959 Today: from the "Audio Cyclopedia," Howard Tremaine, 1959: a quick visual survey of professional mixing…
Download a 24pp pdf with schematics and technical information regarding all AWA-brand vacuum-tube broadcast audio amplifiers circa 1967: DOWNLOAD: ABCstudioEquipment…
Above: The BRDCSTR, a two-stage vacuum-tube microphone preamp inspired by classic 1940s broadcast audio preamps. Single-ended design with a 6SJ7…
My latest microphone preamp design is completed and sounding very cool... The Old '76. The Old '76 is a novel…
Download the fifty-page 1940 PRESTO RECORDING CORP catalog: DOWNLOAD (part 1): Presto_1940_Cat_1 DOWNLOAD (part 2):Presto_1940_cat_2 Products covered, with text, some…
Alright! So earlier this week I described the successful completion of the RCA OP-6/BA-2 microphone preamp. Check out this previous…
(image source) The RCA OP-6 'Portable Amplifier' is one of a handful of truly visually-iconic vintage mic preamps. The OP-6…
Circuit for a simple bass/treble parametric equalizer that uses no inductors. Could be a useful piece. Not sure if 250k/500k…