Above, a 'distortionless' equalizer circuit circa 1961 as designed by one Carlos Moura. Separate bass and treble boost functions (2…
Many of my regular readers will be familiar with the Shure Level-Loc. For those unfamiliar, the basics: the Level-Loc is…
Above: Belden 8411, 8422, and 8412 microphone cable. I still use Belden 9451 for most studio hard-wiring tasks, although I…
Download a 24pp pdf with schematics and technical information regarding all AWA-brand vacuum-tube broadcast audio amplifiers circa 1967: DOWNLOAD: ABCstudioEquipment…
Sometime in the past couple of years, Tape Op ran a short piece by Allen Farmelo titled "Using Transformers to…
PS dot com reader Paul R. was kind enough to send us a scan of "Audio Anthology," (ed. C.G. McProud)…
image source NOTE: the above unit eventually did sell on eBay for $35,000. See below for scan... Here's something that…
UPDATE: since this article seems to get an enormous number of pageviews, I thought I should mention that we did…
My latest microphone preamp design is completed and sounding very cool... The Old '76. The Old '76 is a novel…
The Stancor '306' 6-watt PP audio amplifier Download the 1937 ('third edition') of Stancor Transformers' 'Amplimanual,' a 24pp publication which…