As we discussed in previous posts, the Altec 438A is an audio compressor designed in the late 1950s primarily for…
The Leslie Model 51 is a single-speed, large Leslie unit with 2 amps, a 15" woofer, a rotating horn, and…
Alright! So earlier this week I described the successful completion of the RCA OP-6/BA-2 microphone preamp. Check out this previous…
The vacuum-tube powered program EQ that I described in this previous post is nearly complete. This thing has sat on…
(image source) The RCA OP-6 'Portable Amplifier' is one of a handful of truly visually-iconic vintage mic preamps. The OP-6…
In a previous post, we looked at the Altec 436 vari-mu tube compressor. I built one of these a few…
Ah the classic Altec 436C compressor (see here for previous coverage on PS dot com). Here's a fresh high-res scan…
Above: a very minimal single-ended stereo amplifier with very low gain, designed to accept headphone-level input from an iPod or…