RIAA preamplifier (T373E)

This preamplifier for magnetic phonocaptor was found in the 1961 RCA tube manual. The same circuit appears in manuals from other times.

Voltage Doubler (MSB021E)
Figure 1 shows a hal-wave voltage doubler operating with the Power-supply voltage. Output current...
PCM186x and PCM186x Q1 Universal Front End Audio ADCs - Texas Instruments
September 2017 - Texas Instruments PCM186x and PCM186x-Q1 Audio ADCs can be found at Mouser...
High Power Ultraviolet LEDs - Wurth Elektronik
September 2017 - Würth Elektronik High Power Ultraviolet LEDs can be obtained from Mouser...