Tube 12SA7 or Röhre 12SA7 ID2634, Pentagrid-Converter (Heptode), Octal (Int.Octal, IO) K8A, USA 1935 and Pentagrid (new) shown. Radio tubes are valves

The 12SA7 is a pentagrid converter for use as a mixer oscillator in superhet receivers. The design is quoted by RCA as optimised to increase stability. The RCA brand. RCA introduced the glass disc sealed into metal envelope designs in 1935. The thin metal tube envelope is 25 mm in diameter, and excluding the IO base pins is 51 mm tall.

Title: 12SA7 12SA7GT Author: Tung-Sol Subject: JA-FP-2005-11-20 Created Date: 11/20/2005 12:33:58 PM

Basic heptode-based self-oscillating pentagrid converter circuits. The pentagrid converter is a type of radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver.

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The 12sa7 tube, also known as a pentagrid converter, is a type of vacuum tube that serves as a key component in the early stages of audio amplification. Its unique design and functionality enable it to perform multiple tasks, including signal mixing, local oscillator amplification, and frequency conversion.

Name: 12SA7 Use: Metal tube type used as converter in ac/dc receivers. Notes: Requires an octal socket.

View results and find 12sa7, tube datasheets and circuit and application notes in pdf format.

The 12SA7GT is a pentagrid converter for use as a mixer oscillator in superhet receivers. The design is quoted by RCA as optimised to increase stability. This exhibit has the base wires passing into the plastic base without further support.