Manufacturers
- Saba
- Sage Instruments
- Sailor
- Samar
- Samlex America Inc.
- Samsung
- Sangean
- Sansui
- Sanwa
- Sanyo
- SBE Sideband Engineers Inc.
- Schaevitz MCD
- Schaffner
- Schaub-Lorenz
- Schlumberger
- Schomandl
- Scientific Atlanta
- Scientific Audio Electronics
- Scopex Instruments Ltd
- SEA Incorporated
- Seco Manufacturing Company
- Sefram
- Seiki Electronics
- Seiko I Infotech Inc.
- Semcor
- Sencore
- Sennheiser Electronic
- Sequential Circuits
- Setton
- Seung Yong
- SGC Inc.
- Sharp
- Sherwood
- Shishi Feitong Communication Equipment
- Shure
- Siare
- Siel
- Siemens
- Sigma Corporation
- Signal Communication
- Signal One
- Silver Marshall Inc.
- Simpson
- Sinclair
- Singer
- Singer Instrumentation
- Sinudyne
- Skanti
- Skuttle
- Slade Radio PTY LTD
- Slaughter Company
- SMC South Midlands Communications
- Smiths Radiomobile
- SOCIETE FRANÇAISE RADIO - ÉLECTRIQUE
- Sodilec
- Solar Manufacturing Corporation
- Solartron
- Sommerkamp
- Sony
- Sony Ericsson
- Sorensen Company
- Soundcraft Electronics
- Sound Technology
- Soundtracs PLC
- Spectracom
- Spectrian Corporation
- Spectro Acoustics
- Spectronics
- Spilsbury Communications Ltd.
- Spirent Communications Inc.
- Sportys
- SP Radiotechnika Wroclaw
- Spraque Electric Company
- SRS Stanford Research Systems
- SSB Electronic
- Stancor Standard Transformer Corporation
- Standard Communications
- Standard Radio & Telefon AB
- Star Instruments
- Stark
- Statron
- STC Standard Telephones and Cables
- Stearns Magnetics
- Stoelting
- Stromberg-Carlson
- Studer
- Subaru
- SunBrite
- Sun Microsystems
- Superior Instruments
- Superstar
- Supreme Instruments Corporation
- Swan Electronics Corp.
- Sylvania Electric Products
- Symetrix
- Systron Donner
Interesting Manuals
Machines of Class 15, central bobbin, for manufacturing purposes, are made in several varieties as described below. They can be driven either by mec
Kikusui COR5500U series Oscilloscopes are available in eight models, with different combinations of frequency bandwidths and a digital storage funct