• Country
• United States of America (USA)

• Manufacturer / Brand
• Stromberg-Carlson Co. ; Rochester (NY)

• Year
• 1941

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 171601

• • Brand: Te-Lek-Tor-Et

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 14

• Valves / Tubes
• 6AB7 6AC7 or 7V7 6SA7 6SK7 6U5 6SQ7 6AC7 6SJ7 6SJ7 6H6 6SC7 6F6G 6F6G 5U4G

• Main principle
• Superhet with RF-stage; ZF/IF 455/4300 kHz; 3 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)     11 FM circuit(s)

• Wave bands
• Broadcast, Short Wave plus FM or UHF.

• Power type and voltage
• Alternating Current supply (AC) / 105-125 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12 inch = 30.5 cm

• Power out
• 10 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 925-L - Stromberg-Carlson Co. ;

• Shape
• Console with any shape - in general

• Dimensions (WHD)
• 31.125 x 38.875 x 13.1875 inch / 791 x 987 x 335 mm

• Notes

• BC (540-1600 kHz), SW (8.8-12.0 MHz bandspread) and FM (42.0-50.0 MHz) bands. Six station buttons, tuning eye, push-pull audio amplifier. For 50 to 60 Hz AC.

  FM tuning range is from 21-99 on the dial.  These values are FM station numbers, similar in concept to TV station numbering.  The FM station assignments 21-99 correspond to frequencies from 42.1 to 49.9 MHz.

  After restoration, tested amp performance with HP8903B analyzer. Lowest THD was 0.94% at 1kHz.  This occurred at about 750mW output.  The maximum setting on the volume control produced 9.6W, and the corresponding THD was approximately 10%.

  Chassis has an external "bass resonator" that creates a broad peak in the frequency response, measured +7.5dB @ 100Hz.  

  Bass and Treble controls interact, and pre-date the Baxandall design.  Treble control action set to max produces +2dB peak at 5kHz; at minimum it produces a steady roll-off above 1kHz; down 7.9dB at 8kHz.  Bass control set to max produces +8.7dB peak at 100Hz and when set to min produces +2.4dB at 100Hz.  

  The radio sounds very rich and warm.

• Circuit diagram reference
• Rider's Perpetual, Volume 13 = 1942 and before

• Mentioned in
• Rider's 13-11 to 13-16

• Literature/Schematics (3)
• Stromberg-Carlson Cir. #1043, Season 1941

• Author
• Model page created by Götz Linss † 27.06.21. See "Data change" for further contributors.

• Other Models

• Here you find 878 models, 493 with images and 753 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Stromberg-Carlson Co. ; Rochester (NY)