925-L

Stromberg-Carlson Co. ; Rochester (NY)

Dati
Forum
Immagini
Collezioni

  • Anno
  • 1941
  • Categoria
  • Radio (o sintonizzatore del dopoguerra WW2)
  • Radiomuseum.org ID
  • 171601
    • Brand: Te-Lek-Tor-Et

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

 Specifiche tecniche

  • Numero di tubi
  • 14
  • Principio generale
  • Supereterodina con stadio RF; ZF/IF 455/4300 kHz; 3 Stadi BF
  • N. di circuiti accordati
  • 7 Circuiti Mod. Amp. (AM)     11 Circuiti Mod. Freq. (FM)
  • Gamme d'onda
  • Onde medie (OM), corte (OC) e FM.
  • Tensioni di funzionamento
  • Alimentazione a corrente alternata (CA) / 105-125 Volt
  • Altoparlante
  • AP elettrodinamico (bobina mobile e bobina di eccitazione/di campo) / Ø 12 inch = 30.5 cm
  • Potenza d'uscita
  • 10 W (qualità ignota)
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: 925-L - Stromberg-Carlson Co. ;
  • Forma
  • Console di qualsiasi tipo
  • Dimensioni (LxAxP)
  • 31.125 x 38.875 x 13.1875 inch / 791 x 987 x 335 mm
  • Annotazioni

  • 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.

  • Riferimenti schemi
  • Rider's Perpetual, Volume 13 = 1942 and before
  • Bibliografia
  • Rider's 13-11 to 13-16
  • Letteratura / Schemi (3)
  • Stromberg-Carlson Cir. #1043, Season 1941

 Collezioni | Musei | Letteratura

Collezioni

Il modello 925-L fa parte delle collezioni dei seguenti membri.

 Forum