• Anno
  • 1923 ?
  • Categoria
  • Altoparlante, cuffia o auricolare
  • Radiomuseum.org ID
  • 186310

 Specifiche tecniche

  • Gamme d'onda
  • - senza
  • Tensioni di funzionamento
  • Alimentazione non richiesta
  • Altoparlante
  • Tromba
  • Materiali
  • Mobile di metallo
  • Radiomuseum.org
  • Modello: Thorola No. 4 - Thorola, Winkler-Reichmann Co.
  • Forma
  • Soprammobile verticale (sviluppato in altezza; no cattedrale, sin decorazioni).
  • Annotazioni
  • The Thorola loudspeaker No. 4 has a gooseneck horn.
  • Prezzo nel primo anno
  • 25.00 $
  • Fonte esterna dei dati
  • ad QST September 1925, page 83.
  • Fonte dei dati
  • - - Manufacturers Literature
  • Letteratura / Schemi (1)
  • Radio Horn Speaker Encyclopedia, Floyd A. Paul, p. 74
  • Letteratura / Schemi (2)
  • Radio Broadcast, Jan. 1926, p. 349
  • Autore
  • Modello inviato da Ernst Erb. Utilizzare "Proponi modifica" per inviare ulteriori dati.

 Collezioni | Musei | Letteratura

Collezioni

Il modello Thorola fa parte delle collezioni dei seguenti membri.

 Forum

Discussioni nel forum su questo modello: Thorola, Winkler-: Thorola No. 4

Argomenti: 1 | Articoli: 3

Hello to all. I am a novice trying to restore a Thorola Model 4 horn speaker that goes with my Thorola Model 55 radio and have two questions.

I need to rewind the wire on the coil that sits in the magnets in the base of the speaker. I have checked info in the museum and it seems these types of speakers are 1k, 2k, or even 4k ohms. What should the resistance be on this speaker?

Secondly, if I rewind the coil and the resistance is "low" can I add a resister to bring it up to the correct value? I'm planning on rewiring it with as much #28 wire as I can get on there. Or should I use #32 or #40?

It appeares that someone had taken this apart before because the inside of the base is a mess. The original wire on the coil had come unwound because the spool was broken so there was no way to measure the original resistance. The original wire is extremely fine.

Thanks.

Al Amato, 17.Aug.16

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