72LB Lowboy Ch= 7H3

Crosley Radio Corp.; Cincinnati (OH)

Datos
Foro
Imágenes
Colecciones

  • Año
  • 1934
  • Categoría
  • Radio - o Sintonizador pasado WW2
  • Radiomuseum.org ID
  • 36980

Haga clic en la miniatura esquemática para solicitarlo como documento gratuito.

 Especificaciones técnicas

  • Numero de valvulas
  • 7
  • Principio principal
  • Superheterodino con paso previo de RF; ZF/IF 456 kHz
  • Gama de ondas
  • OM y OC
  • Tensión de funcionamiento
  • Red: Corriente alterna (CA, Inglés = AC) / 110 Volt
  • Altavoz
  • Altavoz electrodinámico (bobina de campo)
  • Material
  • Madera
  • de Radiomuseum.org
  • Modelo: 72LB Lowboy Ch= 7H3 - Crosley Radio Corp.;
  • Forma
  • Consola baja, patas más cortas del 50%.
  • Anotaciones
  • A.V.C. controlled 1. AF-amplifier - see schematics
  • Ext. procedencia de los datos
  • Ernst Erb
  • Referencia esquema
  • Rider's Perpetual, Volume 5 = ca. 1934 and before

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Colecciones

El modelo 72LB Lowboy es parte de las colecciones de los siguientes miembros.

 Forum

Contribuciones en el Foro acerca de este modelo: Crosley Radio Corp.;: 72LB Lowboy Ch= 7H3

Hilos: 2 | Mensajes: 8

After collecting dust for three years I sent this chassis off for repair to find out that the transformer was shorted out, the speaker was shorted out and other major problems.  Turns out the repairman had another 7H3 chassis in a bad tombstone cabinet.  We worked a deal and he repaired that chassis for my loboy cabinet.  She's up and running now!

A big thank you to Mario and all the rest of you who helped me.  I've uploaded some pictures of the finished project.  It plays beautifully with excellent reception on the broadcast band, but few stations in my area for good a.m. selection.

Dave

Dave Turner, 05.Jul.12

Weitere Posts (2) zu diesem Thema.

I've been "studying" this old chassis for a while.
I put it on my dim bulb tester with a 60w bulb and the bulb does not dim, and none of the tubes light up.  However, two tubes, (69 and 70 on the schematic) a 6D6 and a 6B7, have broken cap connections.  I've ordered two new tubes to replace but don't have them yet.
Meanwhile, since this is a 75W or 100W power requirement, I exchanged the bulb for a 250W, (didn't have a 75 or 100), turned it on and the 250 bulb is very dim and the chassis started to smell and I could hear it "cooking". Transformer was getting warm.
 
Did I burn it up?
 
I'd really like to get this old radio running, but fear a new transformer will be pretty costly, and have no idea where to search for one.  The whole radio is probably worth a hundred bucks.
 
Hope you can give me some ideas.
Dave

Dave Turner, 02.Apr.09

Weitere Posts (6) zu diesem Thema.