Predicta Holiday G4242M Ch= 9L37

Philco, Philadelphia Stg. Batt. Co.; USA

Données
Forum
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  • Année
  • 1959 ?
  • Catégorie
  • Récepteur de télévision ou moniteur
  • Radiomuseum.org ID
  • 104838

Cliquez sur la vignette du schéma pour le demander en tant que document gratuit.

 Spécifications techniques

  • No. de tubes
  • 16
  • Principe général
  • Super hétérodyne (en général); FI/IF 45750 kHz
  • Gammes d'ondes
  • Bandes en notes
  • Tension / type courant
  • Alimentation Courant Alternatif (CA) / 110-120 Volt
  • Haut-parleur
  • HP dynamique oval à aimant permanent / Ø 4 inch = 10.2 cm
  • Matière
  • Matériaux divers
  • De Radiomuseum.org
  • Modèle: Predicta Holiday G4242M Ch= 9L37 - Philco, Philadelphia Stg. Batt
  • Forme
  • Modèle de table générique
  • Dimensions (LHP)
  • 23.5 x 27.5 x 14.5 inch / 597 x 699 x 368 mm
  • Remarques
  • The Philco G4242M is a 21" b/w TV with US standard VHF tuner channels 2 thru 13. Equipped with chassis 9L37, VHF tuner T-68G and picture tube 21EAP4 or SF21A. Cabinet is Mahogany. Swiveling top-mount CRT enclosure. Built-in telescoping antenna. NOTE: a common replacement CRT for the 4242 is the 21FDP4 (this requires a slight mod to the filament circuit as it is a 6.3V heater as compared to the original 2.3V; the mod: a short across the 8 ohm section of the filament resistor)
  • Source
  • - - Data from my own collection
  • Schémathèque (2)
  • - - Manufacturers Literature
  • Auteur
  • Modèle crée par Thomas Albrecht. Voir les propositions de modification pour les contributeurs supplémentaires.

 Collections | Musées | Littérature

Collections

Le modèle Predicta Holiday G4242M fait partie des collections des membres suivants.

Musées

Le modèle Predicta Holiday G4242M peut être vu dans les musées suivants.

 Forum

Contributions du forum pour ce modèle: Philco, Philadelphia: Predicta Holiday G4242M Ch= 9L37

Discussions: 1 | Publications: 1

In order to make the picture tube housing more compact for its Predicta line of TVs, Philco created a new cathode ray tube (CRT) design with a very compact electron gun and a short tube neck.  Unfortunately, CRTs with this new design turned out to have a very short life.  CRTs failed after only a few years of use, severely damaging Philco's reputation in the TV business, and contributing to Philco's exit from the TV business and sale of the company to Ford.

Today, almost all Predictas which have the original tube intact have low emission on the CRT.  When testing, be careful, since the 21EAP4/SF21A CRT has a 2.5 volt heater (unlike almost all other CRTs from that era, which have 6.3 volt heaters).  Applying 6 volts can burn out the heater.  If the CRT is bad, there are several companies that rebuild CRTs, and the Predicta, with its relatively high value among collectors, is one of the few sets for which CRT rebuilding makes economic sense.

Tom

Thomas Albrecht, 03.Sep.06

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