509X Radio-Phonograph

Philco, Philadelphia Stg. Batt. Co.; USA

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  • Année
  • 1934/1935
  • Catégorie
  • Radio - ou tuner d'après la guerre 1939-45
  • Radiomuseum.org ID
  • 51088

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

 Spécifications techniques

  • No. de tubes
  • 10
  • Principe général
  • Super hétérodyne avec étage HF; FI/IF 260 kHz
  • Gammes d'ondes
  • PO et OC
  • Particularités
  • Tourne disque sans changeur
  • Tension / type courant
  • Alimentation Courant Alternatif (CA) / 115 Volt
  • Haut-parleur
  • HP dynamique à électro-aimant (électrodynamique)
  • Puissance de sortie
  • 15 W (qualité inconnue)
  • Matière
  • Boitier en bois
  • De Radiomuseum.org
  • Modèle: 509X Radio-Phonograph - Philco, Philadelphia Stg. Batt
  • Forme
  • Console de forme générique
  • Remarques
  • The Philco model 509X is a limited edition super deluxe high fidelity radio-phonograph using the same ten-tube two-band chassis as the 201X high fidelity radio. Only 500 units were built, and at a price of $600, were affordable only to the very rich.

    Like the model 201X, the 509X covers the BC and SW (4.2-12 MHz) bands and has variable IF bandwidth to trade off selectivity versus fidelity, controlled by a three-gang potentiometer to adjust the Q of two of the three IF transformers and the gain of both IF stages. Unlike most radios of its day, which were restricted to about 4 kHz of audio bandwidth, the 509X, like the 201X, has 7.5 kHz of bandwidth at its maximum fidelity setting. The circuit includes a 10 kHz audio filter to remove the high pitched heterodyne that could be caused by the carrier of an adjacent channel. In addition to the fidelity-selectivity control, which functions somewhat like a treble control, there is a bass compensation switch. The chassis has a shadow meter (tuning aid) with its own dedicated control tube (unlike other Philco designs where the shadow meter simply indicates B+ current to the RF and/or IF stages). The push-pull output stage, with one 42 driver tube and two 42 output tubes, delivers 15 watts of undistorted output.

  • Prix de mise sur le marché
  • 600.00 $
  • Source extérieure
  • Ernst Erb
  • Source du schéma
  • Rider's Perpetual, Volume 6 = 1935 and before
  • Schémathèque (1)
  • Philco 1928-36 Wiring Diagrams, Parts Lists, and Essential Service Data

 Collections | Musées | Littérature

Collections

Le modèle 509X fait partie des collections des membres suivants.

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