Weekend 57U (Lo) 9414

Schaub und Schaub-Lorenz

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  • Année
  • 1957/1958
perfect model
  • Catégorie
  • Radio - ou tuner d'après la guerre 1939-45
  • Radiomuseum.org ID
  • 5979

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

 Spécifications techniques

  • No. de tubes
  • 6
  • Principe général
  • Super hétérodyne, conversion double ou triple; FI/IF 460/10700/6700 kHz
  • Circuits accordés
  • 7 Circuits MA (AM)     10 Circuits MF (FM)
  • Gammes d'ondes
  • PO, GO, OC et FM
  • Tension / type courant
  • Secteur et Piles (tous types). / 110; 127; 155; 220 DEAC D2 & 90 Volt
  • Haut-parleur
  • HP dynamique à aimant permanent + bobine mobile / Ø 12 cm = 4.7 inch
  • Puissance de sortie
  • 0.15 W (qualité inconnue)
  • Matière
  • Cuir / canvas / plastique mais autre matériel en dessous!
  • De Radiomuseum.org
  • Modèle: Weekend 57U 9414 - Schaub und Schaub-Lorenz
  • Forme
  • Portative > 20 cm (sans nécessité secteur)
  • Dimensions (LHP)
  • 292 x 210 x 118 mm / 11.5 x 8.3 x 4.6 inch
  • Remarques

  • Im UKW-Bereich arbeitet Weekend 57U als Doppelsuper.

    Siehe auch Weekend 57U 9014.
    Die Herkunft der Bezeichnung "Lo" ist unbekannt.

  • Poids net
  • 4.4 kg / 9 lb 11.1 oz (9.692 lb)
  • Prix de mise sur le marché
  • 265.00 DM
  • Littérature
  • -- Original-techn. papers.

 Collections | Musées | Littérature

Collections

Le modèle Weekend 57U (Lo) fait partie des collections des membres suivants.

 Forum

Contributions du forum pour ce modèle: Schaub und Schaub-: Weekend 57U 9414

Discussions: 1 | Publications: 1

Technically yes, this radio has dual conversion. But Dual Conversion is usually on Short Wave (HF) to get IF good image rejection (High 1st IF) and narrow bandwidth (low 2nd IF).

In this case the 2nd conversion is so as to get some gain advantage from the DK96 Heptode Mixer/Osc usually disabled on AM/FM battery sets on FM, though technically it's possible to use it as an amplfier rather than Oscillator (on g2 as an "anode") and Mixer.

On LW, MW & SW the circuit is like any other AM set, but with 2 x IF Amps (which is the case on the Vidor Vanguard AM/FM valve (tube) Portable and some more deluxe AM models too), but the first DF96 stage is only single tuned. On VHF-FM the DF97 stage is also like any other Triodised Additive Mixer/Osc with 10.7MHz. The DK96 is then running with a fixed L.O. to convert the 10.7MHz to 6.7MHz. On VHF the first 460kHz tuned stage on the DK96 anode is "shorted out".

Design of true Dual Conversion Shortwave set though is possible with this valve line up. In this case one of the DF96 would be before the DK96 and on LW & MW only one IF amp, but the DF96 could be an RD preamp. The DF97 would be a LO only on SW and the DF96 a Mixer / 1st IF amp as on the Vidor Vanguard which uses only DF97 for ALL the AM & FM RF, Mixer and IF functions. On SW the DK96 would be 2nd conversion from 10.7MHz to 460KHz. In this hypothetical re-design the DK96 could be used as it is currently, but the 1st DF96 moved to before the DK96 might be better as a DF97, though the DF96 does work.

Michael Watterson, 14.Jul.13

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