DeLuxe RF Preselector II MFJ-1040B

MFJ Enterprises; Starkville (MS)

  • Année
  • 1981 ?
  • Catégorie
  • Appareil amateur (divers et sans touches)
  • Radiomuseum.org ID
  • 335102

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

 Spécifications techniques

  • No. de transistors
  • 5
  • Gammes d'ondes
  • PO et plus que 2 x OC
  • Tension / type courant
  • Alimentation externe ou alimentation principale / 9-18 Volt
  • Haut-parleur
  • - - Pas de sortie basse fréquence
  • Matière
  • Boitier métallique
  • De Radiomuseum.org
  • Modèle: DeLuxe RF Preselector II MFJ-1040B - MFJ Enterprises; Starkville MS
  • Forme
  • Portative > 20 cm (sans nécessité secteur)
  • Dimensions (LHP)
  • 8.25 x 7 x 2.25 inch / 210 x 178 x 57 mm
  • Remarques
  • The MFJ-1040B RF preselector boosts signals from 1.8 to 54 MHz. It utilizes a dual gate MOSFET, and bipolar transistors for low noise and high gain. Gain is up to 20dB.
    Push-button switches are provided for two receivers, two antennas, 20 dB
    attenuator and ON/BYPASS. The band switch selects: 1.8-3, 3-6, 6-15 and 15-54 MHz. Controls are provided for Delay, Gain, Band and Tune.

    Unlike most preselectors which are for receive-only, the MFJ-1040B may be used with a transceiver. Its relay will automatically bypass the RF amplifier when transmitting a signal up to 350 watts PEP input. A push-to-talk connection is also provided as an option.

    Ads note the unit's ability as, "Lets you copy weak, barely readable signals. Rejects out-of band signal images. Strong signal ability reduces cross mod over loading. Excellent signal to noise ratio."  For very strong signals, the 20 dB attenuator switch would be used.

    Rear panel jacks are provided for the use of either RCA phono plugs or PL-259
    connectors for antenna and receiver/ transceiver.  Initially priced at $99.95. Requires a 12 VDC 300ma AC Adapter such an the optional MFJ-1312 power cube sold separately for $7.95. 

    The near-identical earlier model MFJ-1040 was reviewed in Amateur Radio in February 1981.

     

     

  • Prix de mise sur le marché
  • 99.95 USD
  • Littérature
  • Radio Amateur, February 1981 (MFJ-1040)
  • Schémathèque (1)
  • MFJ-1040B manual
  • Auteur
  • Modèle crée par Rich Post. Voir les propositions de modification pour les contributeurs supplémentaires.

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Le modèle DeLuxe RF Preselector II fait partie des collections des membres suivants.

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