• Pays
• Japon

• Fabricant / Marque
• Meguro Electronics Corporation; Tokyo

• Année
• 1975

• Catégorie
• Appareils de mesure et de dépannage (matériel de labo)

• Radiomuseum.org ID
• 309429

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

• No. de tubes
• 1

• Lampes / Tubes
• 130ARB1

• No. de transistors
• Semi-conducteurs présents

• Semi-conducteurs

• Principe général
• Super hétérodyne (en général); FI/IF 455/10700 kHz

• Gammes d'ondes
• Bandes en notes

• Tension / type courant
• Alimentation Courant Alternatif (CA) / 220 Volt

• Haut-parleur
• - - Pas de sortie basse fréquence

• Matière
• Boitier métallique

• De Radiomuseum.org
• Modèle: AM-FM Radio IF Genescope MSW-721D - Meguro Electronics Corporation

• Dimensions (LHP)
• 220 x 345 x 460 mm / 8.7 x 13.6 x 18.1 inch

• Remarques

• This is essentially a 'Wobulator' for 455 KHz and 10.7 MHz IF alignment.

  Band A uses outer controls for 455 KHz centre frequency. It can sweep 400 KHz to 500 KHz approximately.

  Marker Frequencies Band A: 445, 455, 465 KHz.

  Crystal reference is 555kHz and thus the Hartley VCO is centred at 100 KHz.

  Band B uses inter controls for 10.7 MHz centre frequency. It can sweep 9.5Mhz to 11.5 MHz approximately.

  Marker Frequencies Band B: 10.55, 10.70, 10.85 MHz.

  Crystal reference is 12.05 MHz and thus the Hartley VCO is centred at 1.35 MHz.

  Operation

  The crystal oscillator for band A or B is mixed with the VCO. The VCO is used for both bands via coil switching. The output is fed to a gain control and attenuator to drive the radio under test.

  The markers are not output. They are LC oscillators at the actual frequency. A mixer with filters is used to add them to the input channel, beating against the main up-converted output. The input channel (Y-axis) has a 20 dB attenuator option and a calibration reference. It's assumed the input is connected to the AM detector or FM discriminator, otherwise a user supplied peak detector can be used.

  Input sensitivity: 10 mV per cm, or more. 20dB attenuator switch.

  The sweep sawtooth is generated from one 1/2 cycle of the AC mains, so is 30 Hz or 25 Hz. the other half of the time period is blanking. The drive to the VCO varicap can be reduced to zero sweep.

  The MSW-710D is mentioned in the manual (455KHz only) as is the MSW-720D (10.7MHz), they simply omit markers, band switch and a crystal oscillator, if they actually existed. The MSW721E is similar but with IEC mains socket, switched supply voltages and more markers on each band, possibly 5. The MSW721D was ordered as 100, 115, 220 or 230 according to the manual. The 220V is the standard version.

• Poids net
• 14 kg / 30 lb 13.4 oz (30.837 lb)

• Auteur
• Modèle crée par Michael Watterson. Voir les propositions de modification pour les contributeurs supplémentaires.

• D'autres Modèles

• Vous pourrez trouver sous ce lien 12 modèles d'appareils, 12 avec des images et 4 avec des schémas.
  Tous les appareils de Meguro Electronics Corporation; Tokyo