• Pays
• Taiwan (Republique de Chine)

• Fabricant / Marque
• Sangean; Chung Ho City

• Année
• 1992 ?

• Catégorie
• Radio - ou tuner d'après la guerre 1939-45

• Radiomuseum.org ID
• 78113

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

• No. de transistors
• Semi-conducteurs présents

• Semi-conducteurs

• Principe général
• Super hétérodyne, conversion double ou triple; FI/IF 49995/450 kHz

• Gammes d'ondes
• PO, GO, plus que 2 x OC et FM

• Particularités
• Magnétophone à cassettes

• Tension / type courant
• Piles sèches / 4 x 1,5 Volt

• Haut-parleur
• HP dynamique à aimant permanent + bobine mobile

• Matière
• Plastique moderne (pas de bakélite, ni de catalin)

• De Radiomuseum.org
• Modèle: ATS-818CS - Sangean; Chung Ho City

• Forme
• Portative > 20 cm (sans nécessité secteur)

• Dimensions (LHP)
• 300 x 190 x 70 mm / 11.8 x 7.5 x 2.8 inch

• Remarques

• AM coverage 150 - 29999 kHz; AM, SSB(BFO); direct keypad frequency entry, 45 memories, clock/timer;
  Also sold as Siemens RK-670, Radio Shack Realistic DX-392 and Roberts RC818.

  From the European Service Manual for the Sangean ATS-818CS

  Wavebands
  LW: 150 - 519 kHz
  MW: 520 - 1620 / 1710 kHz
  SW: 1.621 / 1.711 - 29.999 MHz divided into 13 shortwave ranges. BFO for CW or SSB.
  FM:87.5 - 108 MHz, 10.7 MHz IF.

  AM Wide 6 kHz, AM Narrow 4.5 kHz (6 dB BW, nominal)

  Autoscan on AM and FM

  FM Stereo on headphone socket, built in 76 kHz PLL MPX decoder and stereo indicator.
  Tuning indicator.
  Keyboard for direct frequency input with 45 station memories.
  Clock with various switching and alarm functions.
   

  Connections
  3.5 mm stereo headphones
  External 6 V DC (nominal)
  AM aerial and earth.

  
  The integrated cassette drive has AC bias for recording and is stereo recording on FM and stereo playback on the earphone socket, 40dB channel separation.

  Minimum reliable operation is about 4V, +/- 0.2V.

  From the User Guide for the Sangean ATS-818CS

  The SW band has a second set of nine memories by using 0 as a prefix.

  The Standby mode is cancelled by holding C and Standby.

  Other comments

  • The erase appears to be a magnet, which reduces the dynamic range of recordings to about half.
  • The case on some versions may have a small hole in the speaker grill to access the motor speed control otherwise, contrary to the sevice manual you need to remove the main PCB and the cassette deck to adjust the speed, using an external 4.5V to 5V PSU to simulate the typical battery level.
  • The ATS-818 has a larger speaker as it's not constrained by the cassette deck.
  • The main difference of the ATS-818ACS (badged as Roberts RC828)appears to be extra memories, 54 rather than 45, and the silver effect finish.
  • The BFO on/off is separate to memory, so if using BFO on the Amateur bands and you select any MW, SW, LW memory you get a whistle till you turn off the BFO!
  • If Standby can't be cancelled: Remove one or more main cells and one AA cpu cell. Count to 20 after the time has completely faded. This resets the CPU.
  • The S meter displays the battery status for a few seconds after power off.
  • The 1720/1721 split rather than 1620 / 1621 split for MW (Broadcast) and SW may only be USA models.
  • AM is dual conversion, may be 49.995MHz  and 455 kHz, or 55.845 MHz and 450 kHz. The VHF-FM is 10.7 MHz only
  • The Manual mentions a Stereo indicator: There isn't any obvious indication, though the AM Wide / Narrow bandwitch switch enables and disables the stereo decoder.

• Poids net
• 2 kg / 4 lb 6.5 oz (4.405 lb)

• Prix de mise sur le marché
• 220.00 $

• Auteur
• Modèle crée par Martin Bösch. Voir les propositions de modification pour les contributeurs supplémentaires.

• D'autres Modèles

• Vous pourrez trouver sous ce lien 76 modèles d'appareils, 75 avec des images et 30 avec des schémas.
  Tous les appareils de Sangean; Chung Ho City