Newscaster ICF-7800

Sony Corporation; Tokyo

  • Year
  • 1976–1981 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 87395

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superheterodyne (common); ZF/IF 468 kHz
  • Wave bands
  • Broadcast, Short Wave plus FM or UHF.
  • Power type and voltage
  • Dry Batteries / 4 × 1,5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 7.7 cm = 3 inch
  • Power out
  • 1.5 W (unknown quality)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Newscaster ICF-7800 - Sony Corporation; Tokyo
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 136 x 95 x 70 mm / 5.4 x 3.7 x 2.8 inch
  • Notes
  • This model was developed as a result of returning to the concept that "transistor radios should be both small and offer high performance".  The unique design enabled the radio to be folded  for carrying and then unfolded for easy operation. It was nicknamed "Newscaster".

    The design of this and other models (see for example Sony TR-1818, Inno-Hit RS-580, Randix LCR-41) probably was inspired by Brionvega TS502.

    Reiseradio bei dem Lautsprecher und Bedienelemente erst nach dem Aufklappen zum Vorschein kommen. UKW (87,5-108 MHz) mit schaltbarem AFC, KW 3900-12000 kHz, MW 530-1605 kHz; zwei Teleskopantennen für KW und UKW; Drehspuleninstrument zur Sendereinstellung, Batteriekapazitätsanzeige und für Restzeit; mechanisch einstellbarer Timer. Anschlußbuchsen für ext. 6-Volt-Netzteil, Kopfhörer, Tonband und MPX-out.

  • Net weight (2.2 lb = 1 kg)
  • 0.8 kg / 1 lb 12.2 oz (1.762 lb)
  • Price in first year of sale
  • 398.00 DM
  • Mentioned in
  • - - Data from my own collection (Alles über die Sony Weltempfänger, R. Lichte)
  • Author
  • Model page created by Zenonas Langaitis. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum

Forum contributions about this model: Sony Corporation;: Newscaster ICF-7800

Threads: 2 | Posts: 5

I have recently acquired a Sony ICF-7800 in a so-so condition. It is working on all bands, despite some non identified issues on SW and MW bands where the symptoms are whistling around the tuned stations and loss of sensitivity (to be looked for at a later time).

The main issue is the speaker that shows a total foam ring degradation, unable to handle any level of bass. Treble works fine, though.

I have disassembled the radio to remove the major part of the damaged foam ring from the speaker, most of it freely laying around the enclosure.

Do you know of suitable speaker foam ring parts for this speaker? I found a few references in the Internet, but I wonder where these really are adequate.

 

 

Back cover removed to expose the speaker details:

  • SONY
  • 1-502-598-11
  • 1.4W 6.5 Ohm
  • 0837
  • JAPAN
  • J020

 

 

 

 

Jose Mesquita, 22.Jul.21

Weitere Posts (4) zu diesem Thema.

Hallo

Mein ICF 7800 fing mit der Zeit an zu knacken, später schaltete er sich von selbst ein obwohl

OFF Schalter auf OFF und Timer Schalter ebenfalls auf OFF in Mittelstellung.

Ich sah mir den Schaltplan an meine Vermutung Q4 Switching Transistor 2SA772.

Radio zerlegt der Transistor befindet sich auf dem Timer Board,Spannungen gemessen C 5,7V

E 5,7V B 5,5V eigentlich müsste er sperren laut Schaltplan.

Transistor ausgelötet ersetzt durch BC 327 Radio wieder in Ordnung.

Alten Transistor mit Transistorprüfgerät überprüft elektrisch in Ordnung seltsam?

Gruss

G. Härtl

Gerhard Härtl, 25.Oct.14

Weitere Posts (1) zu diesem Thema.