• Country
• United States of America (USA)

• Manufacturer / Brand
• General Electric Co. (GE); Bridgeport CT, Syracuse NY

• Year
• 1964–1966

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 269705

• • Brand: Musaphonic

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

• Number of Transistors
• 17

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 455/10700 kHz; 3 AF stage(s)

• Wave bands
• Broadcast, (BC) Long Wave (LW), 2 x SW and FM or UHF.

• Power type and voltage
• Batteries / addl. power jack / Either batteries: "D" 6 x 1.5 or DC Power Adapter: 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: 17 Transistor World Monitor P-990B - General Electric Co. GE;

• Shape
• Portable set > 8 inch (also usable without mains)

• Notes

• The General Electric P-990B is a battery/DC Power Adapter operated portable 17 transistor BC, LW, 2x SW and FM receiver.  Has fine tuning control, two telescopic antenna's and a push-pull output stage. Has earphone jack that disconnects the speaker for private listening. Also has provisions for connecting an external FM antenna and an external SW antenna.

  Band Frequency Ranges are as follows:
  LW Band.........................170 - 400kHz
  BC Band.........................540 - 1620kHz
  SW Band #1...................1.8 - 5.1MHz
  SW Band #2...................6.0 - 18MHz
  FM Band........................88 - 108MHz

  The P-990 was available in 3 different versions:

  Model	Differences
  P-990A	-
  P-990B	Different TR7-TR10 transistors, deleted R9, R32, R45, R50 resistors
  P-990C	Differences not known

  The SAMS TSM-60 calls out model P-990A only. However the SAMS index for models P-990B and P-990C refer to this same TSM-60 reference and so therefore is applicable for this model also.

• Literature/Schematics (1)
• General Electric Service Notes (General Electric Service Guide Volume V 1963 to 1965 Pages 102, 103)

• Literature/Schematics (2)
• General Electric Service Notes (General Electric Service Guide Volume VII 1967 to 1969 Pages 144-146)

• Literature/Schematics (3)
• Photofact TSM Transistor Radio Series SAMS (TSM-60, October 1965, page 64-76)

• Author
• Model page created by John Kusching. See "Data change" for further contributors.

• Other Models

• Here you find 2916 models, 2139 with images and 2042 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from General Electric Co. (GE); Bridgeport CT, Syracuse NY