• Country
• People's Republic of China

• Manufacturer / Brand
• Unknown - CUSTOM BUILT: China

• Year
• 2000 ??

• Category
• Miscellaneous (Other, Various) - see notes

• Radiomuseum.org ID
• 304347

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Transceiver

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Storage and/or dry batteries / 18 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Underground Metal Detector - Unknown - CUSTOM BUILT: China

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 140 x 100 x 150 mm / 5.5 x 3.9 x 5.9 inch

• Notes

• Very Low Frequency (VLF) Pulse Induction (PI) Transmit/Receiver type; All Metal and Discriminator operation mode; the Receiver and the Transmit antenna coil are enclosed in a plastic 6.5 inches diameter waterproof probe plate at end of an aluminium stretch (variable lenght from 30.7 up to 42.1 inches); sensitivity 13 cm for an US 25 Cent coin; working frequency about 5 kHz; standby current 10 mA, maximum current 70 mA.

• Net weight (2.2 lb = 1 kg)
• 1.124 kg / 2 lb 7.6 oz (2.476 lb)

• Mentioned in
• -- Original prospect or advert

• Author
• Model page created by Emilio Focosi. See "Data change" for further contributors.

• Other Models

• Here you find 526 models, 503 with images and 29 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unknown - CUSTOM BUILT: China