• Pays
• People's Republic of China

• Fabricant / Marque
• Tecsun 德生通用电器制造有限公司 Tecsun General Electric Manufacturing Co., Ltd; Dongguan (Guangdong, SC)

• Année
• 2014 ?

• Catégorie
• Boîte de construction (composants et manuel) ou instructions

• Radiomuseum.org ID
• 302481

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

• No. de transistors
• 3

• Semi-conducteurs
• S9018 S9018 S9018 TA7368 1N60 1N4148 1N4148 1N4148

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

• Gammes d'ondes
• PO uniquement

• Tension / type courant
• Piles sèches / AA: 2 x 1.5 Volt

• Haut-parleur
• HP dynamique à aimant permanent + bobine mobile / Ø 7 cm = 2.8 inch

• Puissance de sortie
• 0.12 W (max.)

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

• De Radiomuseum.org
• Modèle: 2P3 - Tecsun 德生通用电器制造有限公...

• Forme
• Portable, appareil de poche. Taille < 20cm

• Dimensions (LHP)
• 110 x 75 x 35 mm / 4.3 x 3 x 1.4 inch

• Remarques

• The original 2P3 diy kit radio was developed in the mid 1960's. This is the new 2014 2P3 diy kit radio, retaining the old style case but with updated chassis and components.

  The Chinese building guide is comprehensive and detailed, incuding a very detailed section on how to align the radio to get the maximum signal possible. There is a  publicly available English translation made by CRKITS covering the 2014.3 Ver. 4 "Green PCB" variant. That said, this is not an electronics beginner's kit..

  Main features

  • Frequency coverage: MW 530 - 1620 kHz
  • Sensitivity: < 1 mV/m
  • Maximum audio output: 120 mW
  • Quiescent current: 7 mA

  Some technical details

  The RF section is handled by three silicon transistors, the detection is handled by a germanium 1N60 diode, and the audio uses one CD7368 IC.

  Q1 is the RF amplifier/mixer/oscillator, and Q2 and Q3 supports the two IF stages where a 455 kHz ceramic filter helps improving the selectivity, besides the three canned RF transformers (one oscillator in red, one 1st IF in yellow, and one 3rd IF in black).

  The ferrite antenna uses three coil configuration to allow fine adjustment for maximum signal reception on both low and high RF frequencies.

  The detection circuit built around the 1N60 diode is shielded.

  The power supply lines are RC decoupled for a total of three Vcc lines, where the 3rd line at 1.7VDC used to bias the RF transistors is stabilized with three 1N4148 diodes in series.

  The three RF transistor collector Vcc lines (marked as A, B, C, in the diagram) comes in open circuit in the PCB to allow for current checking and test for build errors. These test points need to be short-circuited with solder in order to have a fully functional circuit.

   

• Prix de mise sur le marché
• 35.00 USD

• Auteur
• Modèle crée par Didier Tholomier. Voir les propositions de modification pour les contributeurs supplémentaires.

• D'autres Modèles

• Vous pourrez trouver sous ce lien 35 modèles d'appareils, 34 avec des images et 21 avec des schémas.
  Tous les appareils de Tecsun 德生通用电器制造有限公司 Tecsun General Electric Manufacturing Co., Ltd; Dongguan (Guangdong, SC)