Short Wave Dual Conversion R-9710
Tecsun 德生通用电器制造有限公司 Tecsun General Electric Manufacturing Co., Ltd; Dongguan (Guangdong, SC)
- Land
- Volksrepublik China
- Hersteller / Marke
- Tecsun 德生通用电器制造有限公司 Tecsun General Electric Manufacturing Co., Ltd; Dongguan (Guangdong, SC)
- Jahr
- 2002 ?
- Kategorie
- Rundfunkempfänger (Radio - oder Tuner nach WW2)
- Radiomuseum.org ID
- 327762
New in the box bought in 2021 from China.
New in the box bought in 2021 from China.
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- Anzahl Transistoren
- 8
- Hauptprinzip
- Super mit Mehrfachmischung
- Wellenbereiche
- Mittelwellen, mehr als 2 KW-Bänder plus UKW.
- Betriebsart / Volt
- Batterien / Niedervolt Stromversorgung (power jack) / AA: 2 x 1.5 / DC 3 Volt
- Lautsprecher
- Dynamischer LS, keine Erregerspule (permanentdynamisch) / Ø 4.5 cm = 1.8 inch
- Belastbarkeit / Leistung
- 0.15 W (Qualität unbekannt)
- Material
- Plastikgehäuse (nicht Bakelit), Thermoplast
- von Radiomuseum.org
- Modell: Short Wave Dual Conversion R-9710 - Tecsun 德生通用电器制造有限公...
- Form
- Kleines Reisegerät oder «Taschengerät» < 20 cm.
- Abmessungen (BHT)
- 118 x 75 x 29 mm / 4.6 x 3 x 1.1 inch
- Bemerkung
-
The Tecsun R-9710 is a small portable analog radio offering FM stereo (when listening with earphones), MW (AM), and eight SW bands featuring dual conversion where the first discrete local oscillator uses eight crystals for improved stability, one per SW band.
Frequency coverage
- FM: 87 - 108 MHz (IF: 10.7 MHz)
- MW: 525 - 1710 kHz (IF: 455 kHz)
- SW: 5.95 - 21.85 MHz (1st IF: 10.7 MHz; 2nd IF: 455 kHz)
- SW1: 5.90 - 6.20 MHz
- SW2: 7.10 - 7.30 MHz
- SW3: 9.50 - 9.90 MHz
- SW4: 11.65 - 12.05 MHz
- SW5: 13.60 - 13.80 MHz
- SW6: 15.10 - 15.60 MHz
- SW7: 17.55 - 17.90 MHz
- SW8: 21.45 - 21.85 MHz
Sensitivity
- FM: <10 uV
- AM: <1 mV/m
- SW: <30 uV
Selectivity: >20dB
Included accessories
- Stereo earphones
- Carrying pouch
- External FM/SW soft antenna (13 ft)
- English manual
Some technical details
The design is built around the TA2111F AM/FM radio tuner IC1 and the CXA1622M dual channel audio power amp IC2.
The MW band uses a large antenna ferrite bar to improve the reception, as it is connected to the TA2111F AM RF input without front-end amplification.
The FM band uses a 2SC9014 Si transistor VT8 and a LC band pass filter L1/C4 as RF front-end to improve the reception.
The SW bands uses a 2SK544 FET VT2 as RF front-end/mixer where the 1st local oscillator is handled by a 2SC9018 VT5 and 8 x Crystals, one per band. The 1st IF runs at 10.7MHz and is passed thru T1 transformer to be amplified by a 2SC9018 VT1 and then passed to the IC1 via CF3 10.7 MHz ceramic filter.
The radio can operate from a external 3V DC power adapter using a 3.5mm jack, where the positive pole is on the outside and negative pole on the center. To protect the internal components against inadequate or malfunctioning power adapters, one 1N4737 7.5V 1 Watt Zenner diode VD6 is configured in parallel with the Vcc line.
- Originalpreis
- 24.00 USD
- Autor
- Modellseite von Didier Tholomier angelegt. Siehe bei "Änderungsvorschlag" für weitere Mitarbeit.
- Weitere Modelle
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Hier finden Sie 35 Modelle, davon 34 mit Bildern und 21 mit Schaltbildern.
Alle gelisteten Radios usw. von Tecsun 德生通用电器制造有限公司 Tecsun General Electric Manufacturing Co., Ltd; Dongguan (Guangdong, SC)
Sammlungen
Das Modell Short Wave Dual Conversion befindet sich in den Sammlungen folgender Mitglieder.
Forumsbeiträge zum Modell: Tecsun 德生通用电器...: Short Wave Dual Conversion R-9710
Threads: 1 | Posts: 1
In my Tecsun R-9710 with PCB Rev. R-9710V13 with production date of 2014.10.20, the indicated integrated circuits in the schematic diagram have been replaced with Chinese equivalents, as follows:
| Component | Original schematic diagram | R-9710V13 2014.10.20 production |
| IC1 | Toshiba TA2111F | Silan SA2111CB |
| IC2 | Sony CXA1622M | Huajing CD1622CB |
Jose Mesquita, 04.Nov.21