segunda-feira, 19 de setembro de 2016

Medidor ESR

Este dispositivo faz o teste de: indutores, diodos, capacitores, resistores, leds, transistores, scrs, triacs, funciona com uma bateria de 9v. Com o toque de um botão, este aparelho testa o componente e mostra no display suas referências elétricas.

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domingo, 18 de setembro de 2016

Especificações Kenwood TM-271


 Download manual de serviço TM271

Kenwood logo TM-271A Specifications


 GENERAL
Antenna Impedance 50 ohms
Current Drain Receive Less than 1 A
Current Drain Transmit Less than 13 A
Dimensions (W x H x D) 6.33 x 1.69 x 6.65 in. (161 x 43 x 169 mm)
Weight (approx.) 2.6 lbs. (1.2 kg)
Frequency Range TX: 144 - 148 MHz
RX: 136 - 174
Ground Negative
Microphone Impedance 600 ohms
Frequency Tolerance ± 2.5 PPM -20°C to 60°C
Mode F3E (FM)
Operating Temperature Range -20°C to 60°C
Power Requirement 13.8V DC (±15%)
 RECEIVER
Audio Output Power More than 2W (8 ohms, 5% distortion)
Circuitry Double conversion superheterodyne
Intermediate Frequency 1st IF 49.95 MHz
Intermediate Frequency 2nd IF 450 kHz
Selectivity -6 dB More than 12 kHz
Selectivity -60 dB Less than 30 kHz
Sensitivity (12dB SINAD) Less than 0.18µV
Squelch Sensitivity Less than 0.10µV
 TRANSMITTER
Frequency Tolerance Within ±10 ppm
Maximum Frequency Deviation ±5 kHz
Modulation Reactance modulation
Modulation Distortion Less than 3% (300 Hz ~ 3 kHz)
RF Output Power HI 60 W
RF Output Power LO 25 W
Specifications may be changed without notice.