Last update 21-7-2003. Copyright OK1RP & OK1-35506.
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RECEIVER SPECIFICATIONS
| Receiver method
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Single conversion superhet
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| Sensitivity
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S/N 15db at 0.5µV input : Attenuator in 0.22µV
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| Selectivity
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-6dB 2.39kHz : -60dB 4.55kHz |
| Blocking : |
Measured as increase over 12dB SINAD level of interfering signal with an unmodulated carrier, causing 6dB degradation in 12dB |
SINAD on-channel signal :
Separation Rejection
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| ± 10kHz 72.5dB |
| ± 100khZ 76.0dB |
| ± 1Mhz 91dB |
| ± 10MHz 93.5dB |
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IF and Image Rejection : Increase in level of signals at the first
i.f. image frequency, and at the i.f. it self (11.2735), over level of on-channel signal to give identical 12db SINAD
signals:
Image <100dB and IF 73dB
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| 3rd Order Intermodulation Rejection: increase over12dB SINAD level
of two interfering signals giving identical 12dB SINAD on-channel 3rd order intermodulation
Product, 10kHz signal spacing :
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| Attenuator Out : |
53.0dB |
| Attenuator In : |
60.5dB |
| Intermediate frequency : |
11.2735 MHz |
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RX Includes :
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Crystal filter, AGC, noise blanker, built in S-meter |
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LOCAL OSCILLATOR |
| Oscillation method : |
Variable crystal |
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CRYSTAL SPECIFICATIONS
(for
MX-28S)
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| Funamental mode |
| 60 pF internal capacitance |
| 0.0010 % tolerance |
| HC-25 case |
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CONTROLS
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Top panel::
Rit. , AF volume, Tuning, Noise blanker, Crystal switch, S-meter, External Speaker and Microphone jack, mini CW key-button, BNC antenna
jack.
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| Bottom panel :
Power supply in, Charging switch, RF Attenuator, SSB/CW mode switch, Jack for external key.
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| Optional Mizuho
Accessories :
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Telescopic whip antenna AN-..series, CW side-tone unit CW-2S, 10 Watt linear PL-.. series
amplifier, AC power supply, DC-DC converter PM-1, Carrying case, speaker mike, Mobile rack.
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