E' uscito il nuovo prodotto di punta ICOM sul sito giapponese: IC-7851. Non sembra essere un prodotto completamente nuovo - il pannello frontale è quasi identica alla IC-7800, ma presenze può essere fuorviante.
General specification
Frequency range
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Mode
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LSB, USB, CW, RTTY, PSK31 / 63, AM, FM
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The number of memory
channels
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101 (split memory 99ch + scan edge 2ch)
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Antenna impedance
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50Ω (unbalanced)
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Antenna terminal
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HF / 50MHz band for M type 4 system, BNC type 2
system for reception
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Power-supply voltage
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85 ~ 265V AC
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Grounding scheme
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Minus ground
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Operating temperature
limit
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0 ℃ ~ + 50 ℃
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Frequency stability
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± 0.05ppm within (at the time of 0 ℃ ~ + 50 ℃ / 54MHz)
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Frequency resolution
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Minimum 1Hz
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Power consumption
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Receiving standby time of 120VA (TYP)
Reception at the maximum 130VA (TYP) Send at the maximum 800VA |
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External dimensions
(I except the projections) |
About 425 (W) × 149 (H) × 435 (D) mm
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Weight
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About 23.5kg
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Transmission unit
Transmission output
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SSB, CW, FM, RTTY, PSK31 / 63: 5W ~ 200W
AM: 5W ~ 50W |
Modulation scheme
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SSB: balanced modulation
AM: low-power modulation FM: phase modulation |
Spurious emission
intensity
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Harmonic:
More than 60dB (HF band) 70dB or more (50MHz band) Spurious area (I except the harmonic): More than 50dB (HF band) 70dB or more (50MHz band) Out-of-band region: More than 40dB (HF band) More than 60dB (50MHz band) |
Carrier suppression
ratio
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63dB or more
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Unnecessary sideband
suppression ratio
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70dB or more
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Microphone impedance
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600Ω
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TX variable range
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± 9.999kHz
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Receiving part
Receiving scheme
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Double superheterodyne system
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Intermediate frequency
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First: 64.455MHz (MAIN), 64.555MHz (SUB)
Second: 36kHz |
Receiver sensitivity
(TYP)
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SSB / CW / RTTY / PSK (BW = 2.4kHz) (when 10dB S /
N)
0.1MHz ~ 1.7999MHz: -6dBμ (preamplifier 1: When ON) 1.8MHz ~ 29.990MHz: -16dBμ (preamplifier 1: When ON) 50MHz ~ 54MHz: -18dBμ (preamplifier 2: When ON) AM (BW = 6kHz) (when 10dB S / N) 0.1MHz ~ 1.7999MHz: + 16dBμ (preamplifier 1: When ON) 1.8MHz ~ 29.990MHz: + 6dBμ (preamplifier 1: When ON) 50MHz ~ 54MHz: + 0dBμ (preamplifier 2: When ON) FM (BW = 15kHz) (when 12dB SINAD) 28MHz ~ 29.990MHz: -6dBμ (preamplifier 1: When ON) 50MHz ~ 54MHz: -10dBμ (preamplifier 2: When ON) |
Squelch sensitivity
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SSB / CW / AM / RTTY / PSK: + 15dBμ below
FM: 0dBμ below |
Selectivity (TYP)
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SSB (BW = 2.4kHz): 2.4kHz more / -3dB 3.6kHz or less
/ -60dB
CW / RTTY / PSK (BW = 500Hz): 500Hz or more / -3dB 700Hz or less / -60dB AM (BW = 6kHz): 6.0kHz more / -3dB 15kHz or less / -60dB FM (BW = 15kHz): 12kHz or more / -6dB 20kHz or less / -60dB |
Spurious interference
ratio
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70dB or more
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Low-frequency output
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More than 2.6W (8Ω load, when 10% distortion)
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Low-frequency load
impedance
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8Ω
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RIT variable range
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± 9.999kHz more
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Accessories
● rack mount handle
● SD card
● AC power cable
● spare fuse
● speaker plug other
● SD card
● AC power cable
● spare fuse
● speaker plug other
Good Dx de IK1XPK, Claudio
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