Radio Review: Kirisun S780 Digital HT

I was able to get my hands one on of these radios and test it for a short time.  The radio has a very kirisunS780solid build, and a large color screen.  From first glance it almost looks like a cell phone with an antenna on top of it.  I keyed a couple of repeaters with it and got some good reports from other operators.

What I learned about the radio, which I didn’t know before my tests:

The standard this radio is using is the same as dPMR / DMR Tier 1, FDMA. It will NOT talk with DMR Tier 2 radios (TDMA, 2 time slots).  So no DMR 🙁  This is disappointing since Kirisun is on the DMR’s Associations preferred manufacturer’s list, which lists those companies who have build radios that adhere to the globally recognized DMR standard.  Here is a list of those companies.

For a monoband HT radio, that isn’t capable of DMR transmission, this radio isn’t anything special, really.  If you have a need for a Tier 1 DMR radio, it would probably be great.  But since it isn’t compatible with the NA DMR Standard, you can probably do better with other radios.

Technical parameters
S780U
General Specifications
Frequency
400—470MHz
Number of channels
256
Channel spacing
12.5kHz
Operating Temperature
-25℃~+55℃
Antenna Impedance
50Ω
Microphone impedance
2.2kΩ
Frequency Stability
±2.5ppm
Battery (standard configuration)
Model: KB-760, lithium battery
DC 7.5V ± 20% 1500mAh
Volume (length × width × thickness)
116 mm x54 mm x30 mm
Weight
136 g (main unit only) / 240 g (with battery and antenna host)
Receiving part
Sensitivity
≤-121dBm
Adjacent Channel Selectivity
≥60
Intermodulation Immunity
≥60dB
Spurious response
≥60dB
Audio output power
≥ 1000mW (distortion is less than 5%, 16Ω load)
Audio response
Analog: +2 / -6 dB
Transmitting section
RF Power
4W (High) / 1W (low)
Modulation
Digital: 4FSK Analog: 11KΦF3E
Clutter and harmonic
≤-70dBm
SNR
Analog:> 35 dB
Audio Distortion (300-3000Hz)
≤5%
Modulation limit
Digital: ± 2.5kHz
Modulation characteristics
Analog: +2 / -6 dB

2 Responses to “Radio Review: Kirisun S780 Digital HT”

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  1. Andrew NJ2AC says:

    Good to know this radio doesn’t do the TDMA. I was thinking about getting one and that just knocks it off the list.

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