CZECH AMATEUR RADIO STATION

 






Last update 21-7-2003. Copyright OK1RP & OK1-35506.

Models of Mizuho QRP Transceivers Available

Model Band Price
MX-3.5S 80M 25 Kč
MX-7S 40M 25 Kč
MX-14S 20M 50 Kč
MX-18S 17M 50 Kč
MX-21S 15M 50 Kč
MX-28S 10M 50 Kč
MX-6S 6M 50 Kč

Please note that each radio will take a maximum of two crystals at any one time.It is a simple task to change crystals as they just plug in the transceiver underneath the cover. ( no other adjustment needed).

 

 

 

GENERAL SPECIFICATIONS OF TRANSCEIVERS

Construction : Metal case throughout

Model

Freq. ranges [kHz]

Mode

MX-3.5S  3.500-4.000 LSB/CW
MX-7S 7.000-7.300 LSB/CW
MX-14S 14.000-14.350 USB/CW
MX-18S 18.068-18.168 USB/CW
MX-21S 21.000-21.450 USB/CW
MX-28S 28.000-28.600 USB/CW
MX-6S  50.000-52.000 SSB/CW
 
Semiconductors
  • 4 ICs
  • 13 Trs
  • 6 FETs
  • 37 Diodes
Power supply voltages
- Internal 8.4-9VDC
   * 6x AA drycells (When using drycells use supplied dummy battery)
    * 7x Nicads.
- External 9.5VDC (Do not put 12V directly into the rig unless using optional DC/DC converter or charging internal nicads !!!)

ower consumption
RX 70mA ( at no signal)  
TX 620mA (maximum)
Frequency stability
± 500Hz At power-up
± 100Hz at 25 deg. C after 30 Min.
Antenna impedance :  50 W
Dimensions :  2.6" x 1.5" x 5.6"
Weight :
(including Batt.)
 MX-3.5S : 645g
 all others : 590g

   

TRANSMITTER SPECIFICATIONS

Maximum power output :  2 Watts (1 watt MX-6S 6 meters)
Spurious radiation : -40 dB
Modulation :  Single sideband (suppressed carrier)
Carrier suppression :  40 db minimum
Crystal filter sideband suppression :  40 db minimum

Harmonic Levels :

2nd 3nd 4th 5th 6th 7th 8th 9th
-63dBc -59dBc -76dBc <-90dBc -82dBc -80dBc <-90dBc <-90dBc

Built in microphone, LED transmit indicator and mini CW key-button on top panel.