MKU 432 G2 - Transvertermodul
MKU 432 G2 - Transvertermodul MKU 432 G2 Blockdiagramm

MKU 432 G2 - Transverter module

432 ... 434 MHz

Combinations of HF transceivers and transverters provide high input sensitivity, good large signal performance, excellent phase noise values and low intermodulation distortion. Usually, the performance is much better than that of modern VHF transceivers. The high performance transverter module MKU 432 G2 is based on several decades of development and production of transverters. Its outstanding technical data makes it usable for many applications.
RF range432 ... 434 MHz
IF range28 ... 30 MHz
IF input power2 ... 50 mW / 60 ... 2000 µW switchable
LO accuracy @ 18 °Ctyp. +/- 2 ppm, max. +/- 3 ppm
LO frequency stability (0 ... +40 °C)typ. +/- 2 ppm, max. +/- 3 ppm
Output powermin. 70 mW
IM3 of output signalmax. 30 dBc @ 50 mW PEP
Spurious rejectionmin. 60 dB
Harmonic rejectiontyp. 25 dB
RX gaintyp. 25 dB
Noise figure @ 18 °Ctyp. 1.4 dB
RX output IP3typ. +23 dBm
PTT control+12 V DC for TX
Supply voltage+13.8 V DC (+12 ... 14 V DC)
Current consumptiontyp. 370 mA
Dimensions (mm)155 x 55 x 30
IF connectors / impedanceSMA-female, 50 ohms (sep. / com. switchable)
RF connectors / impedanceSMA-female, 50 ohms (separate RX/TX connectors)
DC-supply and control connectorFeed-through capacitor with solder pin
Weight200 g (typ.)
Technically skilled customers can set up their own 432 MHz transverter system with the transverter module and one of Kuhne electronic's power amplifier MKU PA 70CM-60W HY. The transverter module MKU 432 G2 will work with most HF transceivers, which have a transverter output port. Due to switchable input power range and connector configuration, the module is very flexible.


A temperature-compensated low noise butler oscillator generates the 101 MHz LO signal. A thermostat crystal with a 40 °C precision crystal heater is used. The phase noise of the multiplied oscillator signal with a frequency of 404 MHz is -140 dBc/Hz @ 10 kHz. This value is better than that of the HF transceivers. The oscillator output power is more than 50 mW.


In the receiver frontend there is only one super low noise stage with a noise figure (NF) of 0.8 dB and an output IP3 of +28 dBm. The frontend is followed by a helical band pass filter and a matching network. A high level schottky diode ring mixer converts the signal to the intermediate frequency (IF) at 28…30 MHz.


In the transmit path of the transverter a second high level ring mixer with an adjustable attenuator is used. The IF input power is adjustable between -12 … +17 dBm (0.06 … 50 mW). For further power adjustments the HF transceiver can be used. At the mixer output there is a matching network and a helical band pass filter. It is followed by an MMIC amplifier stage and a second helical band pass filter. The final output driver amplifier is able to generate 70 mW output power.
  • Low noise converter with excellent large-signal performance
  • There are two separate IF connectors. They can be switched to one common IF connector.
  • Switchable IF input power range
  • Phase noise of the oscillator -140 dBc/Hz @ 10 kHz
  • Internal temperature stabilized crystal oscillator with QH 40 A