MKU 13 G3 28
Transverter
1269 ... 1298 MHz
The new design of our transverter for 1.3 GHz features better performance and many new functions.
Now, an external 10 MHz reference frequency can be connected to achieve highest frequency accuracy. This is necessary for EME, WSJT and Tropo DX. The frequency of 10 MHz can be supplied by a highly stable OCXO, a reference oscillator of a frequency counter, a rubidium frequency standard or a GPS controlled frequency source.
If a 10 MHz reference frequency is not available, the internal crystal oscillator of the transverter can be used. This crystal oscillator is frequency stabilized by our 40 °C precision crystal heater QH40A.
A bigger attenuator at the IF input port allows an input power of up to 5 watts. Great large signal performance is achieved by the use of a high-level ring mixer. Self-resettable polyfuses prevent damages of the transverter module, especially if it is used in a portable station. Of course, all the well-tried functions of the old transverter version are kept in the new design!
The small mechanical dimensions of the transverter, which is designed in SMD technology, allow the construction of a small portable station as well as a powerful home station.
Specifications | |
Type | MKU 13 G3 28 |
Frequency range (RF) | 1296 ... 1298 MHz |
Frequency range (IF) | 28 ... 30 MHz |
LO accuracy @ 18 °C | typ. +/- 2 ppm, max. +/- 3 ppm (without 10 MHz reference frequency) |
LO frequency stability (0 ... +40 °C) | typ. +/- 2 ppm, max. +/- 3 ppm (without 10 MHz reference frequency) |
Output power | typ. 2.5 W |
IF input power | max. 5 W, adjustable (0.5 ... 5 W) |
Noise figure @ 18 °C | max. 0.8 dB |
Receive gain | min. 20 dB, adjustable |
Supply voltage | +12 ... 14 V DC |
Current consumption | typ. 1 A (TX) |
OCXO in | 10 MHz / 2 ... 10 mW (sine or square wave) |
PTT voltage | +3 ... 14 V DC |
Coaxial connectors / impedance | SMA-female, 50 ohms |
Case | German silver, with heat sink |
Dimensions (mm) | 111 x 55 x 30 (without heat sink) |
Weight | typ. 320 g |
Block diagram
System overview
Features
New features of the transverter MKU 13 G3 28
- Additional input for 10 MHz reference frequency
- Internal stabilized oscillator with precision crystal heater (can be used instead of 10 MHz reference frequency)
- High Level Ringmixer with an IP3 of +25 dBm
- Higher output power
- Bigger attenuator at the IF input for input power up to 5 watts
- Fuses are self-resettable (polyfuses)
Well-tried functions and features - based on MKU 13 G2 28
- Super low noise converter in the receive path
- Transmit gain and receive gain separately adjustable
- Control output for additional amplifier stages or a coaxial relay
- PTT can be switched by voltage on the IF connector or by connecting the PTT pin to ground
- Detector output (DC voltage) for monitoring the output power
Applications
Options
- Professional: Transverter available in milled aluminium case
- Dimensions as PDF
Accessories
- As a 10 MHz frequency source we recommend the GPS-stabilized oscillator by James Miller, G3RUH or the 10 MHz GPS-Frequency Standard by ID Elektronik, DK2DB
- GPS stabilized 10 MHz oscillator (James Miller, G3RUH)
- 10 MHz GPS-Frequency Standard (ID Elektronik, DK2DB)
Interdigitalfilters
This transverter module required an external filter for image rejection.
Further information about supply and construction is included in these files:
References
- Specifications subject to change without notice -
