Linear-Transverter

If you want to get serious with weak-signal DX or contesting on VHF, you have few other options than using a transverter with a HF rig as a driver. The VHF/UHF allmode radios of former times have vanished from the market due to lack of demand, the current combination HF/VHF radios are fantastic allrounders but are usually not up to par with the highest performance values of pure VHF radios.

The transverters offered on this page can be used with nearly any HF transceiver. This gives the user the liberty to design his or her station according to individual demands and budget. Of course modern SDR transceivers are exceptionally well suitable for transverter operation, for example because you can watch the entire DX segment of the band at a glance.

ZST-200 & LT-200 VHF Transverter Nuovo

VHF Transverter ZST-200 VHF Transverter ZST-200

The ZST-200 (LT-200) device is a transverter for the 2m VHF band. The IF band is 10 28 to 30 MHz which allows the use of practically any all band HF transceiver. The ZST-200 (LT-200) works as a linear transverter, it can be used with any mode, regardless if you want to do FM, SSB, CW or digimodes. The quality of a transverter is measured - among others - on the frequency stability, on the large signal handling capabilities and the low generation of spurious signals (inearity). In this regard both transverters show best values as can be seen in the data sheets. A high transmit power was not a design goal, because most serious DXers and contesters use external power amplifiers anyway. The high frequency stability of ± 0.05 ppm is achieved by using a temperature controlled crystal oscillator (TCXO).

Hooking up the ZST-200 (LT-200) to any HF transceiver is very simple, you just need a PTT keying line besides the HF cable. To maintain the correct keying sequence the PTT is keyed at the transverter, for example with a foot switch. A more complex sequencer (like the DCW-2004) would be required when using a pre-amp or a power amplifier. The transverters can also be used with transceivers which have separate TX and RX branches for split or full duplex operations. The maximum transmit power is 25W, the power supply is done over a 13.8V supply at max. 5A current consumption. A DC cable is included.

The difference between the two models ZST-200 and LT-200 is the maximum allowed input power to the transverter. The ZST-200 accepts 1 to 5W transmit power at it's input, the LT-200 only 0.1 to 100 mW. Therefore the LT-200 can only be used with HF Transceivers which offer a special transverter out put (many do). The benefit of this approach is a much cleaner transmit signal, because you eliminate the power amplifier of the driving HF rig. Otherwise the two transverter as identical.

ZST-200 rear ZST-200 rear
Dati tecnici ZST-200 & LT-200 VHF Transverter
ZST-200 LT-200
General Data
Tensione di funzionamento 12 – 14 V
Consumo mass. di corrente 5 A
Misura 234 x 170 x 60 mm
Peso 2.2 kg
Stabilità frequenze ± 0.5 ppm
Connettore IF 10m N boccola
Connettore Antenna N ##buchse
Down Converter
Gamma di frequenze VHF 144 – 146 MHz
Gamma di frequenze ZF 28 – 30 MHz
Noise Figure 3.2 dB
16 dB
Rx IP3 Uscita 30 dBm
Rx IP3 Ingresso 14 dBm
Image freq. rejection 90 dB
Rx Ingresso 1.4:1
Up Converter
Gamma di frequenze VHF 144 – 146 MHz
Gamma di frequenze ZF 28 – 30 MHz
Potenza in entrata 1 – 5 0.001 – 0.1 W
Amplificazione 20 dB
Potenza mass. (uscita) 25 W
IM3 Uscita 40 (@ 20W) dB
Harmonics Suppression 60 dB
Image freq. rejection 100 dB

  • Included in the shipment is:
  • ZST-200 or LT-200 VHF Transverter
  • DC Cable
  • Semi-Rigid connector SMA
  • CD-ROM with PDF manual
Ordine No.
ZST-200 ZST-200 VHF Transverter 25W, High Input Nuovo Non in magazzino, verrà ordinato solo su richiesta, tempi di consegna c. 7 giorni.
LT-200 ZST-200 VHF Transverter 25W, Low Input 1199.00 € Ordina Nuovo Non in magazzino, verrà ordinato solo su richiesta, tempi di consegna c. 5 giorni.
Info sui costi di spedizione
Downlaod: ZST-200 Operating manual english (PDF, EN, 2MB)
Download: ZST-200 Leaflet english (PDF, EN, 50 KB)

Downlaod: LT-200 Operating manual english (PDF, EN, 1.4MB)
Download: LT-200 Leaflet english (PDF, EN, 50 KB)
ZST-200 Station ZST-200 Station

Accessoires pour VHF/UHF Transverter

Ordine No.
ZS-1 SDR-Transceiver as driver 1499.00 € Ordina Non in magazzino, verrà ordinato solo su richiesta, tempi di consegna c. 7 giorni.
40075.15 Cinch cable for PTT 150cm 1.40 € Ordina In magazzino, spedizione in 1 o 2 giorni.
26132 DCW-2004 Sequencer 249.00 € Ordina In magazzino, spedizione in 1 o 2 giorni.
Info sui costi di spedizione