70/28 MHz Transverter Board with High Dynamic range.
This transverter has been designed and built by UR3LMZ Ukrainian radio engineer. With this transverter you can operate on the 70 mhz band using any type of the HF radio at 28 mhz. It would work the whole 4m band at 70 to 74 MHz if your base radio has the 28 to 32 MHz band (70.000 at 28.000). You can works any modes such SSB, CW or FM if your radio has them.
It is specially developed for severe conditions of reception – contests, DXing, the neighboring powerful broadcasting and amateur stations. The mixer is made on special HI-frequency ADE chip with whopping dynamic range IP3 + 17dBm typ.
We are offering completely built and tested in UR3LMZ lab board that comes with the English description which contains the circuit diagram of this transverter and circuit of a simple attenuator board.
This sale includes the completely built, tuned and tested transverter board with its schematic diagram and a diagram of a possible connection of this transverter board to your HF radio.
Technical specifications
| RF range | 70 … 74 MHz |
| IF range | 28 … 32 MHz |
| IF input power | 1 … 50 mW / 0 … 17 dBm (0.05 W max.) |
| LO frequency | 42 MHz |
| LO frequency stability | +/- 3 ppm |
| Output power | 10 W |
| RX gain | typ. 20 dB |
| Noise figure | typ. 1.0 dB |
| Image rejection | typ. 70 dB |
| PTT control | Contact closure to ground |
| Supply voltage | +13.8 V DC (+12 … 14 V DC) |
| Current consumption | typ. 1.3 A (TX) |
| TX Output transistor | RD16HHF1 |
| Dynamic range IP3 +17dBm typ | |
| Dimensions (mm) | 84 x 47 (3.3 х 1.85 in) |
If you were not satisfied with the transverter board then you ship it back and we refund your money.
