70/28 MHz Transverter Board

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 72 MHz if your base radio has the 28 to 30 MHz band (70.000 at 28.000). You can works any modes such SSB, CW or FM if your radio has them.

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 ... 72 MHz
          •  IF range  -  28 ... 30 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 ... 15 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  -  RD16HVF1
          •  RX Input transistor  -  BF998
          •  Dimensions (mm) - 80 x 45
To get the transverter worked you have to do some soldering works with a cables, wires and connectors. Probably some instruments would be required.
Does not include the interface module, heatsink, power and RF connectors, wires or cables.

If you were not satisfied with the transverter board then you ship it back and we refund your money.

We guarantee delivery of your package without paying additional import duties or Customs taxes.


Shipping

We ship Worldwide by Airmail with trucking.

Typical shipping time:

EUROPE 2 weeks

USA, Canada 3 weeks

Africa, South America, Asia, Australia 4-6 weeks.

Note!

Please understand that the package maybe delayed due to reasons outside of our control, like weather, holidays or shipping errors. We appreciate your patience but if you have not received package in the time stated above, please feel free to contact us through eBay message. We will try our best to solve the problem for you.