70/21-28 MHz Transverter Board with High Dynamic Range, high frequency stability and extended band.

Up for sale UR3LMZ transverter with highly stable frequency synthesizer. This allowed us to obtain a long-term stability of 0.2 ppm and the operating range of the transverter 70 - 74 MHz  with your HF radio frequency 21 - 25 or 28 - 32 MHz. This model has 2 LO frequencies that can be easily switched using jumpers on the transverter board - 42 and 49 MHz. This allows you to work of 70 - 74 MHz. High frequency stability allows you to work in FM, SSB, CW and even digital modes FT8 JT65 and etc.

This transverter board 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  -  21 ... 25 MHz or 28 ... 32 MHz (switchable)
        •  IF input power  - 1 ... 3 mW / 0 ... 5 dBm (10mW max)
        •  LO frequency  -  42 or 49 MHz (switchable)
        •  LO frequency stability  -  +/- 0.2 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. 2 A (TX)
        •  TX Output transistor  -  RD16HHF1
        •  RX Input chip - ADE
        •  Dynamic range IP3 + 17dBm typ.
        •  Dimensions (mm) - 80 x 80
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.