70/28 mhz Transverter Board.
 






This is the 70/28 Mhz or 4/10 meters band transverter board.

We designed and built this transverter board with a purpose to bring an affordable high performance product on the ham radio market. In the past year we sold a lot of them. Just to check my feedbacks.

With this transverter board you can operate on the 4 meter band using any type of the HF radio that has the 10 meter band. It would work the whole 4m band at 70 to 72 mhz if your base radio has the 28 to 30 mhz band. It works any modes such SSB, CW or FM if its available in your radio.

There is a video on YouTube shows RX performance of this board.


What can you do with this tharnsverter board ?
  1. Make your HF radio works on 4 meters band.
  2. Convert your Flex Radio or other SDR Radio into all mode 4 meters transceiver with a Spectrum Waterfall.
  3. Use this board as the RX converter with SDR or HF receiver and get 4 meters band there.
We are offering the completely built and tested in our lab board that comes with the english description which contains the circuit of the transverter and the circuit of the simple attenuator board.

Technical specifications

RF range  -  70 ... 72 MHz
IF range  -  28 ... 30 MHz
IF input power  -  1 ... 100 mW / 0 ... 20 dBm (0.1 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. 2 A (TX)
TX Output transistor  -  RD16HHF1
RX Input transistor  -  BF998
Dimensions (mm)  -  80 x 45

If you're going to connect this transverter board to the radio that has 100 Watts output power the some sort of attenuator between your radio and this transverter board is necessary. We designed a simple attenuator board which contains a few resistors and couple relays only. You can easily build it yourself.

Or you can buy the built and tested ATTENUATOR BOARD there

In case you were going to connect this transverter board to the FLEX Radio then NO attenuator board is required.

In respect and to the favour of our buyers we put the TRANSVERTER BOARD and ATTENUATOR BOARD together in a ONE SALE as just the boards or as the KIT with a BOX and other parts.

To buy the 70 MHZ TRANSVERTER + ATTENUATOR BOARDS together there

This sale is not including the attenuator board, heatsink, power and RF connectors, wires or cables. You are getting what you see on the pics.


Also we are offering the ASSEMBLED TRANSVERTER IN BOX or the KIT.

70/28 MHZ ASSEMBLED TRANSVERTER IN BOX there

70/28 MHZ TRANSVERTER + ATT. BOARDS + ENCLOSURE KIT there

The OTHER BANDS TRANSVERTERS you can find there


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.


 

We ship Worldwide from the Ukraine by Airmail with insurance and provide a tracking number that can be easily tracked through the Internet there.

After the package left Ukraine you can track it on a tracking system of the Postal service of your country. The shipping is safe and fast. Usually it takes up to 20 days but it can be more or less delivery time depending on how quickly the package goes through Customs.

 




Feedback From Buyer Date/time
Positive feedback rating An excellent unit that works very well d*********1 ( 18 Yellow star ) 2016-11-30
20:38:28
Positive feedback rating Well made good quality PCB i********************r ( 389 Turquoise star ) 2016-11-08
13:23:48
Positive feedback rating An ingeneous design with excellent construction. Many thanks. g***n ( 208 Turquoise star ) 2016-10-03
15:07:40
Positive feedback rating thank you for fast delivery 9***p ( 154 Turquoise star ) 2016-09-29
06:51:16
Positive feedback rating Все,как всегда,быстро,четко и отлично работает. b****4 ( 549 Purple star ) 2016-09-28
08:23:08
Positive feedback rating A surprisingly quick delivery and item as described, with circuit drawing. u********e ( 79 Blue star ) 2016-09-02
17:06:45
Positive feedback rating arrived yesterday ft897 on 4mtrs now many thanks p*************9 ( 464 Turquoise star ) 2016-08-18
10:23:44
Positive feedback rating GREAT SELLER z******g ( 80 Blue star ) 2016-05-26
05:20:07
Positive feedback rating Thanks e*******a ( 140 Turquoise star ) 2016-05-09
05:13:23
Positive feedback rating as usual very fast shipment and item as expected, tnx! i**********8 ( 224 Turquoise star ) 2016-03-17
16:27:43