222/28 MHZ TRANSVERTER BOARD

*** TO BUY WITH CONFIDENCE, YOU ARE GETTING PAYPAL PROTECTION ! *** 

55 USD SHIPPED ONLY !!

With this transverter board you can operate on the 1.25 meter band using any type of the HF radio that has the 10 meter band. It would work the whole 1.25m band at 222 to 225 MHz if your base radio has the 28 to 31 MHz band. Most HF radios have 28 to 30 MHz band so in this case it means you would have the 222 to 224 MHz band. It works any modes such SSB, CW or FM if its available in your radio.

Click on this pic to get it large

Applying only 1 to 50 mW (0.05 W Max.) to this transverter on 10m band you get about 6 ... 8 W output power on the 1.25m band. You can change input power using RV1 pot on the board. There is no antenna relay required.

We are offering completely built and tested in our lab board. To get it worked with your radio perfectly you have to do some soldering works with the cables, wires and connectors.

In case you're going to connect this transverter to the radio that has 100 Watts output power then additionally you have to build or buy the attenuator or some sort of interface board between your radio and this transverter board.

We are including a circuit of a simple attenuator board which contains a few resistors and relays only. It can be easily built by any person with a basic knowledge in electronics. Also there you find a circuit of a possible connection of this transverter board to your HF radio.

OR YOU CAN BUY THE ASSEMBLED AND TESTED ATTENUATOR / TRANSVERTER INTERFACE BOARD THERE

Technical specifications

RF range - 222 ... 225 MHz
IF range - 28 ... 31 MHz
IF input power - 1 ... 100 mW (0.1 W max.) or 0 ... 20 dBm
LO frequency - 194 MHz
LO frequency stability - +/- 3 ppm
Output power - 6 ... 8 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 - RD15HVF1
RX Input transistor - BF998
Dimensions (mm) - 80 x 45

 

Download a copy of the description I am including with the board there

The circuit of the simple attenuator board is there

I am testing the transveter boards before putting them in a shipping box.
If you were not satisfied with the transverter then you ship it back and I refund your money.

 

We take PayPal and you can pay pushing "Buy Now" button.

Click button below and buy the TRANSVERTER BOARD for 45 USD + 10 USD shipping

OR YOU CAN GET TOGETHER

TRANSVERTER BOARD + ATTENUATOR BOARD for 55 USD + 10 USD shipping

222/28 MHz TRANSVERTER BOARD - $55

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222/28 MHz TRANSVERTER BOARD

PLUS

ATTENUATOR BOARD - $65

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