In the world of ham radio, the ability to see signals in real-time on a pan adapter display can greatly enhance the overall experience. However, not all transceivers are equipped with an IF output to support this feature. This is where the KD2C HI-Z IF Tap Board comes in handy.
HI-Z IF Tap Board
The HI-Z IF Tap Board is designed to provide an IF output for solid-state transceivers that do not have one. The tap board is specifically designed to present a high impedance to the IF circuit, minimizing loading on the signal path. This allows for a clean and accurate signal to be passed through to the pan adapter display.
The board itself is quite small, measuring around an inch by an inch and a half, making it easy to install in tight spaces. The installation process is straightforward, requiring only three connections IF in, IF out, and power. The board comes with instructions showing the connection points for your specific rig.
There are different versions of the board available, depending on the IF frequency of your transceiver. So be sure to check the compatibility before purchasing.
Installation
I recently upgraded my FT-736r by installing a panadapter. To do this, I removed the covers and located the RX unit. After removing the shielding, I carefully drilled a hole for the SMA chassis mount on the back of the 736r. I made sure to clean out any metal debris with a vacuum before mounting the SMA connector.
To connect to the IF Input, I removed the RX unit and soldered a wire to the D07 Diode anode. After reinstalling the RX unit, I connected the power wire to Pin 2 of the J10 connector. Then soldered the IF output to the SMA Connector. Using the supplied double-sided tape, I set the IF Tap Board in place. Ground was provided through the SMA cable, and I kept the IF input wire as short as possible.
Once I reassembled the radio, I connected the IF output to an SDRPlay RSP1A. In SDRUno, I went to settings, ORIG, set the IF Frequency, and clicked enable. Now using the HI-Z IF Tap Board, my FT-736r has a reliable panadapter.