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March 2019

SDR interface for the FT-817

Follow the steps below to install the IFace card in the YAESU FT-817. Installation is really very easy.

As always we start from the block diagram and try to find information on where to get the first intermediate frequency signal. We use the first because it is not filtered, i.e. the band is still wide. The following images make it very clear where this point is located. The PTT may not be necessary, the TX and RX circuits are well separated.

The power supply can be taken from the test point TP1084.

At this point all that remains is to identify the points on the PCB where to take the signals: refer to the following images.

If you are convinced of the goodness of the proposal buy an IFace using the button below.

WARNING: Although the installation of IFace is not difficult, it is done at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side effects or anything else.

For more information do not exist to write to us.
Have fun!

SDR interface for FTDX1200

Follow the steps below to install the IFace card in the YAESU FTDX-1200. Installation is really very easy.

As always we start from the block diagram and try to find information on where to get the first intermediate frequency signal. We use the first because it is not filtered, i.e. the band is still wide. The following images make it very clear where this point is located. The PTT may not be necessary, the TX and RX circuits are well separated. The power supply can be taken from a point very close to the relais labeled RL1007.

At this point all that remains is to identify the points on the PCB where to take the signals: refer to the following images.

With the video below you can also view the instructions and listen to the explanations on how to install the IFace

If you are convinced of the goodness of the proposal buy an IFace using the button below.

WARNING: Although the installation of IFace is not difficult, it is done at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side effects or anything else.

For more information do not exist to write to us.
Have fun!

An SDR for IFace

Several of you have written us asking which SDR receiver to use in combination with your radio and our IFace buffer card (which you will find here described). The answer is simple: all are fine and at the bottom of the page you will find some links to buy them.
In the 1 minute video here below you can find the test with a common RTL-SDR.

The basic concept of using the IFace buffer card is that the “dirty work”, that is to limit extremely strong signals, even outside the amateur radio band, is delegated to the first reception stages of our RTX. In this way we can also use a cheap SDR receiver, which in practice has no filters, of those from a few tens of $. Then, honestly, what we’re talking about is not a real receiver, but a part of it, because it’s an A / D (digital analog) converter, a lot of the work is done by the software on the computer. Here the choice is wide, there are many and those that we used for the tests that you have seen and read are SDR #, SDR Console and HDSDR.

The only recommendation is that the A / D converter is able to work at the IF frequency of our radio. Ex, if the IF is at 8.83 MHz we will not be able to use one that works from 25 MHz to 1700 MHz.

For the tests, and therefore for the results we showed you, we used either of these “receivers”.

SDR interface for the FT-991

Follow the steps below to install the IFace card in the YAESU FT-991. Installation is really very easy.

As always we start from the block diagram and try to find information on where to get the first intermediate frequency signal. We use the first because it is not filtered, i.e. the band is still wide. The following images make it very clear where this point is located. The PTT may not be necessary, the TX and RX circuits are well separated. The power supply can be taken from the TP1034 near the J1018 connector.

At this point all that remains is to identify the points on the PCB where to take the signals: refer to the following images.

If you are convinced of the goodness of the proposal buy an IFace using the button below.

WARNING: Although the installation of IFace is not difficult, it is done at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side effects or anything else.

For more information do not exist to write to us.
Have fun!