Installing the IFace inside the FT-857D

These are the instructions to install the IFace interface inside of the Yaesu FT-857D. The installation is very easy.

The FT-857D, as well as other radios, has a fairly complex configuration and uses different intermediate frequencies. We are interested in the first, the “wide band” one, the first one of the main band pass filter (the roofing filter so to speak). The one described here is therefore the sequence of operations to be performed to obtain a bandwidth sufficient to make a panoramic receiver around the selected IF frequency. The following image shows the point where the IF signal will be taken.

The PTT control is not required because different paths are used for the TX and the RX signals.

Let’s start by analyzing the wiring diagram. We have to find the first mixer and where to take the power supply. From the following images everything will appear clear.

At this point we have to locate the points where we connect the electric cables to the IFace. The following images show where to take the various signals.

The output signal cable can simply through one of the ventilation holes as depicted here below.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

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

Installing the IFace inside the IC-7410

These are the instructions to install the IFace interface inside of the Icom IC-7410. The installation is very easy.

The IC-7410, as well as other radios, has a fairly complex configuration and uses different intermediate frequencies. We are interested in the first, the “wide band” one, the first one of the main band pass filter (the roofing filter so to speak). The one described here is therefore the sequence of operations to be performed to obtain a bandwidth sufficient to make a panoramic receiver around the selected IF frequency. The following image shows the point where the IF signal will be taken.

Let’s start by analyzing the wiring diagram. We have to find the first mixer, the PTT and where to take the power supply. From the following images everything will appear clear.

At this point we have to locate the points where we connect the electric cables to the IFace. The following images show where to take the various signals.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

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

Installing the IFace inside the IC-746PRO

These are the instructions to install the IFace interface inside of the Icom IC-746PRO. The installation is very easy.

The IC-746PRO, as well as other radios, has a fairly complex configuration and uses different intermediate frequencies. We are interested in the first, the “wide band” one, the first one of the main band pass filter (the roofing filter so to speak). The one described here is therefore the sequence of operations to be performed to obtain a bandwidth sufficient to make a panoramic receiver around the selected IF frequency. The following image shows the point where the IF signal will be taken.

Let’s start by analyzing the wiring diagram. We have to find the first mixer, the PTT and where to take the power supply. From the following images everything will appear clear.

At this point we have to locate the points where we connect the electric cables to the IFace. The following images show where to take the various signals.

Below is shown the card affected by the mods. It will not be difficult to make the required small welds, space is not lacking.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

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

Installing IFace inside the R-5000

This page shows how to install the IFace in the Kenwood R-5000. Being a receiver we will not have to use the PTT signal, so the installation will be even easier.

The R-5000 uses different intermediate frequencies depending on the band on which it is operating (HF or VHF) but there is a common one, 58.1125 MHz. The one described here is the sequence of operations to be performed to obtain the signal to be sent to the external SDR receiver and shows where to connect the power and signal pickup wires.

The following images show the block diagram of the radio and the point where to take the IF signal.

Let’s analyze the wiring diagram to find the exact point where to take the IF signal and the power supply for IFace.

The following image shows where the signals relative to the IF and to the supply voltage are located.

This last image helps to identify the points where to take the IF and the power supply.

With the coaxial coaxial cable supplied in the kit, the IF signal goes from the IFace to the external SDR receiver.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

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

Installing IFace inside the TS-2000

These are the instructions to install the IFace interface inside of the Kenwood TS-2000. The installation is very easy.

The result you can obtain is well shown in the following video.

The TS-2000, as well as other radios, has a fairly complex configuration and uses different intermediate frequencies depending on the band on which it is operating. In any case, the one described here is the sequence of operations to be done to obtain sufficient bandwidth to make a panoramic receiver around the selected IF frequency. For this reason we opt for the first average frequency and before the roofing filter (or intermediate frequency filter).
The following image shows the point where the IF signal will be taken for reception in the HF / 50 MHz band.

  • The point where you can take the IF signal can be more precisely identified by means of the wiring diagram as shown in the following images. We can use the CN6 connector (pay attention to the polarity). The electronic card of interest is the one called TX-RX1 and is located on the bottom side of the radio.
  • Now we have to look for the point where to draw the power supply. In the lower part of the TX-RX1 diagram on the left is the “PANEL” connector. Nearby is the resistance R398: at the ends of this it is possible to take the voltage with which to feed the IFace. These components are physically located near the CN6 connector from which the IF signal is taken.
  • PTT: for the TS-2000 it is not required because the reception circuit is automatically muted (MUTE) during transmission.
  • In the following pictures you can see how close to each other are the points where to take the IF signal and the power supply: the installation is therefore really simple.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

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

Installing IFace inside the TS-530s

These are the instructions to install the IFace interface inside of the Kenwood TS-530s. The installation is very easy.

  • On the upperside of the radio, after removing the cover, locate the electronic board called “IF Unit”: this is shown in the following picture. In the same you can also see where you can mount the IFace
    with simple double-sided adhesive tape.
  • Refer to the following images of the wiring diagram to identify the points where you can weld the cables for the IF, power supply and PTT.
  • Refer to the following image to identify the points on the PCB where to weld the various connecting cables.
  • Finally connect the coaxial output cable of the IF signal and pass it through the ventilation holes of the radio as shown in the picture.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

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

List of the radio mods to apply the IFace

Here below you can find links to the articles that describe how to modify your radios to insert an IFace interface into them. For those radios that are not included yet, send a request so that it can be entered as soon as possible.


ICOM

KENWOOD

YAESU

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

Installing IFace inside the FT-450D

These are the instructions to install the IFace interface inside of the YAESU FT-450D. The installation is very easy.

  • On the underside of the radio, after removing the cover, locate the electronic board called “RF-IF Unit”: this is shown in the following picture. In the same you can also see where you can mount the IFace
    with simple double-sided adhesive tape.
  • Refer to the following images of the wiring diagram to identify the points where you can weld the cables for the IF, power supply and PTT.
  • Refer to the following image to identify the points on the PCB where to weld the various connecting cables.
  • Finally connect the coaxial output cable of the IF signal and pass it through the ventilation holes of the radio as shown in the picture.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

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

IFace – IF tap/pat interface

Would you like to have a radio with a nice 40 “LCD display where you can view spectrograms, waterfalls and much more information? And what would you say to have a modern SDR radio so that you can listen to more signals at the same time? Wouldn’t it be nice to have many digital filters to improve reception during contest or DX activity? If you answered yes then IFace is the electronic card that allows you to have all of this without having to buy a new radio. How? By inserting it inside your “old” beloved RTX and using a cheap SDR receiver for computers such as an USB RTL-SDR dongles. Don’t you think so? Please watch this video and then keep reading.

The idea behind this product is to continue to use the radio that we have purchased and which has already given us so much satisfaction. Surely we already have the CAT interface with which we control it from the LOG or from other programs and we also have the audio interface for the digital modes. But sometimes we realize that we would need a second receiver (for example to follow the +5 kHz or + 10 kHz of a DX station), band filters with steeper sides to eliminate a disturbance on an adjacent frequency or a notch because our radio does not have it or it is not automatic. All this can be a memory!

So suppose to send the intermediate frequency signal (IF) of our radio to a dedicated SDR receiver and to start a program such as HDSDR (or SDR #, SDR Console …). On the screen of our computer we would have the spectrum display around the IF of our radio and, not to be neglected, we could also demodulate what it is receiving. But we could do even more, we could also demoulate other signals that are above or below the frequency tuned by our RTX.
Not bad, right?
The image below shows a screenshot of HDSDR connected to an FT-450D via an RTL-SDR and the IFace.

Reception at the IF frequency of a FT-450D though the IFace and a RTL-SDR.

What needs to be done is very simple. Let’s start by identifying within our radio the point where to take the medium frequency signal. This is between the output of the first mixer and the subsequent bandpass filters as shown in the following image.

In order to not alter the operation of our receiver, we must pick up the signal without charging the mixer, i.e. without taking power. For this reason we have to insert a special card between this and the external receiver: we can not connect it directly. The IF signal pick up card, the IFace, creates a copy of the signal to be sent to the external SDR receiver. This is a wideband and no-tune buffer, i.e. no calibration is needed, it is installed and it is ready to work. The usefulness of this circuit is to allow the medium frequency signal to be replicated without increasing the load seen by the source (the mixer) and therefore without changing its performance.

Once the IF signal has been obtained, it is sufficient to connect the A / D converter (an RTL-SDR is already more than enough) to the USB port and start the software for the reception (ex HDSDR, SDR #, SDR Console etc) and our RTX will now be equipped with a nice panoramic receiver.

Are you already convinced? Very well, buy an IFace immediately by clicking on the button below!

There are numerous advantages in picking up the IF signal and not the one coming directly from the antenna: one of these is surely the fact that the amplitude of the signal is controlled through the AGC circuitry of the reception stages. This helps to prevent saturation of the dynamics of RTL-SDR (which is not known to be the most extensive). The point where you take the IF signal is easy to find, just take the schematic diagram of your radio and look for the first mixer: at its output you will find the signal of interest. The image below shows the point where you have to connect the IFace interface in the case of a Kenwood TS-530s, a radio of a few decades ago, which can be easily updated with this interface.

The connection to the chosen point can be made with a thin coaxial cable (type RG178 or RG316) and will terminate at the “Input” pad of the IFace. If the connection is very short, a coaxial cable may not be necessary. The “Output” instead will be connected with another small coaxial cable to the input of the chosen SDR receiver. Obviously the buffer must be powered: it will not be difficult to find inside the radio a point where to draw a voltage of 9 Vdc or 12 Vdc. The following images show how easy it is to install the IFace into the TS-530s.

After making these simple wiring, you can connect your SDR receiver and start the reception software. The following image shows the SDR# screen during the reception with a Kenwood TS-530s (its intermediate frequency is 8.83 MHz) and an economical RTL-SDR.

Another IFace has been installed in a YAESU FT-450D. As you will see from the photos, the space occupied is very little and the time required to connect the 4 conductors (+13 V, Gnd, Ptt +, IF) is a few minutes. In this case the Ptt signal was used, that is the “TX” signal present in the IF-UNIT of the radio. All this clearly appears in the following images.

Did this finally convince you? Buy an IFace by clicking on the button below!

Main characteristics of the IFace are:

  • power supply: 9-15 Vdc, I <50 mA
  • bandwidth: > 700 MHz
  • input impedance: > 500 kOhm
  • ouput impedance: 50 Ohm
  • power-down input ( PTT)
  • dimensions: 38 x 48 mm

In case you do not want to display any signal during transmission it is possible to turn off, by sending it into power down, the buffer of the IFace through a special input pin (PTT) as shown in the following picture. To be more accurate, an active high PTT, i.e. the signal is at 12 V when transmitting, or an active low PTT, i.e. the signal is at 0 V when the radio is transmitting, can be used .

The following video shows how the card reacts to the pressure of the PTT, that is when the radio changes from reception to transmission: the red LED indicates that the card is in power-down because the radio is transmitting.

If you were still not convinced of the goodness of this interface look at this other video where you can see how the IFace works when added to an old Kenwood TS-530s.

The launch price of IFace is only € 39.78 including VAT + shipments (subsequently the cost will go up). By ordering now you will guarantee the best price possible.

In this page you can find the list of the instructions to install the IFace into your radio: it is continuoursly growing. For those radios that are not included yet, send a request so that it can be entered as soon as possible.

Content of the delivery:

  • one IFace board
  • a coaxial cable with both a SMA-f panel connector and a SMA-m connector in order to connect the IFace to the SDR receiver
  • four wire to connect the board to the PTT, IF and powering points on the radio (colors of the wires may be subject to change).

Order now by clicking on the following button and have fun.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

Any question? Please use the following form.