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IC-9100 with SDR panadapter

Our buffer interface named IFace can be used to add an SDR panadapter to the Icom IC-9100 transceiver.

The operations to be performed are very simple, it is sufficient to obtain from its wiring diagram the information on the points where to take the IF signals. This radio, in fact, uses different mixers depending on the selected band. In particular, we will have one for HF and 50 MHz, one for VHF and one for UHF (plus a fourth for the optional 1.2 GHz band). The following image shows the block diagram of the radio.

Below is a portion of the HF / 50 MHz reception chain and the list of the various intermediate frequencies: we are interested in the first one so as to have sufficient bandwidth for the panadapter. In HF/50 MHz we will tune our SDR receiver to 64.455 MHz, while in VHF to 10.850 MHz while in UHF to 71.250 MHz.

We now proceed to identify the exact points on the circuit diagram where to take the IF signal to be sent to the IFace. The following images show the sampling points of the signal for the HF and 50 MHz bands and of the power supply for the buffer interface.

Now let’s analyze the circuit diagram for VHF and UHF. It is easy to identify the two mixers and the relative points where to connect the IFace input.

The sampling points for the IF signal for the VHF and UHF bands are shown below. It is therefore clear that this radio requires 3 IFace buffer interfaces in order to cover all the available bands.

In order to purchase an IFace use the button 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 to us using the form below.
Have fun!

FT-818 with SDR panadapter

A loyal friend and customer of ours sent us photos of the installation of our universal IFace interface inside his Yaesu FT-818.

If you wonder what an SDR panadapter can do for your station, watch this video.

This radio is practically the same as the FT-817, so the installation of the interface is identical for both radios. Now that little gem is equipped with an SDR panadapter which makes it an exceptional adventure companion.

Click here to access the installation instructions on this and other radios.

For more information use the form below.

HDSDR settings for SDR panadapter and CAT control

Our IFace interface is used to add an SDR panadapter to any radio, present or future. The image below shows the typical application context where the IF signal of our receiver is sent to an external SDR receiver (in the specific case one from SDRplay).

The configuration we are going to examine is, therefore, the following.

We sample the signal after the first IF mixer but before the bandpass filter, the so-called “roofing filter”, and we send it to our IFace. This is nothing more than a broadband buffer that allows you to replicate the signal without overloading the mixer circuits. At the output of the card, the signal can be sent to an external receiver, typically an SDR, through a common 50 Ohm line.

At this point, there is nothing left to do but install the drivers for our A / D converter for RF signals and the demodulation software. In the specific case, we will use an RSP1 from SDRplay and the HDSDR program. In addition, through the CAT port, we can control our radio so as to have a perfect match of what we see on the screen with what we are receiving from the radio. The CAT interface is managed through the OmniRig software.

The main advantage is that of having a second receiver much more powerful than the internal one of the radio.

The following images show how the HDSDR program should be configured.

The result is also shown in a video where you can appreciate the reception quality and ease of radio control.

For any questions, use the form below.

The best SDR panadapter

After a few months of tests and various evaluations, we can claim to have identified the best SDR panadapter to combine with our IFace. We have tried cheap 8-bit products as well as much more expensive high-end products but this seemed to us the best compromise.

It is a small device to be connected to the USB port of our computers and allows you to digitize RF signals from 10 kHz to 2 GHz with a resolution of 12 bits. It works at a sampling rate such as to have up to 10 MHz of frequency band. It also features a 0.5 ppm TCXO.

Its technical characteristics are as follows:

  • continuous coverage from 10 kHz to 2 GHz
  • 12 bit resolution ADC
  • TCXO 0.5 ppm reference oscillator
  • up to 10 MHz of RF band viewable
  • low background noise compared to 8-bit devices
  • micro-USB 2.0 interface
  • SMA 50Ω antenna connector
  • it can also be used as spectrum analyzer (RF input power 0 dBm max)
  • compatible with all programs for SDRPlay RSP1
  • works with the most popular SDR software (HDSDR, SDR Console, Cubic SDR, and SDRuno)
  • case in anodized aluminum
  • power supply current from USB: 120-175mA
  • high quality/cost ratio

Purchase option 1: SDR panadapter only


Option 2: SDR panadapter bundle + IFace kit


You can find more information in our previous article on which SDR panadapter to use.

In this article you can find how to set up HDSDR to use this SDR receiver together with our IFace.

For further information, please write via the following form.

Panadapter SDR for the TS-440s

To install the IFace card inside the Kenwood TS-440s follow the steps below.

The TS-440s, like other radios, has a fairly complex configuration and uses different intermediate frequencies. We are interested in having a “wide band” signal, so it will have to be picked up before the main bandpass filter. The sequence of operations to be performed to obtain a bandwidth sufficient to realize a panoramic receiver around the chosen IF frequency (45.05 MHz) is shown below. The path of the TX and RX signals is partly separate, so the PTT command to disable the IFace during transmission may not be necessary. The following images show the point where the IF signal will be taken and the power supply.

Now we need to locate the points where to connect the electric cables to the IFace. The following images illustrate where to get the various signals on the RF UNIT.

You can buy an IFace using the button below.

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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!

Panadapter SDR for the TS-430s

To install the IFace card inside the Kenwood TS-430s follow the steps below.

The TS-430s, like other radios, has a fairly complex configuration and uses different intermediate frequencies. We are interested in having a “wide band” signal, so it will have to be picked up before the main bandpass filter. The sequence of operations to be performed to obtain a bandwidth sufficient to realize a panoramic receiver around the chosen IF frequency (48.055 MHz) is shown below. The path of the TX and RX signals is partly separate, so the PTT command to disable the IFace during transmission may not be necessary. The following images show the point where the IF signal will be taken and the power supply.

Now we need to locate the points where to connect the electric cables to the IFace. The following images illustrate where to get the various signals on the RF UNIT.

If you like the idea and the goodness of the proposal buy an IFace using the button below.

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[:]

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!

Panadapter SDR for the IC-735

To install the IFace card inside the ICOM IC-735 follow the steps below.

The IC-735, like other radios, has a fairly complex configuration and uses different intermediate frequencies. We are interested in having a “wide band” signal, so it will have to be picked up before the main band pass filter. The sequence of operations to be performed to obtain a bandwidth sufficient to realize a panoramic receiver around the chosen IF frequency (70.451 MHz) is shown below. The path of the TX and RX signals is partly separate, so the PTT command to disable the IFace during transmission may not be necessary. The following images show the point where the IF signal will be taken and the power supply.

Now we need to locate the points where to connect the electric cables to the IFace. The following images illustrate where to get the various signals on the MAIN UNIT.

If you like the idea and the goodness of the proposal buy an IFace using the button below.

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[:]

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!

Microcontrollor for ARDF beacon

This short acticle refers to another article you can find at this address: https://iz0abd.wordpress.com/2019/05/28/beacon-ardf-a-433-92-mhz/

Those who wish to purchase the PIC12F509 microcontroller already programmed to periodically generate an “S” in Morse code can do so through the button shown below.

For any other detail please visit https://iz0abd.wordpress.com/2019/05/28/beacon-ardf-a-433-92-mhz/ or simply send us your request using the form in the contacts section.

Enjoy

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”.