■ Product Catalog
[IDC-136-KIT] 136kHz Band DC Receiver Kit discontinued
[IDC-136-BLT] 136kHz Band DC Receiver with enclosure - built and tested discontinued
The IDC-136 series has been replaced by IDC-136II series. You can visit:
IDC-136-KIT is a direct conversion receiver designed exclusively for 136kHz band
reception. With the use of SDR software, it will work as your main or sub receiver.
It's quite simple and you only need a couple of hours to build and get ready to receive.
The local oscillation is obtained by dividing a 8.32MHz osillator by 64, so the stability
is quite high (QRH to less than 0.1Hz order). Since this receiver is not a SDR requiring
both I/Q signals , you can connect it to the MIC input of your laptop PC.
Principle of IDC-136-KIT
1) With the use of the built-in BPF, images are removed, making it possible to use
manoaural input of your PC.
2) The BPF has some attenuation, so the pre-amp is installed to compensate for
3) The local oscillation is obtained from a 8.32MHz oscillator divided by 64. Then,
the LO (@130kHz) is subtracted from the target signal to get an audio frequency in
the range of 5 to 8kHz.
4) The audio output from IDC-136-KIT can then be demodulated through software
such as Spectrum Lab or HDSDR.
Features of IDC-136-KIT:
◆ Simple structure - needs just a couple of hours for assembly.
◆ Dividing by 64 makes it almost QRH-free - suitable for up to QRSS240.
◆ Sharp software filters can be utilized.
◆ Small current consumption - ideal for 24H running grabbers
A Windows PC equipped with a MIC or Line-In input with Spectrum Lab or SDR software
installed. You need to prepare an antenna for 136kHz and a power supply unit of 9 - 13.8VDC.
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