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[IDC-136II-KIT] 136kHz Band DC Receiver Kit Price US$45.00
[IDC-136II-BLT] 136kHz Band DC Receiver with enclosure - built and tested Price US$95.00
IDC-136II-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 8MHz 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-136II-KIT
1) With the use of the built-in BPF, images are removed, making it possible to use
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 8MHz oscillator divided by 64. Then,
the LO (@125kHz)
is subtracted from the target signal to get an audio frequency in
the range from 5 to 8kHz.
4) The audio output from IDC-136II-KIT can then be demodulated through software
Spectrum Lab or HDSDR.
Features of IDC-136II-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 24/365 running grabbers
A Windows PC equipped with a MIC or Line-In input with Spectrum Lab or SDR software
You need to prepare an antenna for 136kHz and a power supply unit of 9 - 13.8VDC.
- RX Coverage： 101 ～ 149kHz
(when a 48kHz sound card is used)
- LO: 125kHz = 8MHz divided by 64
- Power Supply: external 9V～ 13.8VDC, ca. 30mA
- Dimension of PCB: 77 x 43mm
(Specifications subject to change without prior notice)
- OSC of 8MHz (125kHz LO) is available upon request.
Note: The enclosure is NOT included in IDC-136II-KIT. IDC-136II-BLT comes with enclosure.
We have been running a 136kHz grabber 24/365 with an IDC-136II-KIT(BLT) at:
Also, some overseas stations having been running grabbers at:
To start with, HDSDR is a good SDR software to use with the IDC-136II-KIT.
For the reception of QRSS/DFCW, we highly recommend Spectrum Lab.
Please download and read through this assembly manual before the purchase.
We are unable to accept any return goods.
Assembly Manual for IDC-136II-KIT
Shipping Charges via EMS:
We have started to ship worldwide. All charges outside of Japan should be bourne
by the purchaser. EMS is a secure way to deliver the goods.
-Asia (excluding Middle East): US$14.00
-NA, CA, Middle East, OC: US$20.00
-Europe (including Russia): US$22.00
-SA and AF: US$24.00
(may vary depeding on JPY/US$ exchange rate fluctuation.)
You can place your order by giving the following info:
-Model No. and Quantity you order
-Your complete Postal Address
Send an order mail to: order @ icas.to (please remove spaces)
We accept Paypal only. The Paypal mail address will be given in the order confirmation return mail.
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