WeSaCom   APT-06  /APT-06AD
Weather Satellite Receivers
Small, reliable, professional quality and  performance ...
= Made in Germany =

recent image
Recent images received with APT-06


APT-06    WeatherSat-Receiver

New version with direct computer control via USB, no serial conversion cable needed.  No external power required (yet possible).
USB 3.0, 2.0 and 1.1 compatible.
High noise immunity due to strong filtering in the front end and IF circuits.
Supplies active antennas or preamplifiers with 9V DC via coaxial cable (activated by rear panel jumper plug).
Offers signal level/quality indication on row of 5 LEDs and built-in loudspeaker.
APT-06AD additionally featuring antenna diversity  with twin antenna sockets and automatic selection by noise evaluation. Comes with  Audio- and USB- cable, Software on CD.

Outside EU price: Only € 210.00 (APT-06AD  € 285.00) / free shipping worldwide. To =>  SHOP


The APT-06 was especially designed to receive Polar Orbiter Weather Satellites in the  VHF frequency range. It feeds the received image data into the sound input of a PC or laptop computer for further processing so that an automatically operating weather satellite image reception station can be set up. Besides automatic operation, the APT-06 also offers manual control capability, which is helpful especially during setup and for experiments. Furthermore the APT-06 package comprises the Windows software program APT-CONTROL, which can be operated in a separate window besides the image decoding program. It allows detailed frequency- and other remote control functions on the APT-06.

An exactly matched receiver IF bandwidth of +/- 16 kHz together with an extremely linear phase-locked-loop-demodulator guarantees the superior image quality and precise temperature calibration WRAASE / WeSaCom Systems are well known for.

Considering its outstanding receiving capabilities, the APT-06 offers a very high price/performance value..

Satellite frequency Doppler shift is precisely compensated by a special AFC-circuit, which is fully active already when the satellite comes up over the horizon. This eliminates noisy reception periods when the satellite is quickly approaching from long distance. In addition, an active filter circuit carefully matched to the satellite subcarrier frequency is implemented to reduce remaining noise components.

In the input rf amplifier high-quality Hi-Q-filters with silver plated and shielded helical coils provide a very high immunity against interference from strong signals in the close-by aviation and ham radio bands.

Due to the low noise figure (typical 1dB) of the built-in rf-amplifier an additional antenna amplifier normally is  not necessary. However, when a long antenna feed must be used, an antenna preamplifier or an active antenna is advantageous because it compensates for the cable loss and thus increases the reception range. For active antennas, like our MX-137 or KX-137,  the DC supply voltage (9V) can be added to the antenna socket by simply placing a jumper on the rear panel ("ANT-DC").

At any time signal quality can be monitored by the built-in switchable loudspeaker.

Undisturbed by any other signals, the built-in frequency scanner reliably locks only to weather satellites. It looks for the special weather satellite subcarrier frequency and will not hang on other signals like simple scanners do. Once a satellite has been found, the APT-06 locks on its frequency as long as it is in the range of reception even if there are signal drop outs. The lock-in routine can be manually released at any time, which might be necessary if at the same time several satellites are in the range of reception and the scanner has locked on an unwanted one. Such ambiguity can be avoided when having the APT-06 frequency being controlled by the PC software via the USB interface. The "WX-to-Image” software  provides such capability and it controls the APT-06 so that the proper channel is automatically selected for the next satellite to be recorded. Besides "WX-to-Image" any other soundcard-based APT-decoder software can be used.  The 5 red LEDs change from channel indication into a signal level/quality meter after a channel has been manually selected (with 10 seconds delay ).  Instead of simply showing the relative signal strength, the processor continuously computes and indicates the rounded signal-to-noise-ratio, which is much more meaningful when receiving frequency modulated signals with image information.

The APT-06 applies advanced technology in the demodulator implementation: A carefully designed, precise phase-locked-loop circuit with a special integrated circuit is used to demodulate and extract the satellite subcarrier. Due to the excellent linearity and the much lower noise it is the best available choice for picture generation. The result is a clearer image and a wider  range of reception.
The advanced model APT-06AD contains an Antenna Diversity Circuit, which under difficult reception conditions provides means to effectively reduce signal drop-outs and noisy image sections. The APT-06AD uses the noise value as switching criterion: A fast microprocessor continuously analyzes the signal-to-noise ratio and selects the less noisy antenna. Such antenna-diversity based on noise evaluation is much more efficient than simple  signal strength based circuits.

Technical Data APT-06 / APT-06AD:

  • Frequency range: 137-138 MHz (134-141 MHz at reduced performance)
  • Channel step size: 10kHz
  • Fixed hardware-channels: 5 (by firmware extendable to 9)
  • Arbitrary channels, set by software: 10
  • Sensitivity: Better than 0,25µV @ 20dB S/N CCITT
  • Adjustable AF-Output level: 0 to 1000mVpp (1kOhm)
  • AFC-pulling range ±10kHz
  • Low-noise, extremely linear Phase-Locked-Loop Demodulator.
  • Dynamic range 80 dB (at +/-16kHz deviation and 2400Hz modulation).
  • USB controlled and powered, no external power required (yet possible).
  • Ext. Power input 9 to 12V, max. 100mA, wrong polarity protected.
  • Size: 105x105x30mm / rugged, 2mm thick anodized aluminum case
  • Operating controls: Channel /mode selection pushbutton,
    Speaker-ON pushbutton.
  • 5 red LEDs for channel & signal quality indication
    1 green LED for antenna diversity indication (APT-06AD only)
  • 1 green LED, indicates that satellite signal is available
  • Antenna inputs(s): 50 Ohms, BNC (APT-06AD has 2 of each)
  • USB / B socket, compatible with USB 3.0, 2.0 und 1.1.
  • USB cable included.
  • Additional feature in APT-06AD: Antenna diversity.

Download: Manual APT-06 / APT-06AD PDF 270 KB

If you have any questions, please feel free to use our contact form.

ORDER HERE, only if you are from outside the EU :
If you live within the EU please order in our
=> webshop
(Due to taxes prices are different in the European Union: APT-06 245,00 € and APT-06AD 335,00 € )


 Prices for international buyers outside the European Union. Shipping as registered air mail is included


  Click button to buy now



Receiver complete with USB & audio cable.
USB controlled and powered. No external power needed.

€ 210.00
outside EU only!



Receiver complete with USB & audio cable. 
USB controlled and powered. No external power needed.

€ 285.00
outside EU only!





Prices and specifications are subject to change without notice.

Home | Introduction | Systems | Hardware | Contact | Pricelist

© Copyright 2017  by WRAASE electronic
VAT-ID: DE134379120, Owner: Ing. Volker Wraase, Kronsberg 10, D-24161 Altenholz
We dissociate us from the contents of any links available on our website, because we can't influence such contents.