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highly
sensitive and selective superhetrodyne receiver
RX FM 134 - 141 MHz
...A low
cost, high performance, microcontroller driven 10 channel receiver. Ready
for
NOAA 18.
Complete
with all additional components required for full computer control. Supplied
with the WXTOIMG Software...
( SATELIT
NOAA,
METEOR, RESURS,
METEOSAT
... )
[
Česká
verze ]
[ English version ]
[
Index ]
Ing.
Miroslav GOLA
OK2UGS , QTH FRÝDEK - MÍSTEK
CZECH REPUBLIC LOC: JN99EQ
emgo@vuhz.cz
Aktualizace
07. 07. 2007
The
following text is meant for advanced hams and it describes assembly of FM
receiver for interesting waveband of 134 - 141 (137 - 141) MHz, which is used for
transmission of images from space (views of the Earth from meteorological
satellites located at the distance of 850 km or 36000 km).
Receiver
technical data (model
2007)
| Frequency
Range : |
134
- 141 MHz (infinitely adjustable, step by step 10
kHz) |
| Frequency
Synthesizer Step: |
10,0
kHz or alternately 12,5 kHz |
| Input
Sensitivity: |
0,25uV
(rms-type) for 12dB SINAD |
| Intermediate
Frequency: |
10,7
MHz and 455 kHz |
| Tone
decoder/PLL
SE567: |
2400
Hz |
| Pass
band of the 2-st.IF filter: |
30
kHz/ - 3 dB or alternately 15 kHz |
| Power: |
DC
9 V (max.12 V) |
| Current
output: |
70
- 90 mA, according
to the loudness level setting |
| Power
Connector: |
3
mm (+ pole is
inside of the jack pin, - pole is on its surface!!!) |
|
WXtoIMG
Scanning: |
Yes
/ 10
-channel,
controlled by the uP [ RS-232 or USB ] |
| Automatic
Scanning: |
Yes
- 2400 Hz stop point - Squelch function
controlled by the uP |
| S-meter (
analog - digital
): |
Yes |
| Noise
Gate ( SQUELCH ): |
Yes |
| Antenna
Connector: |
"1x
BNC" type |
| Display: |
LCD
1 x 16 alpha - numerical
symbols |
| Connection
for Loud
speaker: |
(or
Headphones) external 8-25 Ohms, CINCH connectors |
| Connection
for PC: |
PIN
connectors or cable from the computer sound card |
| Receiver
Size: |
225x200x70
mm |
PHOTOGALLERY
RX134141MHz
... new model 2007 (unprecedented software
RS-232/WXtoIMG ... operating by
three buttons)
Photogallery RX134141MHz
... old model 2005 (operating by two buttons and
RS-232)
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Complete schematic you will find
here
Components layout, top side
(bot PCB) here
Text here
[will issue in periodical VHF Communications 3Q/2002
]
New
publication... 
You
can order the kit with very detailed assembly instructions and with rich
photo documentation of details and complete unit on CD-ROM at our address:
Ing. Miroslav Gola -
EMGO, Areal VUHZ, a.s., Dobra 240, CZ-73951 Dobrá, Czech Republic
emgo@vuhz.cz
or emgo@iol.cz
You
can view current topical information on internet
site of the company EMGO... http://www.emgola.cz/
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Copyright
2000 - 2007 emgo@vuhz.cz
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