Receivers for HRPT board Noaa95

Table of contents

commercial RECEIVER

From the receiver, suitable for the frequency 141MHz and 150MHz (if down converter from 1698MHz to 141MHz and from 1707MHz to 150MHz is used), you must drive out the IF 10.7MHz at least 2MHz Band Width.

Here, in the next 2 images, how we reach good IF signal for the Noaa95 HRPT card, using the Icom R100 receiver. Note that many commercial receivers works with schematic diagram similar to PREL107.GIF
ICR100.JPG
...(38KB)		 PREL107.GIF
...(16KB)
Commercial receiver are very expensive so we have planned to build one at low cost. In the next section are available the information to build a home made HRPT RECEIVER which works well.

 

home made RECEIVER

RX frequencies and BW
  • In: 141 MHz and 150 MHz
  • Out: IF 10.7 MHz
  • bandwidth: abt. 2 MHz

RX Schematic Diagram

Download this schematic diagram ...(47KB)

Note about the home made coils:

T1

T3
primario: 4 spire
secondario: 2 spire
3 spire
  • filo Ø 0,5 mm
  • supporto 5-6 mm
  • ferrite F100
  • filo Ø 0,66 mm
  • supporto 5-6 mm
  • ferrite F100

RX photo

 RX LayOut

RX PCBoard

 

RX project by our friend Michael Pedersen

Downolad now the self-extracting archives:

PedRxCAD.EXE
Original EasyTrax binary files
last updated: 16 Apr. 1998

PedRxPCX.EXE
300dpi bitmap PCX files
last updated: 10 Apr. 1998

Contact Michael Pedersen:

E-Mail:

[email protected]
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© 1998 - Enrico Falconelli