Metricom Ricochet wireless data radios operated in the 902-928 MHz and 2315-2350/2402-2483 MHz bands.  They were beautifully designed and constructed.

Pictures

• Metricom 2.4 GHz RF Power Amplifier  Uses a Celeritek CMM2321 and CFH2162-P5
• Metricom 2.4 GHz PCB Overview
• Metricom 900 MHz RF Power Amplifier  Uses a Sirenza SHF-0289 and Celeritek CFH2162-P1
• Metricom 900 MHz PCB Overview

Datasheets

• Celeritek CMM2321 2.4 to 2.5 GHz 1 Watt Power Amplifier  (93k PDF)
• Celeritek CFH2162-P5 2.3 to 2.5 GHz +36 dBm Power GaAsFET  (162k PDF)
• Celeritek CFH2162-P1 800 to 900 MHz +36 dBm Power GaAsFET  (31k PDF)
• Alpha AW002R2-12 GaAs SPDT IC 10 Watt T/R Switch - DC-2.5 GHz  (26k PDF)
• Mini-Circuits VNA25 MMIC Amplifier  (55k PDF)
• Sirenza SCA-3 MMIC Amplifier  IF amplifer labeled "C3".  (526k PDF)
• Sirenza SHF-0289 1.0 Watt GaAs HFET  900 MHz IPA labeled "H2".  (155k PDF)
• COMNAV 8BCR12C-915/C25-DX 8-pole Bandpass Filter  900 MHz RX bandpass filter.
• Agilent MGA-86563 Low Noise GaAs MMIC Amplifier  900 MHz RX LNA labeled "86V".  (77k PDF)
• Mini-Circuits SBA-2-22 Power Splitter/Combiner  (228k PDF)
• Sirenza SGA-2286 MMIC Amplifier  Labeled "A22".  (92k PDF)
• Mini-Circuits MBA-25MH Level 13 Mixer  (223k PDF)
• Mini-Circuits ADE-1ASK Level 7 Mixer  (218k PDF)
• WJ WJ515101 2.1-2.7 GHz Low Noise Amplifier  Labeled "515101".  (141k PDF)
• HP INA-02186 Low Noise MMIC Amplifier  Labeled "N02".  (75k PDF)
• HP INA-10386 Low Noise MMIC Amplifier  Labeled "N10".  (43k PDF)
• Skyworks HY92-12 90° Hybrid - 880-960 MHz  Labeled "HY92".  (44k PDF)
• CEL UPB1510GV 3.0 GHz Divide-by-4 Prescaler  Labeled "1510".  (179k PDF)
• CEL UPB1508GV 3.0 GHz Divide-by-2 Prescaler  Labeled "1508".  (51k PDF)
• ON Semiconductor MC12026A 1.1 GHz Dual-Modulus Prescaler  Labeled "026A".  (52k PDF)
• Mini-Circuits MAR-4 MMIC Amplifier  Labeled "A04".  (126k PDF)
• Mini-Circuits VAM-6 MMIC Amplifier  Labeled "A06".  (194k PDF)
• Mini-Circuits VAM-7 MMIC Amplifier  Labeled "A07".  (194k PDF)
• Motorola MC145158 Serial Input PLL Frequency Synthesizer  Labeled "145158".  (391k PDF)
• Hittite HMC190 SPDT Switch  (195k PDF)

Notes & Miscellaneous

• Metricom 900 MHz & 2.4 GHz Board VCO Frequencies
• Metricom Ricochet Modem Reference Guide  (375k PDF)
• Metricom FCC Part 15 Certification Application for FCC ID#GNW-24000  (2.9 MB PDF)  Includes spectrum analyzer plots and frequency notes
• Metricom Modems Support in Linux
• Starmode Radio IP (STRIP)
• 1992 DUBUS Article on Using the MGF-0905 on 13 cm  (63k PDF)  Should work with the CFH2162-P5
• Richochet Hackers Wiki
• Metricom's Ricochet Packet Radio Network  Ham Radio Online, 1996
• Experiences with Metricom and Ricochet
• Metricom, Inc. Assets List  From their bankruptcy hearing.  Includes installation and coverage maps.  (4.4M PDF)

2.4 GHz PCB Markings

FAB P/N 108552-002
REV. B

ASSY P/N 108553-103
REV. U