International Crystal Manufacturing Company, Inc. (ICM) is a family-owned, business established in 1951 to provide crystals, oscillators and filters for the military. Today, ICM manufactures in the U.S. an extensive line of quartz crystals, oscillators, filters, and TCXOs / VCTCXOs used in military applications, communications, microwave transmission, data acquisition and transmission, and cutting edge research
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Digital Modes
FSQCALL – New Digital Mode
A Directed Messaging System for FSQ Introducing FSQCall Sending text using FSQ is generally very reliable, certainly more so than other digital modes... Read more
ZL1BPU Wins June QST Cover Plaque Award
The winner of the September 2015 QST Cover Plaque award is Murray Greenman, ZL1BPU, for his article “FSQ: Fast, Simple QSO.” The QST Cover Plaque Awar... Read more
FT8 in UK and EU contests
Recently, the RSGB Contest Committee has seen some FT8 QSOs being claimed within contest logs. At present it is difficult to complete a full contest e... Read more
Ham Radio HF Digital Modes: Hellschreiber, Feld Hell Tutorial
“Are you tired of PSK31? Are you sick of FT8? Is RTTY just a bunch of contesting anymore? At last, I finally finished this video and started ano... Read more
Getting Started With Digital Modes
This comprehensive video explains the concept behind amateur radio digital modes and describes the hardware and cabling required to get started. This... Read more
VHF
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Kenwood TH-D74 – How to do a quick setup [ Video ]
Kenwood TH-D74 APRS & DSTAR Radio TH-D74 144 / 220 / 430 MHz Tribander APRS : Using packet-transfer communication to exchange real-time GPS positi... Read more
New Microwave, UHF Distance Records Set on Same Day
New distance records were set on 47 GHz and on 902 MHz on June 30 by stations at vastly separated points on the globe. On 47 GHz, US and Canadian oper... Read more
Alinco DJ-MD5T VHF/UHF 5W DMR HT
Alinco DJ-MD5T VHF/UHF 5W DMR DUal Mode Tier I/II HT Features: DMR Tier I and Tier II 1.77 inch TFT color LCD VFO/MR Switch Output Power Selection (5W... Read more
3D Hologram Hytera DMR Radio Demo
Hytera DMR Radio Read more
Amateur Radio Guide to Digital Mobile Radio (DMR) by W2XAB
What is DMR? Digital Mobile Radio (DMR) was developed by the European Telecommunications Standards Institute (ETSI) and is used worldwide by pr... Read more
Review
Surecom SF-401plus frequency counter CTCSS decoder
Introduction: The frequency meter capable of measuring the parameters of the frequency of the continuous carrier signal walkie-talkies , with signal... Read more
Ailunce HD1 Review – Ham Radio Q&A
Ailunce HD1 Review “The Ailunce HD1 is a dual band amateur radio that supports both analog and DMR Tier I&II protocols. As the flagship of t... Read more
LD-5 HF Ham Radio QRP Transceiver – Tech Review
The LD-5, made in USA, by LNR Precision Inc. is an amazing little 5 band SSB/CW Amateur Radio QRP Transceiver that’s small and light enough to... Read more
“Receive Filters” episode of the “ARRL The Doctor is In” podcast. Listen…and learn!
Receiving every signal is not always a good thing — especially when you receive them all at once! The Doctor describes why proper filtering is i... Read more
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