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N3FJPSoftware / N3FJP Software

73, Scott N3FJP https://www.n3fjp.com/ Serving the Amateur Radio Community with contesting and general logging software since 1997
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8,483 Members, 301 Topics, Public Archive, Last Post:

SKCC / Straight Key Century Club

Membership is free to licensed amateur / ham radio operators.
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7,667 Members, 42,093 Topics, Private Archive, Restricted, Last Post:

repeater-builder / Repeater Builder

Discussion of amateur or commercial repeaters, duplexers, antennas, feedlines, controllers, linking, etc is encouraged.
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5,869 Members, 44,383 Topics, Public Archive, Last Post:

FT-857 / YAESU FT-857 Discussion Group

Please give your call sign if you are an amateur radio operator. Note: Many individuals join this list to find out how to modify their unit for extended transmit.
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5,452 Members, 10,977 Topics, Public Archive, Last Post:

N1MMLoggerPlus / N1MM+

N1MM Logger+ (aka N1MM+) is free contesting software that supports virtually all amateur radio contests.
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5,274 Members, 21,235 Topics, Public Archive, Last Post:

Amateur-repairs / Amateur Radio Repairs

Emphasis is on Amateur Radio equipment repair, modification and operation. Please, SHARE WITH US YOUR REPAIRS!. It is a great way to help others to fix their rigs. Thanks!
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4,937 Members, 20,125 Topics, Private Archive, Restricted, Last Post:

EchoLink / EchoLink

This facet of Amateur Radio joins the power of the internet with our radio hobby!
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4,854 Members, 9,984 Topics, Private Archive, Restricted, Last Post:

DXLab / DXLab

DXing is the art and science of making two-way contacts with distant amateur radio stations.
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4,706 Members, 48,533 Topics, Public Archive, Restricted, Last Post:

RaspberryPi-4-HamRadio / Raspberry-Pi_4_Ham-Radio

This is a place for Amateur Radio Ops to discuss the Raspberry Pi and how it can be applied to Ham Radio. This is a moderated Group. Please keep posts civil and on topic.
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4,224 Members, 2,517 Topics, Public Archive, Last Post:

UDXF / Utility DXers Forum

Actually everything in the range of 0-30 MHz with the exception of Broacasting Stations, Pirate Stations, and Amateur Radio (with the exception of utility related activities).
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4,097 Members, 63,162 Topics, Private Archive, Restricted, Last Post:

XieguG90 / Xiegu G90 Transceiver

This is a group to share information and promote understanding of the Amateur Radio transceiver Xiegu G90 and how to use it.
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4,068 Members, 2,706 Topics, Private Archive, Restricted, Last Post:

ic7000

**Please note** A valid amateur radio license is a prerequisite for membership. Applicants are requested to state their name and callsign; this will speed up the approval process.
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3,861 Members, 18,364 Topics, Public Archive, Last Post:

UI-View / UI-View32

If you must post an off-topic message on other amateur radio related matters, please mark the posting OT and request direct replies.
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3,733 Members, 18,468 Topics, Public Archive, Last Post:

APRSISCE / APRSISCE for Windows Mobile and Win32

APRSISCE/32 is intended for licensed amateur radio operators only and that privilege comes with the responsibility of identification by CALLSIGN. It's really not that hard.
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3,592 Members, 7,893 Topics, Public Archive, Restricted, Last Post:

Yaesu-FT-60 / YAESU FT-60

In the USA, it is against FCC regulations to use a modified amateur radio transmitter on commercial frequencies, even if you are licensed to use those frequencies.
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3,405 Members, 3,631 Topics, Public Archive, Last Post:

linuxham / linuxham

To be approved for membership your email address must indicate your amateur radio call sign.
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3,111 Members, 11,079 Topics, Public Archive, Restricted, Last Post:

irlp / IRLP Discussion Group

This is the discussion group for the Internet Radio Linking Project - A Project to link audio from amateur radio transmitters and receivers around the earth using the internet.
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3,031 Members, 17,516 Topics, Public Archive, Last Post:

ManualExchange / Manual Exchange

Group devoted to free exchange of service/user manuals for Instruments and RTX (Amateur/professional).
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2,880 Members, 7,238 Topics, Public Archive, Last Post:

VARA-MODEM / VARA MODEM (HF and FM

This Group is owned and moderated by Jerry, N9LYA Please state your valid amateur radio call sign in the comments section when joining this Group.
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2,576 Members, 1,409 Topics, Public Archive, Restricted, Last Post:

gqrp / GQRP Club

GQRP Club (Low Powered Amateur Radio)
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2,444 Members, 27,298 Topics, Private Archive, Last Post:

radioartisan / Radio Artisan

We support experimenters of all levels and exchange ideas about amateur radio hardware homebrewing and software development, especially involving Arduinos, Raspberry Pis, computers,
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2,430 Members, 3,719 Topics, Public Archive, Last Post:

TS-590 / Kenwood TS-590 Discussion Group

This group with about 2300 members provides a forum for discussions about the Kenwood TS-590S and TS-590SG Amateur Radio Transceiver.
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2,311 Members, 6,891 Topics, Public Archive, Restricted, Last Post:

(SHARI is designed as a kit for construction and use in the amateur radio service by licensed amateur radio operators who can assure that their assembled SHARI kit meets FCC mandated
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2,183 Members, 744 Topics, Public Archive, Last Post:

glaarg-vec / GLAARG VEC

The Greater Los Angeles Amateur Radio Group VEC is one of the 14 FCC-recognized Volunteer-Exam Coordinators conducting amateur radio exams.
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2,035 Members, 9 Topics, Private Archive, Restricted, Last Post:

Ham-Antennas / Ham-Antennas

Discussion of amateur radio antenna systems, feedlines, matching networks, and related topics. Anything and everything, tell us or ask questions.
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1,964 Members, 1,812 Topics, Public Archive, Last Post:

DRAKE-RADIO

For the sharing of information and help in repairing the Drake Radio Line of Amateur Radios. Please note.
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1,907 Members, 15,234 Topics, Public Archive, Restricted, Last Post:

direwolf / Dire Wolf Software TNC

In the early days of Amateur Packet Radio, it was necessary to use an expensive “Terminal Node Controller” (TNC) with specialized hardware. Those days are gone.
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1,900 Members, 1,752 Topics, Public Archive, Last Post:

MMTTY-SB-RTTY / MMTTY Amateur Radio RTTY Software

Since there are numerous sites dedicated to selling radio gear, we will not allow posting equipment for sale. Doing so will get you banned.
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1,841 Members, 223 Topics, Public Archive, Last Post:

FlexRadioSmartSDR / FlexRadioSmartSDR

TAGS: Ham radio Amateur radio Flex radio SDR radio The group is "user owned and operated" and not affiliated with Flex Radio although employees are encouraged to participate
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1,840 Members, 3,495 Topics, Public Archive, Restricted, Last Post:

Elecraft-K4 / Elecraft K4 Direct Sampling Transceiver and then some!

RADIO CALL WHEN APPLYING FOR MEMBERSHIP.
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1,806 Members, 6,199 Topics, Private Archive, Restricted, Last Post:

hfpack / HFpack

INFORMATION - HF PORTABLE - MOBILE - EMERGENCY COMMUNICATIONS - HF Pack - AMATEUR RADIO - TRAVEL - PORTABLE - BASE - MANPACK - BACKPACK - QRP - QRO - BIKE - AIR - MARINE - EQUIPMENT
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1,804 Members, 906 Topics, Public Archive, Last Post:

larrys-list / Larry's List FYI

Larry's List is a group of Amateur Radio messages. This is the main group. There is sub-groups for specific topics. This group is for topic not listed as a sub-group.
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1,722 Members, 7,488 Topics, Private Archive, Restricted, Last Post:

GridTrackerApp / GridTracker - An Amateur Radio Community

GridTracker by the Amateur Radio Community GridTracker : An Amateur Radio Community We are growing so fast and so many new people are joining us, from the Facebook group, the Groups.Io
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1,688 Members, 2,293 Topics, Public Archive, Last Post:

ardop

The groups.io home of the Amateur Radio Digital Open Protocol.
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1,636 Members, 4 Topics, Public Archive, Restricted, Last Post:

Winmor / WinLink - WINMOR Protocol, VARA FM/HF, ARDOP, PACTOR and Related Topics for WinLINK Express

** The Original Unofficial User Support Group Since 2008 ** Please state your valid amateur radio call sign when requesting membership.
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1,620 Members, 452 Topics, Public Archive, Last Post:

Moon-Net / Moon-Net

Moon-Net is an e-mail reflector intended for discussion and announcements concerning amateur radio moonbounce (EME) communications. Membership is open to everyone.
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1,576 Members, 24,164 Topics, Public Archive, Last Post:

steppir / SteppIR Antennas

This is THE place to ask questions and get information from owners and users of these unique, tunable Amateur Radio antennas.
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1,525 Members, 3,072 Topics, Private Archive, Restricted, Last Post:

hflink / HFLINK

Global ALE High Frequency Network HFN - Amateur Radio - Ham Radio - Emergency Disaster Relief Communications - HF Interoperability - ALE Information - Software - Selcall - Digital HF
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1,519 Members, 824 Topics, Public Archive, Last Post:

RSGBTechnical / RSGBTech

Welcome to RSGBTech, an independent group open to ALL radio amateurs to discuss amateur radio related technical matters, be it a technical query or area of interest.
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1,496 Members, 8,914 Topics, Private Archive, Restricted, Last Post:

APRS / APRS - Automatic Packet Reporting System

The APRS network has grown to most countries with strong Amateur Radio populations.
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1,470 Members, 791 Topics, Public Archive, Last Post:

RailScan / RailScan.net

If you are an Amateur Radio operator you can also enter your info in the "RailHam Directory".
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1,418 Members, 10,480 Topics, Private Archive, Restricted, Last Post:

ocfd / Off-Center Fed Dipole antenna group

Make sure that your DISPLAY NAME for this group contains your AMATEUR RADIO CALL SIGN! Otherwise, membership will be DECLINED!
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1,412 Members, 1,404 Topics, Private Archive, Restricted, Last Post:

GenesisRadio / Genesis Radio

Please limit your messages and responses to topics related to amateur radio and Genesis radios, SDR and associated topics.
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1,406 Members, 7,555 Topics, Public Archive, Restricted, Last Post:

Heathkit-Radios / Heathkit-Radios

When joining, please identify yourself as an amateur radio operator by including your call sign, (if licensed), in your profile and/or message signature line.
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1,385 Members, 6,401 Topics, Public Archive, Restricted, Last Post:

FT-991A / Yaesu FT-991 and FT-991A

Always identify yourself or your amateur call sign when you sign in. The Yaesu FT-991 Transceiver is capable of operating SSB, CW, AM, FM, Packet and System Fusion C4FMDigital.
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1,383 Members, 896 Topics, Public Archive, Restricted, Last Post:

Kenwood-Hybrids / Kenwood Hybrids (TS-520/530/820/830)

Including your Amateur Radio Callsign if you are an Amateur Radio Operator will expedite this process. If you do not reply to this email, your membership will not be approved.
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1,346 Members, 2,336 Topics, Public Archive, Restricted, Last Post:

Ham-Pi / HamPi

Net for amateur radio
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1,321 Members, 745 Topics, Public Archive, Restricted, Last Post:

FoxTango

radio transceiver.
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1,312 Members, 1,091 Topics, Private Archive, Restricted, Last Post:

hfprojects

. *** Although HF PROJECTS Radio Amateur Kits for High Frequency including the HF Packer Amplifier, miniHFPA and miniHFPA2.are not readily available, I can provide limited service
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1,300 Members, 2,129 Topics, Public Archive, Last Post:

ardc / Amateur Radio Digital Communications

The mission of Amateur Radio Digital Communications (ARDC) is to support, promote, and enhance digital communication and broader communication science and technology, to promote Amateur
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1,264 Members, 105 Topics, Public Archive, Last Post:

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