KJ4YZI

People

• Eric Hofer, KJ4YZI — Interview guest and creator of Ham Radio Concepts. https://www.youtube.com/@HamRadioConcepts
• Eric Guth, 4Z1UG — QSO Today host conducting the interview. — https://www.qsotoday.com/podcasts/4z1ug

Places

• Vero Beach, Florida — Hofer’s home and primary amateur-radio operating area. — https://www.covb.org/
• Sebastian, Florida — Community near Vero Beach explicitly mentioned when describing Hofer’s QTH. — https://www.cityofsebastian.org/
• Fort Lauderdale, Florida — Hofer’s birthplace and starting point of his former repeater-monitoring drives. — https://www.fortlauderdale.gov/Home
• Jacksonville, Florida — End point of drives during which Hofer worked repeaters county by county. — https://www.jacksonville.gov/
• Tallahassee, Florida — Location where Hofer tested participation in established repeater groups. — https://www.talgov.com/
• Gainesville, Florida — Another location where Hofer joined local repeater conversations. — https://www.gainesvillefl.gov/Home
• Orlando, Florida — Location associated with HamCation and Hofer’s hamfest attendance. — https://www.orlando.gov/Home
• Dayton, Ohio — Location associated with the Dayton Hamvention discussed in the interview. — https://www.daytonohio.gov/

Organizations, Clubs & Publications

• ARRL — U.S. national amateur-radio association discussed regarding publications, spectrum defense, and outreach. — https://www.arrl.org/
• QST — ARRL amateur-radio magazine whose VHF-and-above coverage is discussed. — https://www.arrl.org/qst
• Florida Weak Signal Society — Florida organization specifically mentioned for weak-signal VHF enthusiasts. — https://flwss.net/
• Israel Amateur Radio Club — Israeli amateur-radio organization mentioned regarding spectrum-defense support. — https://www.iarc.org/english-membership/

Events

• Dayton Hamvention — Major U.S. amateur-radio convention discussed for exhibits and YouTube coverage. — https://hamvention.org/
• Orlando HamCation — Florida amateur-radio convention attended by Hofer. — https://www.hamcation.com/
• ARRL Field Day — Amateur-radio operating event discussed in relation to 2-meter SSB activity. — https://www.arrl.org/field-day

Equipment

• Cobra 29 LTD — CB transceiver Hofer received for his tenth birthday. — https://www.cobra.com/products/29ltd
• Radio Shack HTX-202 — Two-meter handheld Hofer identifies as his first amateur-radio transceiver. — https://www.manualslib.com/manual/4045575/Radio-Shack-Htx-202.html
• Icom 9700 — VHF/UHF/1.2-GHz transceiver discussed for weak-signal and EME operation. — https://www.icomamerica.com/lineup/products/IC-9700/
• Icom 705 — Portable transceiver cited as equipment many modern amateurs already own. — https://www.icomamerica.com/lineup/products/IC-705/
• Icom 7300 — HF transceiver used by Hofer for extremely low-power FT8 experiments. — https://www.icomamerica.com/lineup/products/IC-7300/
• Icom 706 Mark 2G — Older multiband transceiver recommended as an affordable used-radio example. — https://www.icom.co.jp/lineup/products/IC-706MKIIG/
• SharkRF M1KE — Internet-connected amateur-radio device discussed as an alternative to conventional radios. — https://www.sharkrf.com/products/m1ke/
• IFR COM-120B — Communications service monitor Hofer uses in professional land-mobile-radio work. — https://www.opweb.de/en/manufacturer/ifr/com-120b
• IFR 1200 Super S — Additional radio service monitor explicitly mentioned by Hofer. — https://bama.edebris.com/manuals/ifr/1200S

Antennas

• Yagi antenna — Directional antenna used extensively for Hofer’s VHF, UHF, and EME experiments. — https://www.arrl.org/antenna-modeling-files
• Cubical quad antenna — Two-meter antenna Hofer built with assistance from his YouTube audience. — https://www.arrl.org/arrl-antenna-book

Modes & Operating Technologies

• Earth-Moon-Earth (EME) — Moonbounce communication technique central to Hofer’s recent weak-signal experimentation. — https://www.arrl.org/weak-signal-vhf-dx-meteor-scatter-eme-moonbounce
• FT8 — Weak-signal digital mode Hofer uses on HF and VHF. — https://wsjt.sourceforge.io/wsjtx-main_en.html
• Weak-signal operation — Hofer’s preferred operating practice across VHF, EME, and digital modes. — https://www.arrl.org/weak-signal-vhf-dx-meteor-scatter-eme-moonbounce
• EchoLink — Internet-linked amateur-radio system mentioned with repeater capabilities. — https://www.echolink.org/help_ex/intro.htm
• AllStarLink — Network used to interconnect amateur-radio repeaters and nodes. — https://allstarlink.org/
• DMR — Digital mobile-radio mode discussed for worldwide amateur talk groups. — https://www.dmr-marc.net/
• D-STAR — Digital amateur-radio mode Hofer explicitly considers legitimate RF radio operation. — https://dstarinfo.com/
• System Fusion — Yaesu digital voice system mentioned among modes supported by internet-connected devices. — https://systemfusion.yaesu.com/what-is-system-fusion/
• Amateur-radio satellite operation — Space-communications activity Hofer identifies among his preferred operating interests. — https://www.amsat.org/
• Amateur repeaters — Repeater operation introduced Hofer to amateur radio and remains a major interview topic. — https://www.arrl.org/frequency-coordinators
• Simplex operation — Direct station-to-station operation contrasted with repeater communication. — https://www.arrl.org/band-plan
• Single sideband (SSB) — Voice mode emphasized for long-distance two-meter terrestrial contacts. — https://www.arrl.org/band-plan
• CW — Morse operating mode discussed for two meters and EME. — https://www.arrl.org/band-plan
• FM — Primary mode Hofer initially encountered through two-meter repeater operation. — https://www.arrl.org/band-plan
• AM — Mode specifically cited among possibilities available on two meters. — https://www.arrl.org/band-plan

Icom IC-9700 VHF, UHF, 1200 Transceiver

Icom IC-705 HF, VHF, UHF Portable Transceiver

Icom IC-706, MK2, HF all band

IFR 1200S Service Monitor