Bibliography
Everything a claim here may rest on, whether or not the build downloads it. Sources are graded 1–4: a number in a lesson has to trace to level 1 or 2, and a lesson resting on level 3 or 4 says so in the sentence rather than presenting convention as rule.
27 references · 12 are also fetched and hashed by the build, and appear on the provenance ledger · regulation text is reproduced in full.
Level 1 — Regulation
The regulation itself. A number in a lesson must trace here or to level 2.
cfr-14-107· Office of the Federal Register · regulation · retrieved 2026-07-30Supports
- §107.41 airspace authorisation, §107.51 operating limits, §107.31 visual line of sight
- §107.52 and §107.53 transponder and ADS-B Out prohibitions
- §107.65 aeronautical knowledge recency; §107.205 the closed waiver list
part107airspaceuaswaivers
cfr-14-89· Office of the Federal Register · regulation · retrieved 2026-07-30Supports
- §89.305 and §89.315 message elements — the difference between a standard aircraft and a broadcast module
- §89.405 leaves the radio layer to an accepted means of compliance
part107remote-iduasbroadcast
cfr-15-200· Office of the Federal Register · regulation · retrieved 2026-07-30Supports
- §200.107(a) — WWV broadcasts on 2.5, 5, 10, 15, and 20 MHz; WWVH on 2.5, 5, 10, and 15 MHz
- §200.107(b) — WWVH announces at 15 s before the minute, WWV at 7.5 s, distinguishable by voice
25 MHz is deliberately absent: WWV's 25 MHz transmission is experimental and has been switched off and on, so it is not a dependable propagation reference and the regulation does not list it.
wwvtime-standardpropagationsdr-lab
cfr-47-87· Office of the Federal Register · regulation · retrieved 2026-07-30Supports
- §87.173(b) is the assignable-frequency table behind the aircraft band plan
- 118.000-136.975 MHz on 25 kHz spacing; 121.500 MHz emergency and distress
- 108.000-117.950 VOR, 108.100-111.950 ILS localizer
- UNICOM assignments, and that 122.950 MHz is the towered-airport UNICOM
aviationband-planpart107monitoring
cfr-47-95· Office of the Federal Register · regulation · retrieved 2026-07-30Supports
- The GMRS channel plan, power limits, and station types
- §95.1761 equipment certification, and why a programmable handheld is a problem on GMRS
gmrsfrsmursrulescertification
cfr-47-97· Office of the Federal Register · regulation · retrieved 2026-07-30Supports
- Every amateur band edge, power limit, and operating rule in the three exam tracks
- §97.3(a)(30) defines Line A; §97.303(m)(1) bars 420-430 MHz north of it
- §97.303(h)(3) gives the current 60 m allocation: four discrete channels plus 5351.5-5366.5 kHz
- §97.313(i) sets 60 m power at 100 W ERP on the channels and 9.15 W ERP in the band
- §97.313(k)-(l) cap 2200 m at 1.5 kW PEP / 1 W EIRP and 630 m at 500 W PEP / 5 W EIRP
- §97.15(a) antenna structure notification; §97.15(b) codifies PRB-1; §97.15(c) the 60 m LF/MF antenna height cap
- §97.509 lists the relatives a VE may not examine
amateurrulesbandspowerexams
Level 2 — Published question pool
The published question pool — the only authority for what an exam asks.
ncvec-pools· National Conference of Volunteer Examiner Coordinators · standard · retrieved 2026-07-30Supports
- Every question, keyed answer, and syllabus group in the three amateur tracks
Released publicly because 47 CFR 97.523 requires it. For what the exam asks, this is the only authority — including where its keyed answer simplifies or lags the regulation, which the lessons say out loud.
amateurexampoolverbatim
Level 3 — Official agency guidance
Official agency guidance: public notices, datasets, accepted standards.
faa-remote-id-moc· Federal Aviation Administration (87 FR 49520) · notice · retrieved 2026-07-30Supports
- The FAA accepts ASTM F3586-22 as a means of compliance under 14 CFR 89.405
This is the link between the performance rule in Part 89 and the radio layer in ASTM F3411 — the reason Part 89 never names a frequency.
part107remote-idstandarduas
faa-uasfm-data· Federal Aviation Administration · dataset · retrieved 2026-07-30Supports
- The full set of LAANC grid ceilings: 0, 50, 100, 150, 200, 250, 300, 350, 400 ft AGL
Queried directly rather than read from a summary, because most secondary write-ups list an incomplete set of ceilings. The distinct CEILING values come straight from the service.
part107laancairspacedataset
fcc-da-16-1048· FCC Wireless Telecommunications Bureau · notice · retrieved 2026-07-30Supports
- E1C06 — a US operator using CEPT privileges must carry a copy of this notice
- Advanced and Amateur Extra grants convey CEPT Radio Amateur Licence privileges under T/R 61-01
Issued 2016-09-16. The pool names this document by number, so the document itself is worth having rather than a summary of it.
amateurinternationalceptextra
fcc-oet65b· FCC Office of Engineering and Technology · guidance · retrieved 2026-07-30Supports
- G0A06 names this bulletin by title as the way a station evaluation is performed
- The station-evaluation tables behind 'perform a routine RF exposure evaluation'
Predates the 2019 and 2021 rule changes that removed the categorical power exemptions, so its *procedure* remains current while its exemption thresholds do not. Lessons cite it for method, never for who is exempt.
rf-exposuresafetympeamateurevaluation
fcc-prb-1· Federal Communications Commission · notice · retrieved 2026-07-30Supports
- PRB-1 is a 1985 Memorandum Opinion and Order reported at 101 FCC 2d 952
- It requires reasonable accommodation and minimum practicable regulation by state and local authorities
Rarely needs to be read directly: 47 CFR 97.15(b) codifies the holding and cites the docket by name, so the rule text is both the better citation and the one already pinned in this build.
amateurzoningantennasprb-1extra
Level 4 — Standards bodies, manufacturers, trade sources
Standards bodies, manufacturers, trade sources. Citable only when the lesson says what kind of source it is.
arrl-band-plan· American Radio Relay League · organisation · retrieved 2026-07-30Supports
- Voluntary band-plan convention, including that 30 m carries no contest operating
Convention, never rule. Any lesson resting on this says so in the sentence, because a band plan has no force and the CFR does.
band-planconventionoperatingcontest
arrl-license-manuals· American Radio Relay League · book · retrieved 2026-07-30Supports
- Background reading; not a source for any fact in this material
On the learner's shelf. A copy bought before mid-2026 teaches the retired 2022-2026 Technician pool, so it is useful for explanation and unusable for question practice. This entry exists to keep that visible.
bookownedtechniciangeneral
astm-f3411· ASTM International · standard · retrieved 2026-07-30Supports
- Remote ID broadcasts over Bluetooth 4 Legacy Advertising, Bluetooth 5 Long Range, Wi-Fi NAN, and Wi-Fi Beacon
- Bluetooth 5 Long Range is a mandatory transmit method in F3411-22a; Bluetooth 4 Legacy is optional
Paywalled, so lessons cite it for the fact that it exists and what it specifies, never quote it. The open-source opendroneid project implements the same message set and is readable.
remote-idbluetoothwifiuaspaywalled
belden-8259· Belden · datasheet · retrieved 2026-07-30Supports
- RG-58 attenuation: 0.4/1.5/3.7/5.4/8.1/12.4 dB per 100 ft at 1/10/50/100/200/400 MHz
- 66% velocity of propagation, used for the TDR distance-to-fault example
coaxfeed-linelossrg-58
belden-9258· Belden · datasheet · retrieved 2026-07-30Supports
- RG-8X attenuation: 0.3/0.9/2.1/3.1/4.5/6.6 dB per 100 ft at 1/10/50/100/200/400 MHz
- 82% velocity of propagation for foam dielectric
coaxfeed-linelossrg-8xfoam
noaa-apt· NOAA NESDIS / signal identification community · manual · retrieved 2026-07-30Supports
- NOAA-15 on 137.620, NOAA-18 on 137.9125, NOAA-19 on 137.100 MHz
- Imagery amplitude-modulated onto a 2400 Hz subcarrier, then FM onto the 137 MHz carrier
- About 34 kHz occupied bandwidth, which sets the receiver filter width
aptsatellitesdr-labdecoding
nrao-nrqz· Green Bank Observatory / NRAO · observatory · retrieved 2026-07-30Supports
- The NRQZ is roughly 13,000 square miles across West Virginia, Virginia, and a corner of Maryland
- Established by the FCC in 1958; protects Green Bank and the Navy facility at Sugar Grove
nrqzinterferenceextrarules
opendroneid· Open Drone ID project · manual · retrieved 2026-07-30Supports
- A readable implementation of the ASTM F3411 message set, for the Remote ID receiving exercise
remote-idopen-sourcesdr-labuas
pint· Hernan E. Grecco and contributors · manual · retrieved 2026-07-30Supports
- Dimensional checking of worked examples, which catches a unit slip that arithmetic alone cannot
toolingunitsvalidation
schemdraw· Collin J. Delker · manual · retrieved 2026-07-30Supports
- Circuit schematics drawn as code, on the same matplotlib axes and palette as every other figure
toolingfiguresschematiccircuits
scikit-rf· scikit-rf developers · manual · retrieved 2026-07-30Supports
- Independent cross-check of SWR, reflection coefficient, and transmission-line numbers in scripts/tests/test_rf_numbers.py
Deliberately a *second* implementation. Re-deriving a claim with the same arithmetic that produced it proves nothing; skrf is maintained elsewhere and published in the open-source literature.
toolingrfswrtransmission-linevalidation
sympy· SymPy Development Team · manual · retrieved 2026-07-30Supports
- Every formula `derivation` block: solves the premise and proves simplify(solution - yields) == 0
A derivation printed in a lesson is only worth printing if it is checked. SymPy is what checks it, on every `make check`.
toolingderivationalgebravalidation
times-lmr400· Times Microwave Systems · datasheet · retrieved 2026-07-30Supports
- LMR-400 attenuation: 0.7 dB/100 ft at 30 MHz, 1.5 at 150 MHz, 2.7 at 450 MHz
- The published loss model, dB/100ft = 0.122290*sqrt(f_MHz) + 0.000260*f_MHz
- That the two terms are conductor (skin-effect) and dielectric loss, and that their crossover is ~221 GHz
Manufacturer figures at VSWR 1.0 and 25 C. Unusually, Times publishes the model as well as the table, which is what lets the lesson explain *why* loss has two terms instead of asserting a sqrt-f rule of thumb.
coaxfeed-linelosssdr-lab
understanding-basic-electronics· American Radio Relay League · book · retrieved 2026-07-30Supports
- Background reading for the foundations track
bookownedelectronicsfoundations
wsjtx-guide· Joe Taylor K1JT and the WSJT Development Group · manual · retrieved 2026-07-30Supports
- FT8 15-second cycles and roughly 50 Hz occupied bandwidth
- Mode design intent: MSK144 for meteor scatter, Q65 for EME, WSPR as beacon-only
- The clock-synchronisation requirement common to every mode in the family
ft8ft4wsprq65digitalsdr-lab
Index by tag
Most-referenced first.
- amateurcfr-47-97ncvec-poolsfcc-da-16-1048fcc-oet65bfcc-prb-1
- part107cfr-14-107cfr-14-89cfr-47-87faa-remote-id-mocfaa-uasfm-data
- sdr-labcfr-15-200noaa-aptopendroneidtimes-lmr400wsjtx-guide
- uascfr-14-107cfr-14-89faa-remote-id-mocastm-f3411opendroneid
- remote-idcfr-14-89faa-remote-id-mocastm-f3411opendroneid
- toolingpintschemdrawscikit-rfsympy
- coaxbelden-8259belden-9258times-lmr400
- extrafcc-da-16-1048fcc-prb-1nrao-nrqz
- feed-linebelden-8259belden-9258times-lmr400
- lossbelden-8259belden-9258times-lmr400
- rulescfr-47-95cfr-47-97nrao-nrqz
- validationpintscikit-rfsympy
- airspacecfr-14-107faa-uasfm-data
- band-plancfr-47-87arrl-band-plan
- bookarrl-license-manualsunderstanding-basic-electronics
- ownedarrl-license-manualsunderstanding-basic-electronics
- algebrasympy
- antennasfcc-prb-1
- aptnoaa-apt
- aviationcfr-47-87
- bandscfr-47-97
- bluetoothastm-f3411
- broadcastcfr-14-89
- ceptfcc-da-16-1048
- certificationcfr-47-95
- circuitsschemdraw
- contestarrl-band-plan
- conventionarrl-band-plan
- datasetfaa-uasfm-data
- decodingnoaa-apt
- derivationsympy
- digitalwsjtx-guide
- electronicsunderstanding-basic-electronics
- evaluationfcc-oet65b
- examncvec-pools
- examscfr-47-97
- figuresschemdraw
- foambelden-9258
- foundationsunderstanding-basic-electronics
- frscfr-47-95
- ft4wsjtx-guide
- ft8wsjtx-guide
- generalarrl-license-manuals
- gmrscfr-47-95
- interferencenrao-nrqz
- internationalfcc-da-16-1048
- laancfaa-uasfm-data
- monitoringcfr-47-87
- mpefcc-oet65b
- murscfr-47-95
- nrqznrao-nrqz
- open-sourceopendroneid
- operatingarrl-band-plan
- paywalledastm-f3411
- poolncvec-pools
- powercfr-47-97
- prb-1fcc-prb-1
- propagationcfr-15-200
- q65wsjtx-guide
- rfscikit-rf
- rf-exposurefcc-oet65b
- rg-58belden-8259
- rg-8xbelden-9258
- safetyfcc-oet65b
- satellitenoaa-apt
- schematicschemdraw
- standardfaa-remote-id-moc
- swrscikit-rf
- technicianarrl-license-manuals
- time-standardcfr-15-200
- transmission-linescikit-rf
- unitspint
- verbatimncvec-pools
- waiverscfr-14-107
- wifiastm-f3411
- wsprwsjtx-guide
- wwvcfr-15-200
- zoningfcc-prb-1