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Small explanation improvements for B* and V* questions

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Automatically generated using Claude Code and Opus 4.7 in high reasoning
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Renat Nurgaliyev
2026-05-22 17:12:09 +02:00
parent 044b68fff4
commit 7674643100
1 changed files with 54 additions and 54 deletions
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explanations.json
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@@ -1,61 +1,61 @@
{
"BA101": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DD4UQ spells D as Delta, U as Uniform and Q as Quebec; the traps are country-style words such as Denmark, Uruguay and Queen, which are not the ITU code words.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA102": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DK1KC uses Delta for D, Kilo for K and Charlie for C; Kilowatt, Denmark and Caesar are distractors, not ITU spelling-alphabet words.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA103": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DK5WP maps to Delta Kilo 5 Whiskey Papa; Kilowatt, William and Paris are common-looking substitutes but not the ITU words for K, W and P.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA104": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DL1FLO maps D/L/F/L/O to Delta, Lima, Foxtrot, Lima, Oscar; London, Florida and Oslo are distractors rather than ITU code words.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA105": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DL4YBZ uses Yankee, Bravo and Zulu for Y, B and Z; Ypsilon, Baker and Zebra are the non-ITU traps in the answer choices.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA106": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DM4EAX spells M as Mike, E as Echo, A as Alfa and X as X-ray; Madagascar, Ecuador and Amerika are distractors outside the ITU alphabet.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA107": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DN9RO/p uses Romeo and Oscar for R and O, while '/' is spoken as Stroke before the portable suffix; Radio, Oslo and Nordpol are distractors.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA108": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DN9STV maps S/T/V to Sierra, Tango and Victor; Santiago, Texas and Vulcano are plausible-sounding but not ITU code words.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA109": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "DO9XJZ uses X-ray, Juliett and Zulu for X, J and Z; Xavier, Japan and Zebra are the distractor words.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
"BA110": {
"revision": 1,
"explanation": "The ITU spelling alphabet maps each letter to a fixed code word; digits remain digits and '/' is spoken as 'Stroke'. Using that fixed mapping makes the call sign unambiguous over radio.",
"revision": 2,
"explanation": "IG9/DL4HR starts India Golf and uses Stroke for '/', with Hotel and Romeo at the end; Italy, Guatemala and Honolulu are distractors.",
"source": "https://life.itu.int/radioclub/rr/ap14.pdf",
"confidence": 9
},
@@ -696,38 +696,38 @@
"confidence": 8
},
"BE204": {
"revision": 1,
"explanation": "For SSB phone the tone digit is omitted; clear copy gives R5 and an S-meter reading of 5 gives report 55.",
"revision": 2,
"explanation": "On the analogue S-meter, the needle indicates S5. For SSB phone the tone digit is omitted; clear copy gives R5, so the report is 55.",
"source": "https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sachgebiete/Telekommunikation/Unternehmen_Institutionen/Frequenzen/Amateurfunk/Fragenkatalog/BetriebVorschriftFragKlAuEId7830pdf.pdf?__blob=publicationFile",
"confidence": 8
},
"BE205": {
"revision": 1,
"explanation": "For SSB phone the tone digit is omitted; clear copy gives R5 and S9 gives report 59.",
"revision": 2,
"explanation": "On the analogue S-meter, the needle indicates S9. For SSB phone the tone digit is omitted; clear copy gives R5, so the report is 59.",
"source": "https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sachgebiete/Telekommunikation/Unternehmen_Institutionen/Frequenzen/Amateurfunk/Fragenkatalog/BetriebVorschriftFragKlAuEId7830pdf.pdf?__blob=publicationFile",
"confidence": 8
},
"BE206": {
"revision": 1,
"explanation": "For SSB phone the tone digit is omitted; clear copy plus an S9 reading 20 dB over S9 is reported as 59+20 dB.",
"revision": 2,
"explanation": "On the analogue S-meter, the needle is 20 dB over S9. For SSB phone the tone digit is omitted, so clear copy is reported as 59+20 dB.",
"source": "https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sachgebiete/Telekommunikation/Unternehmen_Institutionen/Frequenzen/Amateurfunk/Fragenkatalog/BetriebVorschriftFragKlAuEId7830pdf.pdf?__blob=publicationFile",
"confidence": 8
},
"BE207": {
"revision": 1,
"explanation": "For SSB phone the tone digit is omitted; clear copy gives R5 and the displayed S5 gives report 55.",
"revision": 2,
"explanation": "On the digital display, the shown signal level is S5. For SSB phone the tone digit is omitted; clear copy gives R5, so the report is 55.",
"source": "https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sachgebiete/Telekommunikation/Unternehmen_Institutionen/Frequenzen/Amateurfunk/Fragenkatalog/BetriebVorschriftFragKlAuEId7830pdf.pdf?__blob=publicationFile",
"confidence": 8
},
"BE208": {
"revision": 1,
"explanation": "For SSB phone the tone digit is omitted; clear copy gives R5 and the displayed S9 gives report 59.",
"revision": 2,
"explanation": "On the digital display, the shown signal level is S9. For SSB phone the tone digit is omitted; clear copy gives R5, so the report is 59.",
"source": "https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sachgebiete/Telekommunikation/Unternehmen_Institutionen/Frequenzen/Amateurfunk/Fragenkatalog/BetriebVorschriftFragKlAuEId7830pdf.pdf?__blob=publicationFile",
"confidence": 8
},
"BE209": {
"revision": 1,
"explanation": "For SSB phone the tone digit is omitted; clear copy plus a displayed value 20 dB over S9 is reported as 59+20 dB.",
"revision": 2,
"explanation": "On the digital display, the shown signal level is 20 dB over S9. For SSB phone the tone digit is omitted, so clear copy is reported as 59+20 dB.",
"source": "https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sachgebiete/Telekommunikation/Unternehmen_Institutionen/Frequenzen/Amateurfunk/Fragenkatalog/BetriebVorschriftFragKlAuEId7830pdf.pdf?__blob=publicationFile",
"confidence": 8
},
@@ -1218,9 +1218,9 @@
"confidence": 8
},
"VC101": {
"revision": 1,
"revision": 2,
"explanation": "The AFuG is the German statutory basis for who may participate in the amateur service and under what conditions.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__1.html",
"confidence": 10
},
"VC102": {
@@ -1236,9 +1236,9 @@
"confidence": 10
},
"VC104": {
"revision": 1,
"revision": 2,
"explanation": "AFuG assigns the law's administrative tasks to the Bundesnetzagentur.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__10.html",
"confidence": 9
},
"VC105": {
@@ -1266,9 +1266,9 @@
"confidence": 9
},
"VC109": {
"revision": 1,
"revision": 2,
"explanation": "AFuG permits amateurs with assigned call signs to operate commercial, home-built or modified transmitters on amateur frequencies.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__5.html",
"confidence": 9
},
"VC110": {
@@ -1320,33 +1320,33 @@
"confidence": 9
},
"VC118": {
"revision": 1,
"revision": 2,
"explanation": "AFuG requires amateur stations to meet EMC protection requirements so their operation remains compatible with other equipment.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__7.html",
"confidence": 9
},
"VC119": {
"revision": 1,
"revision": 2,
"explanation": "AFuG lets amateurs deviate from EMVG immunity requirements for their own station, meaning they choose their own station's immunity level.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__7.html",
"confidence": 9
},
"VC120": {
"revision": 1,
"revision": 2,
"explanation": "For self-built amateur equipment, AFuG allows the amateur to determine the station's immunity level instead of meeting ordinary EMVG immunity requirements.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__7.html",
"confidence": 9
},
"VC121": {
"revision": 1,
"revision": 2,
"explanation": "AFuG provides that BNetzA issues a site certificate on request; this is separate from the amateur-station display procedure.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__7.html",
"confidence": 9
},
"VC122": {
"revision": 1,
"revision": 2,
"explanation": "AFuG and AFuV enforcement powers allow BNetzA to restrict operation or order an amateur station taken out of service after violations.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__11.html",
"confidence": 9
},
"VC123": {
@@ -1356,15 +1356,15 @@
"confidence": 9
},
"VC124": {
"revision": 1,
"revision": 2,
"explanation": "AFuG treats operating without admission/call sign, commercial telecom service, and unauthorised third-party message relay as fineable offences.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__9.html",
"confidence": 9
},
"VC125": {
"revision": 1,
"revision": 2,
"explanation": "An unlawful station operation can be pursued by BNetzA as an administrative offence with a monetary fine.",
"source": "https://www.gesetze-im-internet.de/afug_1997/BJNR149400997.html",
"source": "https://www.gesetze-im-internet.de/afug_1997/__9.html",
"confidence": 9
},
"VD101": {
@@ -1602,8 +1602,8 @@
"confidence": 10
},
"VD407": {
"revision": 1,
"explanation": "The 40 m band is outside class E/N privileges for club-station use at class A power; only class A operators may use it there.",
"revision": 2,
"explanation": "AFuV Anlage 1 lists 7.000-7.200 MHz only in the class A column. A class A club-station call sign does not expand the operator's own licence privileges, so only class A operators may use 40 m there.",
"source": "https://www.gesetze-im-internet.de/afuv_2005/anlage_1.html",
"confidence": 10
},