Ham Engineering vs Morse Code

Ham Engineering is the engineering bench for amateur radio — antenna and feedline maths, circuit design, propagation and a deep reference library, all completely offline. No account, no ads, no tracking, and not a single network call. ANTENNAS • Half-wave dipole with adjustable k (velocity) factor, quarter-wave and 5/8-wave verticals, ground-plane radials, end-fed half-wave, random wire, full-wave loop and a 3-element Yagi estimator • Matching: L-network, Pi-network, quarter-wave transformer, balun/unun ratios and stub matching • Antenna Lab — a live elevation radiation-pattern plot with directivity, realized gain, takeoff angle, beamwidth, front-to-back, mismatch loss, feedline loss and system gain, each explained • Grid Compass that rotates with your phone, showing beam bearing and distance from your grid to a target grid • Antenna gallery — every common type drawn as scalable vector art, with what it is, what it is for and what to watch out for FEEDLINES & RF • Coax loss by cable type, frequency and run length; velocity-factor electrical length • SWR from forward/reflected power, plus return loss and mismatch loss • Antenna A/B comparison and receiver noise-floor estimation • RF power conversions: dBm, watts, ERP and EIRP • Propagation: free-space path loss, radio horizon and Fresnel-zone clearance • NanoVNA and tinySA quick-start guides, and a coax + connector gallery CIRCUITS • Ohm's law, series/parallel resistance, voltage dividers, RC and RL time constants • Reactance, LC resonance, Q and bandwidth, stored energy • RC and LC filter cutoffs, a constant-k Pi/T filter designer, a bandpass/notch calculator and a Butterworth low-pass designer • Resistor, capacitor and inductor code decoders, an AWG wire table and a 555 timer calculator • A live RLC resonance lab and a 50-part component gallery REFERENCE & EXTRA • Filterable amateur band plan for ITU Regions 1, 2 and 3 • Unit converters including watts, dBm and microvolts • Comparison tables for coax, connectors, antennas and batteries • Tools-and-gear and rig-controls galleries — what every knob and button is called across manufacturers • Maidenhead grid tools and great-circle beam headings • 300+ searchable tips, 40+ formulas, a rich glossary and a constants reference • Curated external links to major retailers, brands and references BUILT FOR THE BENCH • Nearly 200 illustrations drawn as scalable vector art — nothing to download, everything sharp at any size • Works fully offline. The app makes no network calls at all • Export any panel or diagram as a theme-aware image to share or file • An (i) explanation on every panel — this is a tool and a guide, not a quiz • Light and dark themes, adjustable font size, weekly tips and in-app version history • Your callsign, grid and email stay on your device and are never transmitted PERFECT FOR • Licensed operators designing, building and tuning antennas • Anyone putting up a first dipole or vertical and wanting the numbers right • Homebrewers and kit builders working with filters, matching and components • SWLs and newcomers who want the reference material without the exam drill • Club elmers and anyone teaching antenna and RF fundamentals PRIVACY • Your callsign, grid and email are stored only on your device. • No account, no sign-up, no ads, no analytics SDKs, no advertising ID and no tracking of any kind. 73 de A41UX Yousuf AL Balushi — Unixeer, Oman

Most Morse code apps hand you a table of 26 patterns and wish you luck. Morse Map hands you the structure underneath the table. Morse code isn't a list. It's a decision tree. From any point, a dot takes one branch and a dash takes the other. E is one dot from the start. A is E plus a dash. R is A plus a dot. Nobody memorises 26 unrelated patterns — they learn one map and walk it. This app draws that map, and lights up where you are on it. SEE THE CODE, DON'T MEMORISE IT Two ideas make the diagram readable at a glance. Every node is drawn as the symbol that reaches it — a circle for a dot, a long bar for a dash. Read the shapes along a path and you have just read the code. No legend. No lookup. And depth runs left to right, so a path reads in the same direction as time. The route to J is dot dash dash dash, which is exactly what J sounds like. The tree is the waveform. Key a dot and a packet of light travels the trace into the next node. The path stays lit while the rest of the map dims, and the two branches you could take next are marked — so you are always looking at the one decision in front of you, not the whole alphabet. DECODE Tap separate dot and dash keys, or switch to a real straight key where the length of your press decides the symbol, with a live indicator showing when you cross into dash territory. A pause finishes the character, with a ring closing around the live node so the timing is visible rather than guessed. Prefer to be deliberate? Turn it off and press Enter yourself. Tap any node to jump there and hear it — exploring is free, and nothing is typed until you ask. Undo works one element at a time, which is what you need most when you are new. SEND — INCLUDING BY LIGHT Type a message and transmit it as genuine Morse, with correct element lengths and correct gaps, on four channels at once: • Sound — a real keyed sidetone. • Light — flash the message out of your camera's torch, exactly the way a signal lamp works. Point it across a room, a field, or a valley and it is a working Morse transmitter. • Haptics — feel each element at its true length. • The map — watch the tree walk your message as it goes. Copy the encoded string out to share it as text. TRAIN Practice, so the map eventually stops being something you look at. • The Koch method — start with two characters at full speed and earn the next one at 90% accuracy. This is the method that works. Learning slowly and speeding up later just means un-learning a rhythm. • Listen: hear a character, name it. • Key it: see a character, send it on the tree. • Per-character mastery, experience levels and daily streaks. CODEX All 62 characters — 26 letters, 10 numbers, 18 punctuation marks and 8 procedural signals — each with its code, its spoken rhythm (di-dah-dah-dah), where it sits in the tree, and how well you know it. BUILT PROPERLY • Real PARIS-standard timing, adjustable from 5 to 30 wpm. • Farnsworth spacing: keep characters crisp while the gaps stretch. • A true gated sidetone oscillator with ramped edges, not clicky samples — tune it from 300 to 1000 Hz. • Core Haptics, so a dash feels three times as long as a dot. • Mixes with your music instead of silencing it. • VoiceOver support, including a live spoken description of your path through the tree. Reduce Motion respected. NO ACCOUNT. NO INTERNET. NO DATA. There is no networking in this app at all. No sign-up, no ads, no analytics, no tracking, no third-party code. Your settings and progress live on your device and go nowhere. It works the same in a basement, on a plane, or off-grid — which, given the subject, felt like the point. Whether you are studying for an amateur radio licence, learning CW for the love of it, or you just want to know what the flashing light in the film actually said — start with the map.