Ham Engineering
ユーティリティ
無料
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
評価とレビュー
- このアプリは、概要を表示するには評価件数やレビュー件数が不十分です。
Enter the frequency once.
- Antennas -> Calc now has a single Design Frequency at the top of the page that fills in every antenna calculator below it: half-wave dipole, quarter-wave and 5/8-wave verticals, ground-plane radials, end-fed half-wave, random wire, full-wave loop and the 3-element Yagi. Pick a band to load its center frequency, or type any frequency yourself.
- The band edges are shown under the field, so you can nudge the frequency to the part of the band you actually operate instead of accepting the middle of it. This matters most on the wide bands - on 160 m the band centre is over two metres of wire away from where a CW dipole should be cut.
- Each calculator keeps its own frequency field, so you can still tweak a single antenna without disturbing the rest.
- The dipole k-factor and the random-wire length stay per-panel, because they are not frequency.
- Your chosen band and frequency are remembered between sessions.
73 de A41UX
デベロッパである“Yousif AL Balushi”は、アプリのプライバシー慣行に、以下のデータの取り扱いが含まれる可能性があることを示しました。詳しくは、 デベロッパプライバシーポリシー を参照してください。
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情報
- 販売元
- Yousif AL Balushi
- サイズ
- 22 MB
- カテゴリ
- ユーティリティ
- 互換性
iOS 13.0以降が必要です。
- iPhone
iOS 13.0以降が必要です。 - iPad
iPadOS 13.0以降が必要です。 - iPod touch
iOS 13.0以降が必要です。
- iPhone
- 言語
- 英語
- 年齢制限
4+
- 4+
- 著作権
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