Examples
Examples
Try the starting example
- Frequency (MHz)
- 100
- Supplied shortening factor
- 0.95
- Initial total half-wave dipole length (m)
- 1.424014
- Initial arm length (m)
- 0.712007
Try another scenario
- Frequency (MHz)
- 110.00000000000001
- Supplied shortening factor
- 0.95
- Initial total half-wave dipole length (m)
- 1.294558
- Initial arm length (m)
- 0.647279
Calculation method
Calculation method
Initial total half-wave dipole length (m)
c × shortening factor/(2 frequency).
Initial arm length (m)
Half total dipole length; tuning is still required.
Symbols and units
- a
- Frequency (MHz)
- b
- Supplied shortening factor
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Frequency, supplied shortening factor. Returns Initial geometric element length. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Frequency (MHz): minimum 1e-12, maximum 1000000000000.0. Supplied shortening factor: minimum 1e-12, maximum 1.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.