Key facts
- Manuals
- 1
- Languages
- NL
- Last added
- 2026-10-01
Featured Neil Heckt manuals
Neil Heckt DFD4 Frequency Counter User Manual
The DFD4 is a programmable frequency counter for HF and VHF/UHF bands, designed by Neil Heckt. It uses three ICs, a dot‑matrix LC display and can be powered from a 9 V battery for portable use or installed in a receiver.
The manual provides detailed specifications, component lists, step‑by‑step assembly procedures, testing methods, calibration instructions and optional features such as background‑lit display and offset adjustment. This manual is written in Dutch.
Covers: Specificaties · Bouwbeschrijving · Componenten opstelling · Testen van de DFD4 · Afstellen van de frequentie teller · Onderdelenlijst
Latest Neil Heckt manuals
Neil Heckt DFD4 Frequency Counter User Manual
User Manual 8 pages · 779 KB · NLDIY guide for building and using the DFD4 programmable frequency counter with specifications and assembly instructions.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in Neil Heckt manuals
How is the frequency offset adjusted?
The offset is set with three multi‑turn potentiometers (FINE, MEDIUM, COARSE) and the jumper J1 selects positive or negative offset.
What power source can be used for portable operation?
A 9 V battery can power the DFD4 for at least eight hours without display back‑lighting.