Ultralight EFHW Antenna Winder KM4CFT Transformer

Lightweight, field-ready wire winder designed specifically for EFHW setups using the KM4CFT 20W transformer. Built for portability, simplicity, and real world deployment.

This design uses standard zip ties to securely mount your EFHW transformer directly to the winder, creating a compact all-in-one antenna package. The frame doubles as an anchor system, with multiple integrated attachment points for carabiners, guy lines, or cordage; ideal for rapid deployment in the field.

The open center section provides plenty of clearance for BNC coax connections, keeping everything clean and strain-free. The slim, skeletonized structure reduces weight while maintaining strength, making it well-suited for ultralight portable ops (POTA, SOTA, field kits, etc.).

A built-in slot accommodates a Velcro strap to keep your antenna wire neatly secured during transport.

Features:

• Designed for KM4CFT EFHW transformer form factor
• Zip-tie mounting system (no hardware required)
• Integrated tie-off points for ropes/carabiners
• Open center for BNC coax clearance
• Ultralight, low-profile design
• Velcro strap compatible for wire management

Print Settings:

• Minimum recommended material: PETG
• PLA may work but not recommended for long-term outdoor use
• No supports required
• Print flat for best strength

Notes:
Pictured with a portable QMX field kit for scale and use-case reference. Designed with real-world deployment in mind—quick setup, minimal bulk, and reliable performance in the field.