Building a QRO 1/49 transformer for end fed antenna.
Updated: Jul 7, 2021
- 3 cores Amidon 240-43
- copper wire 1.8 mm diameter
- PTFE tube with 2 mm internal diameter and 3 mm outside diameter
- for use > 7MHz, a compensation capacitor is required.It must withstand high
voltages depending on the power used.