Building a 2:1 BALUN For Delta Loop Antennas.

Delta loop antennas are awesome when you feed them well, either using a quarter-wave length of 75-Ohm coax or a 2:1 transformer, which I am building in this video. It works best from 80 to 15m, but will go up to 6m in a pinch as you will see being used with my Racal VRM-5080 on 6m FM. Update: Some people say this is a 4:1 and using the wrong core... Any experts here to comment? The antenna analyser shows 43 Ohms using a 100 Ohm resistor.
BALUN case: https://www.thingiverse.com/thing:486...
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