[TowerTalk] Lightning Bolt Quad

[denis coolican]

This four element Lightning Bolt Quad covers 20, 17, 15, 12 and 10 meters. It is fed by a common balum. (one input PL259 and 5 output pairs of conductors)

Does anyone know what type of balum this is and what would be the replacement for it?

I imagine the driven elements for each band has an impedance of about 80 to 100 ohms.  The feed into the balum is 50 ohms.

If a person provides a 2:1 balum for each feed, would the unused balums be terminated in 50 ohms or left open?

Any more thoughts on this antenna?

Denis Ve6aq