Topband: Automatic Switching on 80/160 Vertical

[DAVID CUTHBERT]

Tom Rauch said:


You could use a complex trap like Butternut uses (which
would have higher efficiency with a coil, rather than a
distributed inductor like a linear loading stub), but I'd be
more inclined to just use a regular trap at the right
spot....maybe right below a capacitance hat.

Dave says: 

Tom has a great idea! This would provide full performance on 80 and the best performance from a 66' vertical on 160 meters. Automatic band switching and great performance. Robert, If this sounds good I will be glad to calculate a suitable trap/top hat for you. But if you still want the linear loading I will calculate a suitable Butternut-style cap and linear loading that will do the job.

   Dave WX7G