Topband: Adding 80m to 160m receive array

[Richard (Rick) Karlquist]

On 7/4/2020 9:21 AM, gjpurden at gmail.com wrote:
> For those using uses short, umbrella wire loaded verticals, I've posted an
> article on adding 80m to a 160m array. It can be viewed or downloaded at:
> https://w6ayc.com/w6ayc-adding-80m-to-a-160m-receive-vertical/.

> 73           Joe         W6AYC
> 

At the top of page 2, 2:1 VSWR is given as the bandwidth criterion.
That is somewhat irrelevant for phased arrays.  In that case, the 
critical issue is to have phase (especially) and amplitude tracking 
between elements in the array. It would be a lot easier to do that on 2 
bands by simply using relays to select individual networks for each 
band, that could be optimized for each band, without interaction between 
the tuning adjustments. This would also allow having a different
series resistor for each band. The control voltage could run down the 
center conductor of the feedline.

73
Rick N6RK