On 23/12/2021 12:38, Patrick wrote:

Would a similar V antenna, adjusted to the proper length, would be suitable for
ADS-B or even plane scatter (air scatter) ?

A collinear made from co-ax would be a better bet for 1.09 GHz ADS-B as it has
more gain. For example:

https://www.balarad.net/

For aircraft scatter use an antenna appropriate to the frequency you wish to
receive.

Cheers,
David
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