Re: California fires: smart speakers and emergency alerts

[James Downs <egon () egon cc>]

On Thu, Jul 26, 2018 at 12:31:31PM -0500, Chris Boyd wrote:

> That’s about 1.85 meter wavelength, so a quarter wave antenna would be pretty large.  I’m sure the RF engineers can 
> come up with a way to listen effectively without a huge antenna.

For 162Mhz, a 1/4 wave antenna would have a vertical radiating element of around 17".
However, for receive only purposes, it's not necessary that the antenna be resonant. You can demonstrate this yourself 
with any FM radio and a paperclip.

Cheers,
-j