[Laser] daylight receiver

[J. Forster]

A long sunshade will help a lot also. What matters is the ratio of signal to
background. A long sunshade (with one or more baffles) will reduce the background.

-John

TWOSIG at aol.com wrote:

> Well Andy, how far do you want to talk?
>
> My Ramsey units, which use a phototransistor and a gain of two work several
> hundred feet in daylight.  The active filter probably is not needed on the
> receive side unless you need to cutout the hum from street lights  ( Oh, right.
> The daylight will turn of the streetlights.)
>
> I think what you need to look at is not the detector, but the optics to
> minimize the stray light paths.
>
> Hope this helps.
>
> James
> N5GUI
>