On Mon, 23 Jul 2007 17:10:00 GMT, "Jerry Martes"
wrote:


"amdx" wrote in message
. ..
I built the circuit from the page below.

http://www.atvinderby.co.uk/2.4Ghz_SWR_Meter.htm

The I get 0v out when held near my wireless router, if
I put it near the microwave oven, the high input impedance
meter bounces up and down between 7mv and 80mv and
everything in between.
I used a 1N416E diode and a 1500pf filter capacitor. The
tuning cap doesn't have any affect.
Should this circuit work? If so what could I be doing wrong?

Mike

Hi Mike

That device looks so interesting to me that I will build one.
Have you thought about the reason for using the Quad? It seems that
complexity of the Quad+Reflector with the tuning capacitor might be used for
some reason other than gain. A dipole over a piece of copper would be
about the same "gain".
And, since the output of this device never needs to connect to a coax, why
do you suppose the *right angle* BNC is used?
I'll learn something from this project.

Jerry


Hi Jerry,

You do point out a number of unnecessary elaborations. Tuning the
driven element (what in the world for?) necessarily invalidates any
director utility. Also, that humongous booger holding the director to
the driven element has got to be a huge detuner. Imagine it scaled
for a 20M Quad antenna.

The design looks like buttoning your fly to your shirt to keep your
pants from falling down.

73's
Richard Clark, KB7QHC