[FoxHunt] active atten

[Bob Rex]

Mike, I would be interested in seeing what you came up with.  I developed 
one myself from a basic circuit off one of the sites on the web( Homing In 
I think).  I added a circuit that allows activation by a push button.  The 
attenuator will run for about 2 minutes then turn off automatically.  It 
seems every time I went to use the one I have, the power switch was 
inadvertently turned on resulting in a dead battery.  Our club is 
considering a project to build this or a similar unit.  One of our members 
is doing a PC board layout to ease construction.

We held a workshop on Saturday and had 29 in attendance.  It went great and 
really piqued the interest of many hams not presently active in fox 
hunting.  I think many of the veterans learned a thing or two.

Visit our web page at http://members.bellatlantic.net/~vze26tzn/

Bob, K3DBD  k3dbd@arrl.net



At 07:09 PM 3/24/2002 -0800, you wrote:

>I have developed an 'improved' active attenuator for our local club.
>It is simple to build, using one CMOS IC, a crystal, single diode mixer 
>and a pot.
>The improvement is mainly the addition of a 2 Hz oscillator gating the 1 MHz
>oscillator.  This really helps to distinguish between an unmodulated 
>signal and the
>noise floor in an FM receiver.
>
>I could post it if there is much interest.