NJQRP Sniffer
The Kit is no longer available, but do not let that stop you from building it!
KB9JJA's
version of the NJQRP Sniffer
A Tunable, Multiband Field Strength Meter Kit
Here is a link to NJQRP's
version of the sniffer.
Link to the manual (Local
Copy)
I
made a few modifications to the sniffer. First I did not use
manhaten style construction. It was built on a radio shack proto
board. I also wanted the ability to disable the tuned front end on
the unit. I added a switch to disconect the tuned circuit to the
left of the antenna. This allows the sniffer to be very broad
banded. I have found that in use, I will start off with the tuned
circuit switched out, adjust the meter, then switch the tuned
circuit back in, and make final adjustments. The meter also works
fine for VHF and UHF with the tuned front end switched
out.
This turned out to be a nice little project. It is sensitive enough
to deflect the meter with less than a watt of power going to my
outside antenna. I leave it on at the station when I am operating,
as it makes a good indicator of RF getting out to the
antenna.
The meter face and case where designed with Corel Draw, and Printed
on Inkjet receptive vinyl.
73's KB9JJA