Portable J-Poll antenna
Project
Build the 2 meter J-Pole portable Antenna.
Perfect for emergency communications.
Click here to see J-Poll construction
Maxon Radio Conversions
The Maxon SM-3010 is a 6 or 8 channel commercial VHF radio
available on the surplus market. It's normal used in
public service but easily converted to Amateur Radio
service.
Click links for more information:
Convert
Maxon 3010
Convert
Maxon 4010
Maxon
microphone pin-out
Two Tone Generator/Door Bell Project
This is a fun
project that takes kit bilding a little further. It has
you soldering on a ready made printer circut board.
The best part of this project is you learn about
components along with advancing your soldering
techenquice. This project has a good chance of
working right away and if it don't, trouble shooting is
how you really learn. So lets dive in and see where
we are going.
Click
here for more
project information
Pine Cone Christmas Tree
This is a fun
project that allows you to build a small blinking
Christmas tree out of a Pine Cone and a few electronic
parts. Besides having fun, you will learn about
LED's, resistors and soldering. Not to mention allowing
your imagination to run wild. The Pine Cone forms
the body of the tree and we mount a bright white steady
LED at the top. The other LED's are blinking types that
randomly change between red, green and blue. They
are also bright LED's but we cut down a little on the
brightness for better affect and also to allow the 9 volt
battery to last longer.
Click
here for more
project information
The vertex 7000
repeater might be a fine repeater, but it has difficulty
with PL tones. There is an option that says it will
allow the transmitter to be locked unless it receives a
carrier and PL tone. Sounds perfect to me to allow for
normal PL operations. Well, it does sort of work.
But has a bad habit of locking out people in conversations
because it appears it take the carrier to be inactive for
3 seconds before it will unlock the transmitter.
That's crazy and drove me nuts.
To get around this
problem I came up with this hardware solution that seems
to work great. It involves a off box PL detector and
some digital logic to make sure we don't insert a COR
unless we have both PL and COR from the repeater receiver.
Once we have BOTH we insert COR to the controller and away
we go. I also took the opportunity to add led's on
the COR, PL and PTT lines. This really helps in trouble
shooting. Our controller happens to be a CAT-1000
and I was able to hijack the needed leads from the H4
connector. Click the link for a schematic of this
solution.
Click for Vertex 7000 -- CAT-1000 PL interface solution
|
