2 Meter J-pole from twin-lead
Make a 2 meter J-pole antenna from
300ohm twin-lead. [You will need to trim both the short and long
directions. See also a recent QST article, which may be a better
source, and also gets into dual-band operation.] This project has
appeared in several forms, and others may be included later. Note
there is some discussion as to which side the shield should be
connected to. I also recall WA6TVM [now SK] suggested in the local net,
the 'Antenna Forum', using a sleeve balun with one of these. While you
can cut one of these to have a decent SWR on both 2m and 440, the pattern
in vertical plane probably does not make this a good general-purpose
dual-band antenna, with the pattern on the 440 side mostly at 45 degrees
above the horizon (e.g. better for satellites than repeaters).
'Copper Cactus'
Build a 'Copper Cactus' tri-bander (N6JSX),
for those who like to work with copper pipe. (You'll need a torch to build
this one).
Modifying a Radio Shack FM beam for 2 meters
There are instructions for modifying a
Radio Shack FM yagi for operation on 2 meters. Includes
two sets of lengths and some discussion.
Phone flasher
Build a phone flasher. [Does anyone
have a better circuit?? -
KD6PAG
]
2m/70cm Diplexer
Build a simple 2m/70cm diplexer (from USENET via Mirror of ARRL FTP archive). [You will need to use good quality
capacitors for the 440 side (surface mount or trimmers ("Johnson" type)
intended for UHF and above) and probably want to build it on something that
will act as a ground plane. You may want to find the relevant QST
article before building it.]
Voice Keyer
Build a "voice keyer" using the Radio Shack digital recorder IC. --
N2VYU
Converting cheap 49 MHz walkie-talkies to 6 Meters
Periodically, in the USENET news, there is some discussion about converting
49 MHZ walkie-talkies to 6 meters. [Is
there better data elsewhere? -
KD6PAG
]
L pads and T pads
This is an easy one, but how many of us get this wrong, or don't know
where to look? Here's a brief posting on constructing
L pads and T pads (e.g. variable attenuators with constant input
and/or output impedence).
Folded Monopole for 440 MHz
Here's a simple low-clearance antenna that
i'm trying out on my van that you can build for less than $5.
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