KD6PAG - Projects

Various projects have been posted to USENET and can be found on various places on the Internet. It should be readily apparent which of these were posted via USENET. Others will be properly attributed. Unless otherwise noted, KD6PAG (or friends) have not actually built one of these, and would be interested in your feedback.

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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