VX-7R modification
Mars Cap and freeband modification for the VX-7R transceiver
Category Archives: Homebrew
J-pole Antenna Revisited Yet Again
I recently had a conversation on the radio with another Ham who had built a 6 Meter wavelength band “J” antenna. He was getting some rather strange performance from this design, so I asked him where or how he had come up with the antennas dimensions. He referenced an Internet web page to me where
G5RV Antenna
This article reports the results of searches performed on the G5RV antenna. As stated in several articles concerning the G5RV antenna an specially in old French books written by R.A. Raffin, F3AV and R. Piat, F3YX and more recently. Unfortunately years have passed and I only kept in memory that at the bottom of the
80m Loop EZNEC Analysis
Antenna data, and design note for this horizontal loop antenna resonating on 80 Meters by K0ZE
VHF/UHF Quad Antenna
The information in this article has come from many amateur sources, the most notable was from WA6TEY (sk 1985) Ray Frost, who was a pioneer of VHF Quad designs and one of the best Southern California Transmitter Hunters of the 1980’s. Ray built hundreds two meter quads in single and paired configurations as well as
The Inverted V antenna
Dimensions for the inverted V antenna from 160 to 2 meters by N6JSX
IC-706 modifications
This modification has been found on the net. Please use at your own risk. WARNING: Improperly performed modifications can severely damage your adio. I have performed these modifications successfully, but I offer no guarantee or warranty for them. Proceed at your own risk. TOOLS NEEDED: 1) Small philips-head screwdriver 2) Tweezers 3) Magnifying glass 4)
Mirrored J-pole
The mirror-image J-Pole is very easy to construct and requires only two T-Fittings plus a length of copper pipe.To visualize the antenna, one must only picture a 3 half-wavelength vertical and a 2 quarter-wavelength vertical positioned a few inches away from and centered on the the tall vertical. Construction of the mirror-image J-Pole is accomplished
Push pull 2m amplifier
Two 4CX1000A’s in grounded-screen push-pull – an amplifier that did not work. Describing this amplifier may seem a really silly thing to do, as it never worked well. However, someone else might learn from our mistakes, or even perhaps someone can tell us why it did not work. Background.A friend Paul G8WYI and I were
PC-programming cable for Kenwood TH-G71A / TH-F6A
I wanted to make my own cable to program my Kenwood TH-G71A ham radio with a PC, but the owner’s manual simply did not show the pinout needed for the connector plugs. I searched the web but was not able to find this information but I did discover that several other radios used an RS-232-to-logic