40 meter

160 Meter Antennas at W8JI - 160-meter vertically polarized transmitting antennas center around this 200-foot tower

KE4UYP Linear loaded vertical antenna - This is a vertically and horizontally polarized antenna the Linear loaded 1/4 wave length vertical radiator introduces very little loss for 80 or 160 meters

The All Copper X-Beam for 17 Meters - WA2UGT X-beam antenna for 17 meters band

W5GI Mystery Antenna  ^pop - W5GI Mystery Antenna is a multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software. This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. It is approximately 100 feet long, can handle the legal limit, and is easy and inexpensive to build. It�s similar to a G5RV but a much better performer especially on 20 meters.

40 M. triangular full wave vertical loop

K4TX Delta Loop for 40 Meters - 40 Meter 2 Element Parasitic Delta Loop

Shorty Forty Antenna - Short dipole antenna for 40 meter ham band. Can be put up in the space required for a 20 meter dipole.

Sterba Curtain Antenna for 40 meters - A forty meters band sterba curtain antenna notes by KB8PGW

Easy Delta Loop for 50MHz - Build your own delta loop antenna for 6 meters band

YLRADIO - Full wave delta loop - This Delta Loop is a three-sided antenna suspended high in the air by vertical supports, such as tall evergreen trees. Recommended height is 40 feet or more at highest point, but higher is better.

K5UA 40 meter Phased Array - The intent of this site to share information about the design of a 40 meter horizontal phased array antenna.

End fed halfwave antenna and matching unit - One is an EFHWA for 20-40 meters, and the other is a matching unit for the antenna by n0lx

IZ1GJH/B 10 meter beacon - Active on 28.321,47 MHz in CW and Qrss3

YLRADIO Video clips - xperience 3 YLs having a 2 Meter QSO

Eliminate QRM from 6 meters band - The circuit described below will substantially reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequencey by TREVOR, G3ZYY

4-1000A Project HF Amplifier - An 80-10 meter band switchable HF amp using a 4-1000A

N4IP HF and 6 Meters amplifier - A solid state amplifier for HF and 6 meters band by N4IP

VE6FI 4-1000a amplifier - 15-160 meters HF power amplifier

2 KW Power Amplifier for 2 meters - 2 KW power amplifier for 144 MHz using the GU84B tube by Paul Chominski WA6PY

GS35b Amplifier for 50 Mhz - Picturs of my 6 meter Pa with a GS35b

DL5DBM 1KW amplifier for 144 Mhz - Pictures and circuit diagramm to build this power amplifier for 2 meters

6 meters power amplifier - A PDF file containing schematics and instructions to hombrew a power amplifier for 50 Mhz

OZ4HZ APRS tracker - The 4Hz tracker - APRS tracker with AT89C4051, now also with 5W transmitter onboard.

DL5DBM`s 2 meter Antenna preamp - Homebrew with CF300 DGMF with about .24 dBD gain

HF to 2 meters transverter - F5RDH project of a transverter, that can receive input in HF and convert output to 144 Mhz in french