40m windom

40m delta loop - Building a 40m (7MHz) horizontal delta loop

LFA Antenna for 40m by YO2MBU Priority listing - LFA 2 elements Loop Antennafor 40m by YO2MBU

A Feasible Full Sized 40 Meter Beam - An antenna project for a beam antenna for 7 Mhz

40 Meter NVIS antenna - Near Vertical Incidence Skywave (NVIS) and the 40 meter Novice Sub-band.

Convert 40m 2-element to a Phased Drive Array - This presentation details the work of converting a 40m 2-element reversible beam antenna into a phase-driven type of array

Shortened Dipole for 40 Meter - A shortened dipole antenna for 40 meter band

End Fed Half Wave Antenna for 6 / 40 Meter - 6m to 40m EndFed Half Wave Antenna project produces an inexpensive, multiband, end fed HF antenna matchbox that is quick and easy to setup and use.

40m EFHW Antenna - End-Fed 40 meter half wave antenna

Legal Limit L-Match Tuner - The match is built around a 35 uH roller inductor and 350 pF variable capacitor and is used to convert a 40m loop antenne to match 80 and 160

Inverted L Antenna by VK1OD - This article describes a simple Inverted L antenna for the HF bands designed to work on 80m, 40m, 30m and 20m

80m 40m Vertical antenna - HF2 antenna, home made vertical antenna

W8HDU 40m Vertical design - Design of a 40 meter Vertical antenna

3 band portable wire antenna - A portable antenna for 40m, 30m and 20m bands

Home Made duplexer - Homemade UHF/440Mhz Amateur Radio Repeater Duplexer

440Mhz Interdigital Bandpass Filter - Homebrew Amateur Radio 440Mhz Interdigital Bandpass Filter

A simple 40m CW TX - An home made transmitter for 40m CW

80m glowbug using a 6V6  ^new - A QRP (ish) transmitter using a 6V6 final. This 80m glowbug is modelled on a 40m / 80m glowbug

CW transmitter on 40 m by VU2VWN  ^new - Vasantha VU2VWN VFO controlled 40m Tansmitter schematics

40 CW QRP Transmitter  ^new - Here is a easy to build and cheap CW transmitter using 40 m cristals. Power output is approximately 6 Watts for a supply voltage of 13.8 VDC

A Simple Superhet for 40M CW - An home made receiver for 7 MHz CW

40m CW Receiver  ^new - A 40m CW receiver for use with the companion 40m CW QRP transmitter by M0DGQ