stub

50MHz J-Pole Antenna  ^pop - Need a general purpose antenna on the magic band? The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarised antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.

EH antennas and CFA antenna - Many antennas function because of common mode currents, rather than working in spite of them. Two popular examples are CFA and EH antennas. Another recent example, appearing in Antennex's compact antenna articles, is a thick stub "vertical" with no counterpoise.

Portable QRP HF Antennas - Notes on the end-fed half-wave antenna, single-band stub-fed EFHW and a multiband EFHW antenna

AA3RL Transmission Line Calculator - Excel spreasheet that calculate virtually every transmission line parameter that one may need. Include Length conversions, Reactance and Length of Stubs

Antenna DIY Videos - DIY antennas videos chosen for content and quality.

Super J-Pole for 435MHz - The Super J Pole antenna is a co-linear vertical consisting of a number of half wave length vertical elements separated with half-wave length stubs (Tuning stub) feed with a folded matching stub by vk6ysf

Open Stub J-Pole Project - A 144/440 dual band open stub J-Pole Antenna project by NT1K

The Lattin 5 Band antenna  ^pop - The antenna was named for W4JRW who invented it and holds a patent on the basic principle and uses quarter wave stubs, 80, 40, 20, 15 and 10 meter bands

Cheap antenna to make from 160m - 6m  ^pop - The antenna is nothing more than a simple 2.4 metre square loop drawing pinned to the internal brick wall of the spare bedroom. Yep, thats right, the inside wall of the spare bedroom - ideal for flat dwellers, hotel rooms or whinging neighbours, The loop has a simple switched inductance at the top of the square loop and uses a simple coaxial stub to tune the antenna. An additional variable capacitor placed across the feedpoint can be used to fine tune the resonance of the antenna, by Andy G0FTD

Single-stub matching - Single-stub matching of transmission lines to loads A worked example

Beta Match - Hairpin, Stub affecting the element - The efficiency of Beta matched elements in antennas by K3BU

TOM'S TUBES - Amp tubes

Top Ten Devices - Automatic band decoder, six way antenna relay, band reject coaxial stubs and more

Nathan Stubblefield - Kentucky farmer invents wireless telephone! But was it radio? Facts and folklore about Nathan Stubblefield by Bob Lochte.

Yaesu FT-2000 Service Manual - Download the Yaesu FT-2000 service manual from filestube

Vacuum Tube Supply - Sell New old stock vacuum tubes at discount prices

XLZIZL by AC6LA - XLZIZL is an Excel application that analyzes the components of an antenna feed system, including transmission lines, stubs, baluns, and tuners. Calculations include impedance transforms, SWR and reflection coefficient, power loss, voltage and current standing waves, stress on tuner components, network attenuation (S21), and return loss Analysis results are available in worksheet format and in five different chart formats, including Smith charts.

Single coax filter - Coax Stubs for filters to help separate stations

Coaxial Stub Filters - Coaxial stub filters used at W7GJ

K2TR Coax Stub Filters - Multi transmitter filters

Coaxial Stub Filters - A range of easy-to-build RFI filters by John Regnault, G4SWX

K3NA stub design

Stub HF filter - Multi transmitter filters for HF Bands