R1FJ

• Antenna Building - Sourcing Aluminium Stock
• Antenna Building - Sourcing Pipe Clamps
• Antenna Building - Sourcing U-Bolts
• Antenna Building - Sourcing Stainless H'ware
• Antenna Building - Galvanic Corrosion
• Antenna Building - Preventing Galling
• Antenna Building - Making Super Sturdy Right-Angle Mounting Plates for Moxons
• Antenna Building - Quads - Securing Loop Wires Effectively to Spreader Ends

• 75ohm 1/4 wave Matching Transformer
• 28 to 50ohm Matching Transformer
• 12.5 to 50ohm Matching Transformer
• Ferrite Core 1:1 Choke Balun
• Ferrite Core 4:1 Balun Transformer
• Ferrite Core 9:1 Unun Transformer and End-Fed Sloping Wire Antenna for 160-10m
• Sourcing Cores for Baluns & Transformers
• Limitations of Coaxial Air-Coiled Chokes
• A Simple 6m Feedpoint Choke Using RG Mini8
• A Gamma Match - Match 'Z' to 50 ohms

• 50 and 75 Ohm Coaxial Cables Busted!
• A Really Cheap Alternative to 'Coax-Seal'

• LB Cebik [W4RNL] - The Antenna Guru's Guru!
• EZNEC - Friend or Foe?
• EZNEC Files to Download
• Download EZNEC Pro/2+ from W7EL
• EZNEC Tapered Wire Modelling - How to Build Accurate Delta Loops that Reflect Your Model
• AN-SOF V7 vs EZNEC Pro/2+ 'Model' vs
'Live Build' - Which is the more accurate?
• Why the old formula 1005/freq sometimes doesn't work for loop antennas.

• A Beefed-Up' GM3SEK Mains Filter

• NEW: An XLR Switch to Switch 1 XLR Input to Either of 2 XLR Outputs With RFI Filtering

• NEW: The Ultimate 'L-Match' ATU based on an original design by Frank J. Dziurda, K7SFN. A homebrew project going into 2024

• HF2500 Amp - PSU Strip Down
• HF2500 Amp - Plate Voltage Board Rebuild
• Home-build: 5Kw QRO 'Gainmaster' copy
• Home-build: 11m 5-Element OWA Yagi
• Home-build: 17m 2-Element Delta Loop
• Home-build: 6m 6-Element Delta Loop
• Home-build: 6m 4-Element Delta Loop
• Home-build: 10m 2-Element Delta Loop
Completed articles will be moved from the above section when finalised

• As Simple as it Gets - Build a 2m VHF Dipole - Ideal for Novices
• Wide-band a 3-Element Yagi
• Build a 6m 2-Element Yagi
• A 6m 3 Ele Yagi Built Two Ways
• Matching with a Hairpin Match
• Match a Single Element Delta
• 0.66 v/f Coaxial Dipoles: There's no Such Thing as a Free Lunch
• A Triple 5/8th 2m Collinear. Ditch that Dreadful VHF 'White-Stick'

• A Lightweight 3 Ele 15m Yagi
• A SIRIO Gainmaster on Steroids
• 10 Element OWL VHF 2m Yagi
• G7FEK Multiband Wire for DX
• A 7 Element LPA for BandII FM
• A 5 Band Monster Quad by KG6B
• A 7 Elem't Vertical 2m OWA Yagi
• A 5 Element 2m 28-Ohm Yagi
• An 8 Element 2m OWA Vertical Yagi for extreme fringe areas
• A 10/11m 3 Element Short Boom Super Lightweight Yagi

• The G0UIH 10m 'Needlebender'. An 8 ele no-compromise 10m Yagi that'll cause a riot on the band!!!

• NEW: A 20/17/15m 10 element Yagi with a single feedline. Our take on the Optibeam OB10-3W

• NEW: A Wideband 10/11M long boom high gain 6 ele OP-DES

• Analysis: All-band Delta 80-2m
- Full build data and feed options
• Build a 2 Element Delta for 15m
• Build a 4 Element Delta for 11m
• A Dual Band 10 and 15m High Performance Delta Loop
• A 2 Element Delta Loop for the 4m [70MHz] Band

• NEW: A 5 Element Super Heavy Duty Delta Loop for the 11m Band - A 'Vortex Antennas' Original