Democratic Peoples Republic of Korea [DPRK] – North Korea. ‘The one that everyone wants!‘
P5/4L4FN
P5
Resources, Files and Antenna Construction Library
A lightweight 10M2 2 Element 10m Delta Loop – build it! – Coming in a later update.
Antenna Building Resources
• 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
• 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
‘Build Me’ – Baluns and Matching Devices
• 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
• 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
Coaxial Cable and RF Connectors
Antenna Modelling
• 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.
• 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.
Self Build Shack Projects
Other Projects and articles
• NEW: Symetrix 528E Audio Processor Overhaul with new Premium Capacitors
• NEW: Don't use FT8? - Then you're most likely missing out on some serious 'DX'
• NEW: FT8 - Getting in the log of the 'DX'
• NEW - AUTUMN 2025:'The quest to achieve 'DXCC Honor Roll'. The RSGB's RADCOM runs a 3 page special feature on Steve G0UIH with a 'DXCC Deep Dive Article' - Oct 2025 Edition
• NEW 2025 - G0UIH QSL COLLECTION:
'A 33-year journey to achieve DXCC #1 Top Honor Roll - See the many rare cards here.
• NEW 2026 - IC-706MKIIG - Linking up with a SignaLink USB Interface for Digimodes
'Don't try to use the 13 pin ACC2 socket on the radio - you'll get problems. See what I found out and help in curing the problem.
• NEW: June 2026: Command Technologies HF-2500 Stripdown and Rebuild.
Probably the most comprehensive information online today.
PSU Strip Down and Electrolytic CAP Replacements, Plate Voltage Board Rebuild, Bandswitch Repair and full refurbishment with various complimentary images and videos.
• NEW: July 2026: A Dead Icom IC-775 DSP Brought back to life. SMPS Issues.
A freind's Icom IC-775 DSP is dead and won't switch on. Time to delve in and find out why.
• NEW: July 2026: Homebrew 400w Amp PSU Rebuild: 2 x 813 maybe built by GM3UCI.
A friend's 400w desktop amp PSU board needs reconditioning. The stripdown & rebuild here
• NEW: Oct 2026: A Cheap handy useful multimeter that won't break the bank.
At only £35, this Infurider YF-770D handheld is a useful addition to the workshop
PA Hire –
Disclaimer and Use of this Site
Antenna Projects for The Home Constructor
A Lightweight 10M6 6 element OWA Yagi – Click below to see how to build it
Antenna Related Projects
• 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 5 ele OWA Yagi for 10 & 11m
• A 10/11m 3 Element Short Boom Super Lightweight Yagi
• 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 5 ele OWA Yagi for 10 & 11m
• A 10/11m 3 Element Short Boom Super Lightweight Yagi
• Updated March 2026: • Updated March 2026: • NEW: A Wideband 10/11M long boom high gain 6 ele OP-DES
• NEW - Aug 2025: A 13 Element 2m Antenna for Extreme Outer Fringe Areas
• NEW - Jan 2026: A Short 2 Element 30m and 2 Element 40m High 'Q' Coil Loaded Yagi
• NEW - Sept 2026: A 10/11/12 Monoband Interlaced and OWA Combined Yagi that covers all 3 Bands on a 7.5m boom. Gives 5 Element Monoband Performance on 12m!
The G0UIH 10m 'Needlebender'. An 8 ele no-compromise 10m Yagi that'll cause a riot on the band!!!
A 20/17/15m 10 element Yagi with a single feedline. Our take on the Optibeam OB10-3W
Premier Delta Loop Projects
• 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
- 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
VHF and UHF Antenna Design
Solar-Terrestrial Data