This Balun Chokes
Jim (K9YC) Brown’s toroid winding recipes provide a superb RF choke balun for 30-10m using RG316 and a #43 toroid.
John S. Huggins
Hatteras Ham Shack
I took the asymmetrical hatted vertical dipole to Hatteras beach to activate NA-067. I wasn’t very successful, but made a couple QSOs. Despite mixed results, the setting was spectacular. The vertical dipole worked.
Vertical Dipole at Lighthouse
The asymmetrical hatted vertical dipole (AHVD) provides a quick setup HF antenna at Hatteras lighthouse.
Build this Vertical Portable HF Antenna
The Asymmetrical Hatted Vertical Dipole (AHVD) prototype is an easy to build, portable alternative to other freestanding vertical HF antennas such as the Buddipole.
Asy Hat Vertical Dipole
We re-introduce the theory and origins of Cebik’s (W4RNL) Asymmetrical Hatted Vertical Dipole (AHVD) antenna with the hope to facilitate a vertical polarization portable 20-10m aerial for portable operations.
40m Mastless NVIS Antenna
Yet another 40m Cloud Burner design featuring a folded dipole driven element plus one reflector wire to facilitate 40m NVIS contacts without need of a tall mast. The design uses electric fence posts for support and needs no balun.
40m Loop Ground Wire Test
In the name of science I cut the wire laying on the ground underneath my 40m fullwave horizontal loop to see what would happen.
LiFePO4 – The New Normal?
The Lithium Iron Phosphate battery chemistry is my replacement of choice for my old 7AH lead acid gel cells.
Of Horses and Hams
One example of how amateur radio provides safety and service to the pubic providing otherwise impossible communications using the “Magic Band.”
Wideband 80m Dipole
A 1/4 wavelength of 75 ohm coax inline with a full wavelength of 50 ohm coax is all one needs to make a simple 80m dipole become a wideband dipole antenna.
Watch for Wires
Video of tree against power line reminds us why we should always consider the falling arc, pardon the pun, of any antenna structure.
Honda Generator Hour Meter
Maintain your Honda EU2000i (or any) generator on schedule with the addition of an aftermarket hour meter and bracket.
Vehicular Power Bus – Hell on Earth?
Connecting a piece of gear to an automotive bus is a terrible thing to do… unless the gear manufacturer understands the perils that await including spikes, surges and dips. Fortunately, military specifications consolidate decades of observations to help us understand the vehicle power bus.
Superbowl HDTV Antenna
Build the venerable Hoverman TV antenna and watch digital broadcast high definition HDTV television this weekend. This version of a HDTV antenna uses amateur radio antenna building techniques to make a lightweight structure.
First SOTA Activation – Using VHF FM
My first journey to the mountains as SOTA activator was a success using minimalist VHF FM gear.
LOTW Import gets around ADIF Mode Limits
Logbook of the World accepts non-ADIF-compliant mode values to ensure compatibility with contests like Field Day.
SWR of Several Mobile Antennas
I had occasion to test four popular amateur radio mobile antennas. Here are the results of SWR and Return Loss of a Diamond SG7900ANMO, Larsen NMO 2/70, Cushcraft CS-270M and Laird QW144.
For Sale Heathkit SB-102 with HB-23-A PS/Speaker
I am selling this radio for a friend. He is the original owner and builder. It is a Heathkit SB-102 transceiver with HB-23-A external power supply with speaker. This includes the original two-pin microphone. This thing is old… very very old. It does power up as shown in the photographs below. I did attach my … Read more
Assemble the 6m LFA Yagi
This final installment about the 6m LFA Yagi Antenna shows the technique to hold copper pipes to the boom using home center PVC plumbing materials.
Cutting Copper for 6m LFA Yagi
Here is a step by step photo album showing how I prepared home center copper pipe for use in a three element Loop-Fed-Array Yagi-Uda antenna (aka LFA Yagi Antenna).
Copper 6m Coplanar LFA Yagi-Uda
The Coplanar Loop Fed Array (LFA) Yagi-Uda design from G0KSC provides an excellent design foundation for an all copper version of a 3 element 6m balunless beam with superior front to back performance. Shown are comparisons between model simulations and prototype measurements.
Coplanar Loop Fed Array LFA Yagi-Uda Antenna
The clever application of the folded dipole loop, computer science iteration techniques and NEC simulation to Yagi-Uda design results in a panoply of practical planar Loop Fed Array, LFA Yagi antenna recipes.
Improving the Super-J
The traditional collinear J-Pole, aka Super-J, improves the basic J-Pole. Are further improvements possible? By replacing the phasing stub with a simple coil, the answer is yes. The result is the Collinear J-Pole.
Stony Man AT Golden Packet 2012
Results from station 6 of the Appalachian Trail Golden Packet attempt from Stony Man mountain.