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How-To: Set up an HF portable radio while hiking
Added: 5th January 2012
Posted By: w4djd
Views: 270
Comments: 0

Fall is the perfect time for hiking, it\'s not too hot and not too cold. Last weekend I took a day trip to hike up High Mountain in New Jersey and activate SOTA summit W2/NJ008. It\'s really easy to set up an HF portable radio and not a whole lot to carry up the mountain. This...

Tags: HAM radio makezine diana eng
Ham Radio MFJ-259B Antenna Analyzer Repair
Added: 9th November 2011
Posted By: w4djd
Views: 250
Comments: 0

In building the ham radio 40/80 meter inverted v antenna I ran into a slight set back. My SWR readings were very high and I first thought my antenna or cable to be bad. Fearing the worst I found the problem. A short circuit in the SO-239 connector in my MFJ-259B Antenna Analyzer. This is how I...

Tags: MFJ-259B,Antenna Analyzer,Repair
WD0AKX 10 Meter Beacon
Added: 25th April 2010
Posted By: w4djd
Views: 531
Comments: 0

This is the WD0AKX 10 meter ham radio beacon transmitter on 28.2235 Mhz running around one half watt power output from Albert Lea, MN. The camera used is a Kodak Zi8 in 720p at 30 fps.

Tags: People ham radio amateur radio beacon 10 meter beacon qrp radio beacon beacon transmitter Albert Lea wd0akx educational People
Second Life Of MFM Hard Drives Iambic Telegraph Key
Added: 23rd March 2010
Posted By: w4djd
Views: 846
Comments: 0

UU1CC Sample telegraph pounding using D.I.Y. homebrew Iambic Paddle

Tags: ham-radio amateur radio ham telegraph cw iambic paddle homebrew homemade diy
Morris Gingery Ham Radio Coil Winder
Added: 5th March 2010
Posted By: w4djd
Views: 1196
Comments: 0

This is a video of the Lindsay/Gingery coil winder that I built a ways back. It makes nice universal wound coils as well as solenoids. It is basically the Morris coil winder that was popular in the early years of radio.

Tags: Tech Coil Winder Ham Radio Gingery Morris Tech
homebrew 3-tube ham radio receiver ARRL Simple-X
Added: 5th March 2010
Posted By: w4djd
Views: 860
Comments: 0

KC9KEP's first stab at a crystal filer I.F. tube receiver for 80 and 40m. From the 1961 ARRL handbook. More information at: http://www.bignick.net/simple_x/simplex.htm

Tags: Tech homebrew 3-tube ham radio superhet receiver ARRL Simple-X KC9KEP Tech
WARC new repeater system Finalmov
Added: 3rd March 2010
Posted By: w4djd
Views: 298
Comments: 0

Warminster Amateur Radio Club New Repeater Presentation

Tags: Tech ham radio amateur radio K3DN ham radio repeater Tech
LMR-600 UltraFlex Coax CB Radio  HAM Radio Feed Line
Added: 15th February 2010
Posted By: w4djd
Views: 574
Comments: 0

Yup, there's even a video of THIS! Amazing, soon we'll see people opening up utility bills on youtube. Anyway, if you've always used RG-8 or RG-213, this is a nice step right past LMR-400 and into the real stuff. This is the last step before Heliax. The difference w/ 600 Vs the first...

Tags: People Radio coax feed line. People
MAKE presents The Resistor
Added: 17th January 2010
Posted By: w4djd
Views: 308
Comments: 0

Simple, commonplace and vital to our electronic world - take a closer look at the current-fighting backbone of circuitry, the resistor! more Make presents: The LED http://www.youtube.com/watch?v=P3PDLsJQcGI The Capacitor - http://www.youtube.com/watch?v=ZYH9dGl4gUE audio & video by Collin...

Tags: Tech resistor electronic circuits current electricity diy how-to technology cool shock power synth makezine electronics science art Tech
MRF6VP2600H 144Mhz Amateur Radio Mosfet amplifier
Added: 11th January 2010
Posted By: w4djd
Views: 1544
Comments: 0

This is one of my 144Mhz Mosfet amplifiers with Freescale MRF6VP2600H. This is a 49V Ldmosfet amplifier for 144Mhz which easily puts out 500 Watt in linear service. The amplifier exhibits a gain of around 20dB and noteable gain compression sets in above 500 Watts of output power. Not shown in...

Tags: Tech MRF6VP2600H MRV6V2300 MRF6V4300 Tech