W0IVJ's Homebrew Ham Radio Antenna Rotator ... W0IVJ's Homebrew Ham Radio Antenna Rotator

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...

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.

This is a homebrew 1200 watt RF amplifier using a pair of 3-500 tubes. I built it for AM use on the Amateur Radio 75 meter band. Using a rice box, 15 watts of drive produces 300 watts output. ... KA1TDQ Jon Jonathan Rines Amateur Ham Radio homebrew amplifier AM tubes

Schematic of the 4 tube radio, experimentally built in a way of the radio-pioneers (1910-1945). The radio acts as a cascade type receiver when the antenna coil has a high self-inductance, with lower self-inductances of the antenna coil you can put in a mixing process with the oscillator. Perhaps...

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

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

This is a one valve [tube] radio that believe it or not I constructed 48 years ago. It remained lost but was discovered again during a recent house move. The valve used is a battery R.F. pentode dating from around 1948 on a B7G base. The type number is DF91 or the American equivalent, the 1T4....

This is a preview of the upcoming ARVN "Dayton Collection" from the 2009 (and some 2008) Dayton Hamvention. This clip comes from the "Unauthorized Dayton Tour 2008/2009). Details at www.arvideonews.com. KC3VO's 2kW ham radio backpack amplifier gets the attention of the FCC! ... Amateur ham radio...

Here is a short demo of a King Conversions (QROKing.com) modified SB220 amplifier for monoband 6M operation. I am very pleased with Lou's work and I let this demo speak for itself. CU on 6M! 73 Lee