The Ham Radio Video and Audio Sharing Site http://hamradiotube.com/sm 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. http://hamradiotube.com/sm/media/414/WD0AKX_10_Meter_Beacon/ http://hamradiotube.com/sm/media/414/WD0AKX_10_Meter_Beacon/ UU1CC Sample telegraph pounding using D.I.Y. homebrew Iambic Paddle http://hamradiotube.com/sm/media/411/Second_Life_Of_MFM_Hard_Drives_Iambic_Telegraph_Key/ http://hamradiotube.com/sm/media/411/Second_Life_Of_MFM_Hard_Drives_Iambic_Telegraph_Key/ 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. http://hamradiotube.com/sm/media/408/Morris_Gingery_Ham_Radio_Coil_Winder/ http://hamradiotube.com/sm/media/408/Morris_Gingery_Ham_Radio_Coil_Winder/ 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 http://hamradiotube.com/sm/media/407/homebrew_3-tube_ham_radio_receiver_ARRL_Simple-X/ http://hamradiotube.com/sm/media/407/homebrew_3-tube_ham_radio_receiver_ARRL_Simple-X/ Warminster Amateur Radio Club New Repeater Presentation http://hamradiotube.com/sm/media/406/WARC_new_repeater_system_Finalmov/ http://hamradiotube.com/sm/media/406/WARC_new_repeater_system_Finalmov/ 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 2 mentioned is just way too undeniable on VHF and UHF. http://hamradiotube.com/sm/media/403/LMR-600_UltraFlex_Coax_CB_Radio__HAM_Radio_Feed_Line/ http://hamradiotube.com/sm/media/403/LMR-600_UltraFlex_Coax_CB_Radio__HAM_Radio_Feed_Line/ 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 Cunningham Makezine.com http://hamradiotube.com/sm/media/398/MAKE_presents_The_Resistor/ http://hamradiotube.com/sm/media/398/MAKE_presents_The_Resistor/ 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 the film is a 5 pole low pass filter which was used to reduce the harmonic content of the output power. The Bird wattmeter uses a 10W slug for full scale. The other wattmeter shows full scale at 2000 Watts. The gates of the amplifier are shunted to ground with 10 Ohm smd resistors which reduces the gain to 20dB. First attempts with a 1:4 cable transformer showed good efficiencies as well but gain compression set in too early and not more than 350Watts of linear power could be achieved. That is the reason why I went for a less known 1:9 transformer in the output circuit. Changing the gate shunting resistors enables me to determine the gain of the stage from 20-23dB. http://hamradiotube.com/sm/media/395/MRF6VP2600H_144Mhz_Amateur_Radio_Mosfet_amplifier/ http://hamradiotube.com/sm/media/395/MRF6VP2600H_144Mhz_Amateur_Radio_Mosfet_amplifier/ Ham radio 10 meter amp project winter time fun ... "Ham radio" "10 meter rig" "CB radio" http://hamradiotube.com/sm/media/394/5_pill_homebrew_mobile_10_meter_amp_project/ http://hamradiotube.com/sm/media/394/5_pill_homebrew_mobile_10_meter_amp_project/ 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 http://hamradiotube.com/sm/media/382/King_Conversions_SB220_Monoband_6M_amplifier_15_KW+_-_QROKingcom/ http://hamradiotube.com/sm/media/382/King_Conversions_SB220_Monoband_6M_amplifier_15_KW+_-_QROKingcom/