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KP4RY Puerto Rico flag Puerto Rico

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Ham Member Lookups: 25732

 
  1. http://www.livestream.com/bpsk31

Hello: http://www.livestream.com/kp4ry

Thanks for looking me up. I live in the center of the island of Puerto Rico and you might know my name is Abimael. I have two stations . in my house consisting of :

Rig: Yaesu 857D Elecraft KX3, Kenwood D700 Yaesu FT 400D,IC 2820,IC 51A Yaesu FT1D HT 1550 XLS Motorola and HT Tekk D-500 for DMR

Antennas: ADDXCC DIPOLE.

I enjoy working D-star,C4fm,DMR  mode which allows me for great flexibility between VHF/UHF and HF. I also work digital modes among them SSTV. I hope to catch you on the bands some time.

"The L-3403 Klystron is a four-cavity, modulating anode, pulsed klystron amplifier which can be mechanically tuned to amply any frequency within the range from 400 to 450 MHz. The tube will produce a peak power output of 1.25 MW at an average RF power output of 75 kW at a 0.06 duty factor with a minimum power gain of 35 dB. The efficiency of the tube is 35%, so 75 kW output power requires 223 kW of beam power. When the proper voltages are applied to the tube, a beam off electrons is formed at the cathode end of the tube and travels axially though the tube to the collector. The beam is maintained in its cylindrical shape by an axial magnetic field produced by eight external electromagnets. The beam passes through four internal cavity resonators. With RF power applied to the input cavity, and with the four cavities tuned properly, the amplified signal is available at a coaxial output connector. After the electrons pass through the cavities, they impinge on the inner surface of the collector and the remaining beam energy is converted to heat with is carried away by liquid coolant."

"The 430 MHz radar transmitter at Arecibo Observatory was built in 1962 by Levinthal Electronic Products, which became Radiation at Stanford, as original equipment for the observatory. The transmitter operates at a fixed center frequency of 430 MHz with a maximum transmitted bandwidth of 1 MHz. Two Litton L-3403 or L-5773 klystrons operate in parallel as a balanced amplifier, with a 90-degree power splitter at the input and a high-power 90-degree combiner at the output, to provide a maximum total peak pulse output power of 2.5 MW. Power is delivered to the antenna platform cia 1,500 Ft. of WR21000 waveguide. Am infinitely variable power splitter on the platform provides transmitter power to feed antennas in both the Gregorian dome (a feed horn) and the carriage house (the line feed). This allows dual beam operation, which could have been called "dual radar" operation, as it is equivalent to two radars pointing in different directions. The maximum duty cycle is 6% so the maximum average output power is 150 kW."

8186945 Last modified: 2017-06-28 16:11:53, 3643 bytes

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