Tag " hf"

Software-Defined SSB and ISB Configurations DSP Based Syllabic Squelch Remote Control via Serial and Ethernet Comprehensive BITE to LRU Internal AC Power Supply Data Link - MIL-STD-188-203-1A TADIL A and Link 11/22 (Factory Installed Option) HF Data - MIL-STD-188-110 A/B and STANAG ALE - 2G MIL-STD-188-141 A/B and 3G STANAG 4538 500 W, 1 kW, 5 kW and 10 kW LPAs 150 W and 1 kW Antenna...


Continue Reading »

NTIA: No Objection to Additional Data Modes on 60 Meters In response to requests for clarification from the ARRL, the National Telecommunications and Information Administration (NTIA) has confirmed that it has no objection to the use of a broader range of data emissions by amateurs on the five 5 MHz frequencies on 60 meters. ARRL's original understanding was that the NTIA preferred that the use of 2K80J2D...


Continue Reading »

Date : 22 March 2012 Time : 21:30 GMT Frequency: 7020-7025 KHz Receiver : SDR "Perseus" Antenna : 12m Vertical wire Receiver Location : North West Germany http://www.cqdx.ru/blog/audio/HAARP_2130z_7025KHz_22MAR2012.mp3 Officially, HAARP is a research station directed by the Air Force Research Laboratory's Space Vehicles Directorate in Gokona, Alaska, that opened in 1992 to gather data...


Continue Reading »

80m Dipole kit: This option adds a wire dipole that runs parallel to the boom, using the end loop elements for capacity hats. Performance is only 0.8dB down in gain from a full sized 80m dipole and there is zero interaction with antenna and no wind load added. DB42 MonstIR Pro Yagi Antenna The DB42 Monstir Pro is currently the largest of the Dream Beam series of Yagi antennas, with 5 elements...


Continue Reading »

Chinese Windtalk 2.3 MK-II Field Day Antenna for 40-20-10-6m. Bands. Specifications: Band: 40m/20m/10m/6m SWR: ≤2.0 Impedance: 50 Ohm Power: 100W PEP Irradiator: 16#AWG Outlet: SL16 Balun: 4:1 Package Size: 300×100×60mm Weight: 0.695Kg Price: 168.00 元 Link


Continue Reading »

- Output power 1000W pep - All HF bands + 50MHz - High gain - High efficiency - Drain voltage indicator - Drain current indicator - MOSFET case temperature indicator - Forward and reverse power indicator - Adjustable gain for 5W - 20W input power - Using single Freescale MOSFET MRFE6VP61K25H - Temperature controlled fan - Reverse power protection - Over current protection - Over...


Continue Reading »

Letter from the President, Steve Farkas, WA2NFR I’m spending about eighty percent of my time on Alpha’s new A4040 Autotuner.  It’s great to get back to engineering – my true love. It’s picture time! This was shot as we were assembling the first article and things look really good.  A few holes in the wrong place, but all and all, things are looking really good for shipment at the end of the quarter. ...


Continue Reading »