– 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…
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…
The JRC JSB-196GM MF/HF is a new generation of economical marine transceiver. Its high functionality design complies with the GMDSS A2 area requirements. The JSB-196GM fully meets the latest regulations for maritime MF/HF communications by connecting the NCT-196 DSC terminal with a built-in watchkeeping receiver. The radiotelephone system consisting of the JSB-196GM, covering the frequency…
Photo by kd1jv 80, 40, 30, 20 and 17 or 15 meter operation (17 or 15 meters selected at time of building) DDS VFO for wide tuning range with crystal stability, 50 Hz tuning steps. Single step or auto increment tuning Sensitive, 0.2 uV receiver with very low internal noise for exceptional S/N ratio. Selective…
The 333 Triplexer is based on the work of K6KV as presented in the June 2010 QST Magazine article “HF Yagi Triplexer Especially for ARRL Field Day”. Applications range from Field Day, to Emergencies, to Contesting, to DXpeditions. The Triplexer effectively makes one tower and a triband yagi into 3-towers and 3-yagis, while adding only…