Overview JUMA TX500 is a digitally controlled CW transmitter for the 500 kHz amateur radio band (600 m). The transmitter is available as a component kit which inludes all the electrical and mechanical componets. JUMA TX500 is using ultra high efficiency CMCD amplifier (Current Mode Class D) topology in the final RF amplifier. The final…
– 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…
ADS-B / UAT / AIS / Marine band / Air bands (VHF and UHF) Capable / Multi-Device – Multi-Band – Multi Channel Software Defined Radio Receiver / Decoder. A unique and revolutionary product, built on the heritage of the SBS-1 range of receivers. The SBS3 is a true stand-alone SDR receiver, unlike the majority of…
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…
Published : October 24th 2011 Updated : February 26 2012 with new Video (See below) New Kojinsha 4KWT (Max Power is 5 KWT) HF Linear Amplifier “KL-1” on 3cx3000a7 Triode tube. Price: $10-12K USD Video: Pictures from Tokyo HAMFAIR 2011 by Mr. Yano Hirokazu Read also: https://www.cqdx.ru/ham/?p=33029