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Posts Tagged ‘Ham’

Twin ‘T’ CW (Morse) Practice Oscillator

Friday, July 20th, 2018

  Steve Smith (G0TDJ) writes, "I successfully completed the Twin ‘T’ Oscillator, original by Mike Maynard – K4ICY. It’s a great circuit and sounds really good. Much better than a raspy 555 version. Mike has been kind enough to put a link to my project on his website." More details...

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Small USB to PTT/CW adapter

Friday, December 22nd, 2017

Mare writes, "In this post, I will first introduce some of the basic technical background of the control of the transmit signal (PTT) and other signals (eg CW or linear activation). The second part will describe the  interface development and the final product." More details at Mare & Gal Electronics...

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6×1 antenna switch

Thursday, November 30th, 2017

Mare published a new build: This is complete project for 1×6 antenna switch. It was bult in more than 50 pieces around the world and performs really good. Even big guns use it for their systems. The project was designed with help from other OMs (S55O, S59MA, S50LD, S51CT, S51ZJ,...

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Adjustable gain LNA

Friday, June 9th, 2017

Mare published a new build: Low noise amplifiers are very useful. I built one with single BFG425W transistor with adjustable bias current. Project info at Mare & Gal Electronics homepage.

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