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 at www.ProjectAVR.com.
Tag Archives: Ham
Small USB to PTT/CW adapter
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 blog.
6×1 antenna switch
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, SM2WMV/SJ2W and others). More details […]
Adjustable gain LNA
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.