tags: noise source, zener For measuring the noise figure of amplifiers in a 50 ohm system, noise source which generate Gaussian RF white noise are often used. Here I present…
tags: noise source, zener, BFR93A Some modifications of the broadband noise source presented previously. This second version is based on a two-stage amplifier, with the same BFR93A transistors. The difference…
tags: balun, long wire antenna Here I show my realization of a 1: 9 "BalUn" (actually a UnUn) for the 3-50 MHz band based on two FT114-61 toroids. The use…
Measured sensitivity of a UV-5R is made as follows: an LF signal of frequency 1 kHz is FM modulated over a width of 10 kHz and sent to the input…
Here i present my realisation of a PC link interface for Yaesu FT-100. This interface alows you to transmit and receive audio signals from a sound card in order to…