Wideband noise source v1 DC-100 MHz
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…
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17 January 2021
Wideband noise source v2 DC-200 MHz
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…
17 January 2021
Balun 1:9 for a long wire antenna, operating between 3 and 50 MHz
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…
17 January 2021
UV-5R sensitivity and squelch
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…
9 January 2021
Yaesu FT-100 to PC link
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…
13 October 2020