I4FAF HOMEBREW GALLERY
HF TRX - ham bands only | HF TRX with gen.cov. RX | SRC Front-End | SRC01 Front-End |
with 28/144 MHz transvert | synthesized, 1 IF upconv. | pb filters simplified | pb filters Butterworth, pream |
SRC02 Front-end | RX IF AGC high gain | ||
Cauer pbf, preampl.,var att. | Butterworth and Cauer vers. | our try about W7AAZ design | |
HF really Lin.Amplifi | |||
with Mosfets vs. Transistors | with Tetrode Tubes |
I4FAF, Romano,
has been
awarded with this nice CERTIFICATE CLICK HERE issued by ARI that states more than 50 years ARI membership (oltre 50 anni membro Associazione Radioamatori Italiani). |
I4FAF home made
laboratory instruments, useful tools for many amateur radio home brew projects entertainment. |
Our bench-work (CAUER FILTER on the bench for optimisation) |
Spectrum
Analyser 1 to 600 MHz with tracking RF gen. (1996) see note 4 under my article for project references in AMPL-DETECT LOG 80dB DINAMICA |
Home built HF wattmeter, synthesized RF gen 4 to 520 MHz (1989) |
Two 1 to
50 Vdc, 5 Amp. regulated power supply (1996), main regulator is from a QST article. |