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

SRC02 inside photos

RX IF AGC high gain

CDG2000 - TRX early photo

Cauer pbf, preampl.,var att. Butterworth and Cauer vers. our try about W7AAZ design CDG2000 - TRX  latest photo

HF qrp Linear Ampli

   HF really Linear Amplifier  
 with Mosfets vs. Transistors    with Tetrode Tubes  


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ARI award for more than 50 Years membership

home laboratory intruments

more lab. instruments Racal Dana 1992 counter - HP 3400A RMS Volt. - Boonton 42BD milliwattm.

signal generators and hp attenuators

signal generators

Marconi Spectrum Analyser TF 2370

Tektronix oscilloscope 2465 - 300MHz and below home made 600MHz spectrum analyser

 

Last update Dec 22, 2009