QEX March/April 2003 issue Article Title:
"A High-Level Accessory Front End for the HF Amateur Bands"  (pages 45 to 56)
(by Sergio Cartoceti, IK4AUY, 2003)

Further Info, Photos, Performances Data, 9 band BCD autoswitch and
 QEX Article Errata Corrige (click on the green links below)

Come back again to check for updates

 

Photos  FROM HOMEBREW GALLERY by I4FAF  about earlier versions. 
The final version  presented in 
QEX is named SRC-02. 
 SRC Front-End  SRC01 Front-End     SRC02 Front-end
         (pb filters simplified)        (pb  filters Butterworth, preampl)  (Cauer pbf, preampl.,var att.)

 SRC02 inside photos

Where to find parts HELP 9 band Autobandswitch BCD data
(Butterworth and Cauer vers) (relays,pin diodes,transistor,caps) (circuit and board .zip file,3 .pdf files)
Preampl. Performances data QEX March/April 2003 article  Errata Corrige Our project overview by IV3DDM with band by band spectrum analyser - tracking generator pb filter curves
 Down load here performance tests by Eraldo I4SBX
an excel file with Cauer filter passband curves and IMD-IP3 data

(new)
More circuit board templates about QEX March/April 2003 article project are available, they are many and if really interested inquiry for a CD with cost coverage.

 

Last update: March 12, 2008