other authors to YU1LM design
At this page I shall present some
complementary designs from other authors. This designs will help homebrews to
easy solve some missing components complementary with my designs. Some of them I
tested and I am recommending.
Synthesizer for SDR RX/TX/TRX
bands 3.5, 7 and 14
MHz built by Pavel RZ6FY
DR2B SDR receiver built by
Pavel Bakulin RZ6FY and his PLL synthesizer with IC LM7000 for bands 14, 7, 3.5
MHz. Synthesizer dimensions are the same as DR2B and it is controlled via
serial COM port ( with his control software see PC screen shot above) http://forum.cqham.ru/viewtopic.php?t=10988&postdays=0requency
SDR Syntetisizer .pdf
Active small HF antenna,
miniwhip by Reolof Bakker PA0RDT &
design and articles aren't
my design but I checked them successfully. I designed
RXs to be capable to handle strong signals from big antennas like
mine (84m and 168m horizontal delta loops).
Many homebrew builders have handicap that they can't erract "monsters"
like mine. They have very limited space but with help
of this very good and small active antenna built and
designed by Reolof Bakker PA0RDT & Aldo Moroni every my SDR RX can receive weak
signals in HF range. Thanks for this articles
goes to my friend Gabriel
Scevlik from Slovakia.
antenna by Reolof PA0RDT.pdf
SMT HF SDR receiver
based on DR2A+ design with LO
2 x working frequency by Petr Vagner OK2CPV
This design is very interesting and it is similar to
mine SDR RX inside unpublished design AVALA-05 I checked it
successfully. It is very interesting that both arrived to the similar
solutions. SMT SDR RX is designed by Petr OK2CPV.
HF SDR Receiver DR2A+ design OK2CPV & YU1LM.pdf