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Handy list of the PDFs available on the ARRL website, courtesy of the Wayback Machine.
to arrl electronics etext ham radio ... on 31 January 2011
Genesis G59 Software Defined Radio Transceiver SDR QRP edit / delete
Power amp with integrated low pass filters.
WW2R Radio Web page edit / delete
Doing interesting stuff on the really high bands -- in particular, repurposing commercial amplifiers.
to electronics ham microwave radio uhf vhf ... on 30 January 2011
Thought I'd bookmarked this before -- hm. Good stuff on antenna tuners and feedlines.
to antenna electronics ham radio ... on 30 January 2011
Why high SWR and feedline radiation isn't necessarily a bad thing (because it doesn't actually cause much loss in practice, and it lets you tune the antenna from the transmitter end).
Sort of a two-element log periodic?
TAPR - HPSDR PennyWhistle edit / delete
I'd forgotten about this kit -- or, rather, not realised how easy it is to drive from something other than the HPSDR hardware. Hohum.
Homemade HF - antennas for mobile operation 7Mhz ,10Mhz, 14Mhz, 18Mhz, 21Mhz, 24Mhz,28-430Mhz edit / delete
Building a continuously-loaded short vertical antenna. I think I need an antenna analyser in order to reproduce this...
I like the stacked double loop antenna.
to antenna electronics ham loop radio ... on 22 December 2010
DJ9CS Betrieb des SoftRock RXTX edit / delete
Using the Funkamateur PA kit with the SoftRock.
to amplifier electronics ham linear radio sdr softrock ... on 22 December 2010
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tasty by Adam Sampson.