Tasty » Adam Sampson's ham bookmarks

30m BAND UTILIZATION -- G3NRW edit / delete

Good visualisation.

to 30m bandplan digimodes ham radio ... on 25 June 2011

smatcheng edit / delete

Neat two-control ATU design. Making a better variable inductor (than I've currently got) would be the challenge -- note the wiper-on-toroid and variometer designs on this page... and also the air-cored coils at the bottom.

to antenna atu electronics ham radio ... on 06 May 2011

SvxLink edit / delete

Open source EchoLink server and client.

to echolink ham radio software ... on 11 April 2011

GQRP Club - Low Power Amateur Radio edit / delete

The GQRP guide to low-pass filter design. I need to order some bigger toroids.

to electronics filter ham lpf radio ... on 02 April 2011

KITE ANTENNAS G4ROJ edit / delete

And multiple kites. And aerostats. Wow.

to antenna ham kite radio ... on 06 February 2011

ARRL PDFs edit / delete

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.

to amplifier filter ham lpf radio ... on 31 January 2011

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

G3TXQ edit / delete

Thought I'd bookmarked this before -- hm. Good stuff on antenna tuners and feedlines.

to antenna electronics ham radio ... on 30 January 2011

The Easy Way edit / delete

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).

to antenna ham hf radio ... on 28 January 2011