The Douglas Self Site edit / delete

Audio electronics, and a fascinating collection of obsolete engine technologies. Steam engine using boiling petrol as a working fluid, anyone?

to amplifier amusements audio electronics engine engineering mechanica retrotech steam valve ... on 19 June 2012

Electronics Projects - Vacuum-State Electronics edit / delete

A variety of neat valve-based projects -- amplifiers, scope-based TVs, etc.

to amplifier audio electronics retrotech tv valve video ... on 10 April 2012

Welcome to the W7GJ Home Page! edit / delete

Reusing broadcast PA modules for 6m, and a surprisingly good homebrew coax relay.

to amplifier electronics pa radio relay ... on 30 March 2012

Amateur Radio at W5JGV edit / delete

Building Very Large Power Supplies, and other radio restoration stuff.

to amplifier electronics psu radio retrotech ... on 30 March 2012

G4DCV edit / delete

Assorted technical stuff: building RF amps with Russian valves, LS3/5a collecting, radio software for the Amiga...

to amiga amplifier electronics radio speaker ... on 30 March 2012

Welcome to the PA3CSG website! edit / delete

Big RF amplifiers with cheap Russian valves, and serious filters for them.

to amateur amplifier electronics hf radio rf valve vhf ... on 27 February 2012

GLOWBUGS TIMES - DIY Amateur Radio Tube Junk Box edit / delete

I like the 5W valve transmitter. Very cute!

to amplifier electronics homebrew qrp radio valve ... on 13 September 2011

pa0rcl Home edit / delete

Extremely impressive homebrew radio gear. I particularly like his recased and modified MKARS80, and the linear amp he built to go with it.

to amateur amplifier electronics mkars80 radio ... on 10 July 2011

BASIC LINEAR AMPLIFIERS by SM0VPO edit / delete

Good overview of basic linear amp design.

to amplifier electronics radio ... on 04 February 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

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