About building, soldering, testing, measuring amps, audio and electronics stuff
Adapting amp inputs for various signal sources.
Preamp module from Ebay is...
About tools, soldering stations, work place gadgets
Experiences from building the 41Hz Audio amps. Feedback. Ask others what they think.
LED's & Illuminated...
Soldering surface mount components, winding toroids...
Farnell has taken up on...
About audio / electric / signal measurement techniques
Advantest R9211 spectrum...
Where to find suitable transformers and casings.