|Lundahl Transformers AB||The ultimate tip in the internet. This small Swedish family company makes modestly and silently a whole range of unique audio transformers. Priced is in the middle range, but performance is top-class.|
|2A3 Maniac||German Text only. Einer der allerschönsten 2A3 Seiten im Netz.|
|Van den Hull||The makers of finest PHONO Cartridges|
|KONDO JAPAN||Mr Hiroyasu Kondo lived until 2006.|
|Gyraf Audio||Excellent website if you are interested in tube audio compressors, and other studio equipment. With very nice DIY part|
|Tube CAD||John Broskie's Guide to Tube Circuit Analysis & Design. Take this site as it is, programs are for Windows XP only, and Email is not answered, but it's useful site anyway.|
No joke, Neil Styner shows how to make a working triode from with an alcohol flame, an no vacuum. He observed a power gain of 60x. If really so, this would have changed the early days of radio telegraphy a LOT. More...