Manufacturer scans - All brands- database

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This site is not just for 4 anything. It is.....

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This is a private site - nothing for sale here - no responsibility for external links

Disclaimer 2:
This is NOT AN ANTI PAYPAL WEBSITE. Just some unlucky experiences are published here - no responsibility for external links


Quick reference for main data, AMROH Book only

Computer made curves, not finished section

Datasheet Catalogs
Tube decoding , small print etc

Tube Forum
visit our DIY FORUM!

Tube Schematics with Lundahl transformers

Tube Schematics by Tube Part Number

Tube Schematics by HiFi-Brand

Tube Radio Schematics Heaven.
thousands of Tube Radio Schematics online, for free.


Problems with Warning! Make good note, the site is not for free at all. You pay with your time and your energy. Member fee is high for what you are offered, and I was kicked out for disliking the technical problems with their software. Read more about it here. .

Here I found a link from somebody with similar problems with Mr. Ernst Erb from

Pro Audio. (Tube Equalizers, mixers, compressors, ect)
Tube Schematics of Musical Instruments


Steve Bench Pages


Some very old articles, still worth reading
Equipment Catalogs


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.

Yamamoto Sound Craft JAPAN

For the finest PHONO amplifiers from Japan, and wow.....a LOT more Most interesting KURASHIMA amplifiers. Mr. TOSHI from JAPAN builds his own tubes. (Yes Yes Yes!!!)
2A3 Maniac German Text only. Einer der allerschönsten 2A3 Seiten im Netz.
Van den Hull The makers of finest PHONO Cartridges
Audio Note KONDO JAPAN We regret to inform that on January 8th 2006, Hiroyasu Kondo, founder of Audio Note Japan, passed away peacefully in his sleep while attending the T.H.E. SHOW audio show in Las Vegas. He is survived by his wife, Kazuko; his son, Yuji; and his daughter, Hisae.  More...
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...

More Funny projects - and even more here


For the solution, do this: Print the figure one, cut the pieces out with scissor, and then lay them on the second picture. You will be amazed that it works! Sill, when I did so myself, this lead me to the answer.

The next three pictures I have photoshopped:



how a tube works

"As soon as someone can demonstrate the art of flying, there will be no shortage of human invaders on the moon, and Jupiter'
(Johannes Kepler, in the year 1610 in a letter to Galileo Galilei)