Earlier today, I posted the following on Audiokarma. I think it should be on diyAudio too. Some of it I posted already in bits and pieces, but now it's more 'compressed', and under a better header:
For data on tubes, this is the site I go to:
https://frank.pocnet.net/
Note the "Much More" button in the upper right corner on that site. It leads to a wealth of tube manuals and other books on tube technology. The following link for instance leads to the sub-page with the Philips Series of Books on Electronic Tubes, to which I contributed a couple of books that I scanned myself (but not all are in English though):
https://frank.pocnet.net/other/Philips/SeriesOnElectronTubes.html
Scans of the "Philips Technical Review" and of some other series of research papers by Philips stood on a personal internetpage that was part of a larger Philips site, but some years ago they were all taken off-line. Luckely the scans of the "Philips Technical Review" series all found their way to the "World Radio History" site. But the other series of research papers did not. The same goes for the handy Excel indexes for all the series. But I downloaded all at the time and uploaded them to Google Drive. The links in the indexes themselves don't work anymore but they still are a handy tool for searching. Here are the relevant links:
https://worldradiohistory.com/Philips_Technical_Review.htm
https://docs.google.com/spreadsheets/d/15eXWd1afpPjQYcKAPBACx0oJB_qvy1za/edit#gid=248973280
https://drive.google.com/drive/folders/1m9aE3j9lX5IpH0vO0DTu1nhvkkQw9FMR
https://drive.google.com/drive/folders/1DFzUd18L5cMMKHzJrmWXwXwOhdtF_TZH
The following link leads to data/pictures/schematics/etc. I gathered through the years on the subject of tube testers. Almost all was found on the internet so don't expect completely new finds. But I think there's no other place on the internet at the moment where so much can be found at one place:
https://drive.google.com/drive/folders/1ep0Qgl2wqFCD2sZ4Q0Z3tFoaZxcrU7F2
For data on tubes, this is the site I go to:
https://frank.pocnet.net/
Note the "Much More" button in the upper right corner on that site. It leads to a wealth of tube manuals and other books on tube technology. The following link for instance leads to the sub-page with the Philips Series of Books on Electronic Tubes, to which I contributed a couple of books that I scanned myself (but not all are in English though):
https://frank.pocnet.net/other/Philips/SeriesOnElectronTubes.html
Scans of the "Philips Technical Review" and of some other series of research papers by Philips stood on a personal internetpage that was part of a larger Philips site, but some years ago they were all taken off-line. Luckely the scans of the "Philips Technical Review" series all found their way to the "World Radio History" site. But the other series of research papers did not. The same goes for the handy Excel indexes for all the series. But I downloaded all at the time and uploaded them to Google Drive. The links in the indexes themselves don't work anymore but they still are a handy tool for searching. Here are the relevant links:
https://worldradiohistory.com/Philips_Technical_Review.htm
https://docs.google.com/spreadsheets/d/15eXWd1afpPjQYcKAPBACx0oJB_qvy1za/edit#gid=248973280
https://drive.google.com/drive/folders/1m9aE3j9lX5IpH0vO0DTu1nhvkkQw9FMR
https://drive.google.com/drive/folders/1DFzUd18L5cMMKHzJrmWXwXwOhdtF_TZH
The following link leads to data/pictures/schematics/etc. I gathered through the years on the subject of tube testers. Almost all was found on the internet so don't expect completely new finds. But I think there's no other place on the internet at the moment where so much can be found at one place:
https://drive.google.com/drive/folders/1ep0Qgl2wqFCD2sZ4Q0Z3tFoaZxcrU7F2
I almost always go here for data sheets.
http://tdsl.duncanamps.com/tubesearch.php
The home page is:
http://www.duncanamps.com/
Hope this helps.
pos
http://tdsl.duncanamps.com/tubesearch.php
The home page is:
http://www.duncanamps.com/
Hope this helps.
pos
Thanks but.... did you see the FAQs?
On Line Tube Learning for newbies....
https://www.diyaudio.com/community/threads/on-line-tube-learning-for-newbies.38278/post-471410
Not really stuff for newbies I would say. But if I was not allowed to post it here, than of course it's fine with me if Forum Moderation moves it to a more appropriate section.