Good resources for learning about tubes

[camshash]

Hi guys,

I'm looking to try out some different tubes in my fox audio apex 460 mod, but instead of just asking what tubes would sound good for my needs Id rather learn for myself so I can make educated decisions in the future. I know the basics of how tubes work, but any good resources are appreciated. Currently Ive only made tube circuits with microphones but want to start branching out into Vari-mu and tube amps. Thanks!

 

[gyraf]

I like this: Tubes 201 - How Vacuum Tubes Really Work

 

[Flatpicker]

https://sound-au.com/valves/index.html
See list of articles at the bottom of the page.

 

[scott2000]

https://frank.pocnet.net/other/Sylvania/Sylvania_ElectronTubeApplicationNotes_1960.pdf

 

[Tubetec]

Valve Wizard is well worth a look too .
The books are a great way to learn , but here you can bounce around an idea or ask a question and get a range of opinions back on a subject .

 

[Tubetec]

Franks pages are great , R-type is another great resource,
Radiomuseum.org , Kubarth ,lots of great stuff there .Douglas Selfs site .
Download yourself a copy of RDH4 if you havent already , that will take you from the foundations of wireless to around 1960

 

[Tubetec]

Duncans amps PSUDII is a must have for me
This site has some very handy calculators
http://www.sengpielaudio.com/calcul...u=&value_dBV=&value_dBm=&value_dBm_select=600Theres many usefull online electronic calculators that take care of the hard math ,pencil and paper , you just punch in a few variables and get an answer , once you get used to the equation the principle behind is isnt far from understanding .

Alexa , plot me an EF86 with 75 volts at the anode , 1.5 k cathode resistor and 50mV ac at the grid ,
doesnt sound all that far fetched anymore does it ? Using REW to evaluate real circuit performance beats any kind of simulation