Tube substitution chart on the Net?

Usually Duncan's and Franks (the first two listed) will give you whatever info you need. If you need something obscure search through the others. Look up a tube-it will give you substitutions.

1)Duncan Amps: http://www.duncanamps.com/(click tube data sheet locator)
2) Frank’s Tube Data Page http://www.mif.pg.gda.pl/homepages/frank/
3) Triode Electronics Tube Data Sheets: www.triodeel.com/tubedata.htm
4) Radau5”s tube data sheets: http://www.radau5.ch/valves.html
5) Tubebuilder Tube Data: http://www.tubebuilder.com/tubedata.html
6) Vacuum Tube Valley: http://www.vacuumtube.com/FAQ.htm.
7) Svetlana, Tube Dictionary: http://www.svetlana.com/docs/dictionary.html
8) Audiomatica, Tube Directory: http://www.mclink.it/com/audiomatica/tubes/home.htm
9) National Valve Museum’s list of Equivalents: http://www.valve-museum.org/
10) 4Tubes. http://www.4tubes.com
11) Tube Collector’s Association: http://www.tubecollectors.org/
12) Mach-Mat: http://www.machmat.com/sheet/index.htm
13) Kytelabs Tube infobase: http://www.qsl.net/dl7avf/roehren/roehren.html#TOC
14) An Intro to NOS tubes: http://www.soundstage.com/tubeor/tube.htm
15) Western Electric Archives: http://www.westernelectric.com/spec_sheets/we_spec_sheets.htm
16) Tom Jennings: http://www.wps.com/archives/tube-datasheets/index.html
17) Åke’s TubeData: http://www.tubedata.com/
18) Magic Sound of Tubes (NOS): great pictures of NOS tubes. http://spazioinwind.libero.it/themagicsound/index.htm
19) Bill’s (NJ7P) Database: http://hereford.ampr.org/cgi-bin/tube?index=1
20.) * http://oldradio.qrz.ru/tubes/
21) Joe’s Driver Tube Data: Includes data sheet for THD and gain plotted for frequency http://users.rcn.com/joepage/drvr_tubelist.htm
22) The Tube Seller, info on the 6SN7: http://www.tubeseller.com/index.html

Wow. What a great reference. Thanks.

Email me. I'll be happy to look a few up for you. I have several different guides.
Emery
emfoods@yahoo.com

That was exactly what I was looking for. Thank you.