Popular tubes

[duncanamps]

No posts on the TDSL section yet, so I thought I would take the liberty of throwing one in

Just updated the TDSL database to show tube families for the all time searches. By family, it means that 6L6, 6L6-G, 6L6-WGB, 6L6-GC are all the same 6L6 family.

Some data that's come out of it, this is page loads since 2003 so 22 years worth of data:

Code: Select all

Tube family    Page loads
-----------    ----------
6L6	        472,517
12AX7/ECC83     406,274
6BQ5/EL84	347,470
6CA7/EL34	330,486
6V6	        322,595
12AU7/ECC82	234,921
6SN7            228,472
6DJ8/ECC88	200,095
5U4             182,334
KT88            174,901
6922/E88CC	163,231
12AT7/ECC81	154,196
6550            133,614
6SL7            132,850
6267/EF86	129,249
5R4             122,262
5AR4/GZ34	120,432
5Y3             100,022
807              91,613
5687             88,467

So now you know what's popular!

Up to the minute info on the Statistics page

Regards,
Duncan

[JoeB]

Interesting data Duncan,
I have just scanned a application note from STC, in PNG format, but I can easily redo that to PDF if you wish.

You specifically point out the 6L6, which is a tiny part of that series of valves from RCA, although I believe their beginning was English.
a 6L6 is a direct derivative of the 807 which goes all the way back to the early 1930's. I think origionally they were a military broadcast tetrode intended for use in mobile equipment of that time. I would guess class C telegraphy transmitters in early bombers, tanks and even as backpack radios for the plebs.
It directly connects from the 807, to the 6L6, then the 6V6, 6BW6 and the 7C5, thence to 6AQ5. ALL basically the same design valve, but with decreasing plate dissipation as we move right to left. The file is 39 megs, so if you want this scan from the origional application manual printed by STC ( and is quite rare ) in 1961.
I would need despatch this to you by email, or if in PDF it would probably be larger.

A teaser for you,


Joe

[JoeB]

TRy reading my dumb post left to right
its 39 pages
Joe

[duncanamps]

Hi Joe,

I have just scanned a application note from STC, in PNG format, but I can easily redo that to PDF if you wish.

Thanks for doing this, however would you be good enough upload the file to your website or storage area please and post the link, rather than upload here. I can link to it from TDSL and from here - that will bring it to a much wider audience.

a 6L6 is a direct derivative of the 807 which goes all the way back to the early 1930's

There's some great history on The Valve Museum page for the 6L6 and the 807, along with many other types, it's a great site and well worth a look.

Regards,
Duncan

[JoeB]

I dont have off site storage or a website.
Yes I agree with your comment of r-type.org. I have been using it for many years, but thats when my own library doesnt have a particular valve. Lots of the "cv " series or common valve series comes under that heading. I have access to all the valves that the gummit sold when we made our whole military go solid state. There were millions sold off for pennies, and I wasnt there . But I know a bloke that bought most of the useful ones. He did leave the huge navy magnetrons. A whole pallet of 807's cost him $20 Australian dollars, and I think that was 1000 units.


Joe