Nippon electric NEC 12RLL3 1962-65 production tube

[puremilk]

this tube is identity to 12AX7 a japanese version by Nippon electric,equipment grade,4 pcs NOS for sale@$200.
i accept paypal.

 

[JonSnell Electronic]

The 12R-LL3 is a direct equivalent to a 12AV7 which is a Medium Mu Twin Triode. The 12AX7 is a High Mu Twin Triode.
12AV7 Medium-Mu Twin Triode Tube [VT-12AV7] - $10.00 : ElectronTubeStore.com, Raw Materials and Components

 

[puremilk]

i think the 12RLL3 last number 3 stands for ECC83 3 series,just like 6RHH8 indentity to ECC88，check out the last number 8.do you have any article shows that 12RLL3 equivalent to 12AV7?

 

[JonSnell Electronic]

Yes, here is the link;
Big Time Operators CB Club
Is a list of equivalents. Hope that clarifies.

 

[puremilk]

thanks for infos,it helps.i will do a measurement from my tester to ensure it again.

 

[puremilk]

but look at the list,how can a 12AU7 equivalents to 12AX7!i wonder how this list made up?

 

[commstech]

0A2 AG5211

 

[commstech]

Basic specs
Twin Triode

 

[commstech]

Specs

http://www.railce.com/cw/casc/tubelist/rxtube/12rhh14.jpg

 

[commstech]

How about Frank's equivalent list?
Wondering how is the list 'made up '...
Frank's Electron tube Pages - Foreign Substitutes for American Types