please help identify these two tube

[sagitis]

the only marking i could see is 508, down there is writing is 7L8*5B

 

[martyh]

7L8 is the code for 6922

 

[sagitis]

7L8 is the code for 6922

Hmm just wondering why ther is no referencing that ECC88 = 7L8 or 6922 = = 7L8, but there are interenet that reference ECC88 = 6922

 

[martyh]

https://frank.pocnet.net/other/Philips/PhilipsCodeListAB.pdf This has all the info you need to identify. 7L is the type 8 is the iteration and the 3 digits below contain factory + year and month codes

 

[Kay Pirinha]

6922 has similar data as ECC88, but isn't the same tube, als 6922 is a SQ valve, same as it's European equivalent E88CC. ECC88's JEDEC code is 6DJ8.

Best regards!

 

[kodabmx]

And of course 6N23P and 6N11J are also equivalents.