Click on the small pictures for bigger ones.

E88CC inside
E88CC inside		 EL34 inside
EL34 inside		 ECC83 inside
ECC83 inside		 ECC82 inside
ECC82 inside

The amplification of a tube is amongst others determined by the grid spacing. Note that the gridspacing of the ECC83 (mu=100) is much smaller than the grid spacing of the ECC82 (mu=17)

4043C SFR
4043C SFR		 V2044/C944 Mazda
Mazda V2044/C944
The oldest tube I have ever seen		 250
250, rare and beautiful

Unknown, but beautiful
Unknow pentode		 8252W/4PR60C
8252W/4PR60C EIMAC		 E140 SFR
E140 SFR		 100TH Eimac
100TH EIMAC