Same amplifier !  Different tube !   Different voice !
Trying different voice by tube and adapter.Needn't change tube amplifier anything.Just connect tube and socket adapter.

Brand: Amptata
Quantity : One
Top is ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021.  Bottom is 6EU7.
Copper used for excellent conductivity.
Outstanding soldering taken in every adapter.
Accept custom manufacturing,if you need other types, please contact me.
Ceramic socket and gold pins for long life,Tough gold pins with a thick gold plating.

The design of your tube amplifier is the use of 6EU7. 
If you want to try ECC83 or 12AX7 12AU7 12AT7 ECC81 ECC82 7025 CV4003 CV4004 5751 5814 6021. 
Only need to connect your tube and the adapter socket in together.
Then connect to your amplifier,begin to enjoy music.
Needn't change anything about your amplifier.
DataCaciques