No idea on the first part.
...
also while I'm on the topic of tubes the Russian 6N1P is the same as 12AU7 and 6N2P same as 12AX7?! is that right?
I think but I tried using a 6N1P in a 6N2P circuit and got no output, might just be that I was using used tubes that were sitting in an attic since the 80s
Yes, they are electrically similar. Compare the datasheet pinouts though - 12A*** have centre tapped 6.3/12.6V heater. 6N** are 6.3V heater, no centre tap (they provide a screen between the two triodes instead). That would be a good reason for them not working.
If buying 6n1P / 6n2p, then go for the -ev military spec versions from the Voskhod factory, they tend to have better element matching and lower distortion.
P.S. If looking for low-cost output tubes for triode configuration, also consider the GU50. Very tough and twice the Anode dissipation of the 6P7S. No high voltage anode top cap to worry about. Note that they are 12.6V heater though and very specific socket.
yes, I know that 12A** doesn't work in 6N*P circuits or vise versa without modifying some pinout on the socket.
also, I didn't say that I was gonna use power tubes in a triode config.
also, I am probably gonna use the 6GB6G's cause they look cool

and also they are a bit cheaper. but if I make a switch that connects the screen to the plate when I want to I can't put 700+ volts on the plate anymore

but I guess if I have 350v on the screen and 700+v on the plate it will be really compressed anyway.
6BG6B is similar to 6L6GT. This will have a different “tone” to 6V6GT, as the characteristics are different. AFAIK, 6V6 is an older lower-powered tube.
oh, thanks!
if the 6GB6G is similar to a 6L6GC it will probably have more power output than using 6V6GT's.
also, I'm really confused about Plate dissipation and Power Output.
are those the same? I mean if I have a 30 watt dissapation and 2 tubes in push pull output will I have ~60watts of output?
also, is there any cheap Russian or any substitute for KT150 tubes?
edit: wait... GU50's are pentodes, not triodes!
I have considered them but it seems like too overkill for me, I just want something with less than ~60watts for now