Tube differences 6LQ6-6JE6A,C-6MJ6

[357]

Could I get some info on these tubes?

I need to buy new tubes and am looking at 6JE6A (RCA) or 6MJ6 (GE) and 6JE6C.
Why the double name "6LQ6-6JE6"?
What's the A and C suffix mean?

Thank you

 

[357]

I was looking around and I see that I could swap the 6LQ6's with EL509's by swaping pin 3 to pin 9 and shorting pin 2 and 3.
Is it that simple ?

 

[Bionic Chicken]

The JE/LQ are the same tube. Initially the JE and LQ were produced by themselves but they were so close together in specs they got combined. The MJ is a more ruggedized version of the JE/LQ and has a little more plate dissapation. You will get more power out with the MJ's but you will also spend more money on them.

 

[HiDef]

I was looking around and I see that I could swap the 6LQ6's with EL509's by swaping pin 3 to pin 9 and shorting pin 2 and 3.
Is it that simple ?

\

Not always.

EL-509s can have internal connections whose inductance will make your amplifier useless above 20 meters.