[sturob]

Just a quick couple of questions on the RCA 6SN7GTA.

I've got a single pair of these tubes which actually seem like a very nice 6SN7 variant. They have two side getters, directly opposite each other and at right angles to the plates (meaning, you can look at the flat side of the plates, but the gap between the plates if you're looking at the edge is obscured by the getters). Why two getters?

Also, what's up with this tube? Seems like RCA made 6SN7GTs for quite a while, made the GTAs for a very short time, and then moved right into GTBs. Is my perception correct?

Thanks,

Stuart