2A3 Tube Opinions

I've not tried very many 2A3 tubes in my Welborne Labs Moondogs , but the best sound I got was with the " mesh Plate " Sophia Electric 300B with 2.5 volt filaments that work in any 2A3 amplifier . More of everything compared with either of the NOS I tried or the Shuguang 2A3c . The driver tube has a lot to do with the sound, as do the coupling capacitors . But the latter aren't plug n play .  FWIW
                                         Joe

Reviving this thread. I just got two (well three but I dropped one and it was damaged) 2a3 tubes from a swap meet. One is a RCA/Cunningham mono black plate and the other is dual box plate Raytheon. Are these good 2a3's? Is there a place in Los Angeles that will test them for a fee? 

@enobenetto Not sure if he will do it for free but Upscale Audio definitely has the equipment to test those tubes.  

@verdantaudio Thanks a bunch!! I will try them and hopefully they will be cool with. I don't mind paying them a fee (reasonable fee). 

@dekay  @biketech60 @larryi and others...

Your recommendations for 7A4 driver tubes for a 2A3 amp?

It is the exact same amp in this thread by @arthursmuck  [I purchased it from Arthur].

I believe the amp came with Sylvania 7A4s, though the lettering isn't clear. I'm currently running Philcos. Thanks.