[Inkthinker2]

Hello! 

I am new to this forum.  I am remodeling a Philco 38-14 table top radio with improvements to eradicate the hum. Several tubes look decent but I do need to replace Types 6A7. 78 and 75. The other two 25Z5 and 43 (output) look fine. I've been online and cannot seem to find the Philco brand but since my 43 is an RCA, is it possible to use other brands? Perhaps someone has a chart that references other compatible tubes. 

Thanks! 
Meghan in Colorado