[Hallicrafters] 6H6 tubes for my SX-42

[brian.crawford at shaw.ca]

I'm replacing the 6H6 tubes (among others) in my SX42.  This tube comes
as 6H6, 6H6G and 6H6GT (at different prices).  The service manual simply
states a 6H6 (the tubes are small metal ones).  In fact none of the
tubes in the manual give any extension (G or GT).  Is there a specific
difference I should be concerned about (should probably know this but
don't recall, too many years ago)?
I'm looking at buying them online (won't mention company) unless someone
on the forum has a better suggestion(s) as to where to locate them (at a
min. 2  6H6s,   1  0D3,   1  6SK7GT
 
Thanks all
VE7BGC


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