[Boatanchors] 6146 vs 6146A vs 6146B or 6146W

[James Liles]

Hi Glen and all:

Your statement is a valid question:

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"Finally, why did RCA (and a number of the other tube manufacturers) keep on 
making the earlier versions simultaneously with the later version if the 
characteristics of the tubes were identical?"

Glen, K9STH

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The entire post by all has been interesting with the exception of the same 
old boring gang that cannot control their sarcastic, narcissistic comments 
e.g. "that’s over the top ".


There are methods to disagree that are constructive and intellectually 
beneficial to all of us.  The notion that anyone who uses a 6146* or for 
that matter any recommendations from this or any other reflector blindly 
following, without verification a suggestion, is simply without merit.  If 
one should choose to accept the advice and not verify the information, what 
is the harm?  So he used a 6146A rather than a 6146B and his equipment works 
fine.  He's happy that all is well until he reads the nasty comments on this 
thread.  Now he's looking for a design that will implement eight 807's or 
twenty seven 6L6's or maybe tearing the kitchen microwave apart to scrounge 
whatever tube that mysterious device used to deliver such power to a pork 
chop.

The reason that I followed with interest is the history of the 8122 seems to 
draw a parallel.  Some amplifiers will work with any 8122 and others will 
only work with about 3/4 of the production without modification, and others 
cannot be made to operate properly with nearly 1 in 6 8122's.  There is a 
broad range of bias and neutralization attributes involved.  Burle is the 
only manufacturer that classified them with a four color code to enable 
intelligent choice.

Kindest regards Jim K9AXN