[Milsurplus] 348 loose ends

[Unserviceable but Repairable]

AVC.  Mike right where u sed - p.1111 of my '52 4th ed'n of Radiotron
big red.  But I sorta think the triode RFA there was for illustration.  
If you go to pg. 942 on RFAs, only pentodes considered

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The 348J triode RFA.  It's coupled to 2nd pentode RFA via RC shunt-feed
where 15k resistor 'way less than plate resistance so gain low.  I think 
so-done so 1st stage adds little to system gain but, instead, provides xtra
selectivity 'causa the xtra tuned ckt.  Besides, this seems last of series
& there was a giant 348-factory turning all the rest of the '348 system'
at a furious pace & this allowed use of old (6K7, etc designs) w. new (6SK7,
etc. designs).  Just a gess, but I bet the right 1.  Will provide 10 6J6s 
to 1st guy to prove otherwise

I have Clark & Caramba(sp) that has 348 E,M,P diag. & separate diag. for J.  
Lucky for support of this thread.  Note on E,M,P.  Odd suffix-family
coincidence, huh?

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Variable mu triodes.  Someone once sed the 6C5 upon disection was just a 6K7 
w/o a top cap.  Metal enclosure supports that theory.  I wonder

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3/2 power law as applied to several tube designs.  Thanks, I needed that!
(no kiddin', was neat story)

There, it's all out

   Marty