[Hallicrafters] SX-42 BFO mod

[HallicrafterSX28 at aol.com]

Hi all
On the earlier versions the BFO was injected into the 2nd detector stage  
just like any other rcvr.However on the later versions of the Sx-42 the BFO was  
coupled to the grid of the 2nd IF amplifier which amplified the BFO before it  
got to the 2nd detector.Performance on SSB is much better with this latter 
type  of injection.
Nick



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