[ARC5] ARC-5 and SCR-274-N IF Transformers

[Leslie Smith]

Ken "G" wrote: 
> "I just checked the schematics [for the I.F. system]  and those [taps]  are 
> clearly shown there. I had never noticed that before. Thanks !"
> 
> In fact, they are drawn as being center-tapped.
> 
> In other words, both the plate at one end and the grid at the other are 
> "tapped down" on the coils.
> 
> This would make both the plate at one end and the grid at the other end  
> connected to lower-impedance points on their respective tuned circuits.
> 
> I cannot remember at the moment what this does (although I know it is
> very  significant) but I SUSPECT that it broadens the IF peak.
> 
Ken, my hunch is the opposite.  I think tapping down the coil reduces
the resistive load on the LC tank components.
I guess (and that's all it is) is that this sharpens the "nose" of the
selectivity curve.
> 

73 de Les.

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