[ARC5] BC-455 IFT - measurements

Kenneth G. Gordon kgordon2006 at frontier.com
Wed Oct 29 12:42:51 EDT 2014


On 29 Oct 2014 at 7:47, Fuqua, Bill L wrote:

> I should have said that C14 couples signal from L6 to grid of first IF.
> C14 is 180pf also but it is in series with much less capacitance that consist of
> Grid to ground capacitance of first IF in parallel with the interwinding
> capacitance of the L7 and stray capacitance of wiring to ground. 
>   Plate capacitance to ground of mixer is directly across L6 more or less.

Yes. I noticed all that too.

I STILL cannot understand why they did it that way...

Was it really that necessary to have such "poor" (to us) selectivity?

Ken W7EKB


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