[ARC5] Bandwidth for IF Transformers

[Kenneth G. Gordon]

On 17 Mar 2016 at 1:22, J Mcvey via ARC5 wrote:

> 
> The ARC-5 manual page 60 has table 6-4 which has selectivity measured as a
> function of input . The R-24 at 2X "standard output" is listed as 1.1KHZ . I
> guess a weaker signal would be better but the worst case scenario at 1000X is
> 4.5KHZ It does not say if the rods are in or out, but I suppose it's in broad
> mode since most of the others are not adjustable and there is no asterisk.

Jim:

If you look closely at HOW they got that figure of 1.1 kHz, you will see that it 
is from the "nose" of the selectivity curve to ONE SIDE.

Therefore, the actually width of the selectivity curve at 2X (6 dB) down, is 2.2 
kHz, and at 1000X (60 dB down) the width of the selectivity curve is then 9 
kHz.

Ken W7EKB