[600MRG] Filter Caps Q / ESR - Bandpass Filters

[Brian, WA1ZMS]

FWIW....

I will add that the 500kHz filter works very well and can take real QRO.   The 136kHz version can be a challenge to wind the inductors for. The 52 turn ones just fit the core if you use enamel #14.  The 500kHz coils however were easy to wind with #14 THHN.

-Brian, WA1ZMS
iPhone

> On Oct 5, 2017, at 4:59 PM, Frank Lotito <k3dz at live.com> wrote:
> 
> In the case of bandpass filters for below the broadcast band, have you considered the bandpass filter design buy W1VD, ref: http://www.w1vd.com/500khzpreselector.html?  As I tinkered with this design using ELSIE, the filter analysis software by Tonne Software, www.tonnesoftware.com, I got the feeling that capacitor Q was not the limitation.  It was the Q of the inductors that limited filter performance.
> 
> 
> 
> 73 Frank Lotito  K3DZ / WH2XHA
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> 600MRG at w7ekb.com
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> In the case of bandpass filters for below the broadcast band, have you considered the bandpass filter design buy W1VD, ref: http://www.w1vd.com/500khzpreselector.html?  As I tinkered with this design using ELSIE, the filter analysis software by Tonne Software, www.tonnesoftware.com, I got the feeling that capacitor Q was not the limitation.  It was the Q of the inductors that limited filter performance.
> 
> 
> 
> 73 Frank Lotito  K3DZ / WH2XHA
> _______________________________________________
> 600MRG mailing list
> 600MRG at w7ekb.com
> http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com