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1. Re: LF: low pass filter for power use (score: 1): Author: [email protected]; Date: Thu, 3 Nov 2005 16:27:36 EST; In a message dated 03/11/2005 16:23:39 GMT Standard Time, [email protected] writes: Hi Lf's in all circuit diagrams I find filters like 12nF-->54uH-->27nF-->54uH-->12nF here is the 3db point at 250k; /rsgb_lf_group-archives/html/rsgb_lf_group/2005-11/msg00179.html (8,845 bytes)
2. Re: LF: low pass filter for power use (score: 1): Author: Rik Strobbe <[email protected]>; Date: Thu, 03 Nov 2005 17:37:20 +0100; Hello Tom, I believe the first one is the "G3YXM filter". The pitfalls when using a 147 kHz filter might be: - higher attenuation at 137 kHz - more sensitive to changes of the antenna impedance (if t; /rsgb_lf_group-archives/html/rsgb_lf_group/2005-11/msg00190.html (11,063 bytes)
3. LF: low pass filter for power use (score: 1): Author: "Thomas Eckart" <[email protected]>; Date: Thu, 3 Nov 2005 17:21:52 +0100; Hi Lf's in all circuit diagrams I find filters like at 250khz. Has anyone test a filter in this configuration 47nF--> 147khz. The 2. filter gives a better suppress of the harmonics! Wat is the reason; /rsgb_lf_group-archives/html/rsgb_lf_group/2005-11/msg00191.html (10,003 bytes)

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