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1. LF: [500] Low pass filtering (score: 1): Author: [email protected]; Date: Mon, 16 Apr 2007 00:14:49 +0200; Hi David, I built that Chebyshev low pass filter. the attenuation here is 36dB at the second and 63dB at the third harmonic ? that?s what I expected. now my class D PA can be switched to the 137kHz L; /rsgb_lf_group-archives/html/rsgb_lf_group/2007-04/msg00011.html (10,348 bytes)
2. LF: [500] Low pass filtering (score: 1): Author: [email protected]; Date: Thu, 5 Apr 2007 19:02:21 EDT; Hi all. I've had a couple of mails asking about harmonic filters for 500kHz transmitters. I sat down today and built a 7 element Chebyshev low pass. It seems quite forgiving on components and gives -; /rsgb_lf_group-archives/html/rsgb_lf_group/2007-04/msg00326.html (8,115 bytes)

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