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1. LF: Low pass filter 1 kW 136k 472 k what components to choose? (score: 1): Author: "Hans-Albrecht Haffa" <[email protected]>; Date: Sun, 21 Dec 2014 16:38:16 +0100; Dear OMs, just a question strait forward: What componnets I should choose for a low pass filter for 136 kHz and 472 kHz, two filters to be designed. 136 kHz: Pin abt 1,5 kW 472 kHz: Pin abt 0,5 kW SW; /rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00196.html (10,118 bytes)
2. Re: LF: Low pass filter 1 kW 136k 472 k what components to choose? (score: 1): Author: John Andrews <[email protected]>; Date: Sun, 21 Dec 2014 11:01:00 -0500; Hans-Albrecht, W1VD and I use the "half-wave" filters described at: http://www.w1vd.com/LPF.html Jay's method of construction probably has a better HF/VHF stop-band, but I have gotten away with a sin; /rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00198.html (11,024 bytes)
3. Re: LF: Low pass filter 1 kW 136k 472 k what components to choose? (score: 1): Author: "stan, W1LE" <[email protected]>; Date: Sun, 21 Dec 2014 12:52:42 -0500; Wie Gehts, Here is one suggestion: http://www.w1vd.com/LPF.html Stan, W1LE Cape Cod FN41sr On 21-Dec-14 10:38 AM, Hans-Albrecht Haffa wrote: Dear OMs, just a question strait forward: What compon; /rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00200.html (11,138 bytes)
4. Re: LF: Low pass filter 1 kW 136k 472 k what components to choose? (score: 1): Author: DK7FC <[email protected]>; Date: Sun, 21 Dec 2014 23:00:16 +0100; Hi Hans, T200-2. They may need a small fan on LF if you want to run e.g. WSPR-15 but for CW/QRSS it will work without one. 73, Stefan PS: I know it. Am 21.12.2014 16:38, schrieb Hans-Albrecht Haffa:; /rsgb_lf_group-archives/html/rsgb_lf_group/2014-12/msg00202.html (11,477 bytes)

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