On 5/29/2011 13:43, drewko wrote: > If I use a 50uv signal generator to set the filter gains for equal > readings on my K3's AFV meter I arrive at the following compensations: > > 2.70 KHz = 0db > 500 Hz = 4 db > 250 Hz = 8 db > > This is way more aggressive than the suggested amounts but these > figures do sound equalized to my ears for real signal conditions. The > factory settings are noticeably weak. Maybe my particular filters are > just not up to par. > > 73, > Drew > AF2Z > > > On Sat, 28 May 2011 14:18:45 -0700, you wrote: > >> There are recommendations in the K3 Owner's manual (see "Crystal Filter >> Setup", indexed, on page 46) : >> >> Use VFO A to set the gain in dB. In general, you'll want to add 1-2 dB for >> 400-500 Hz filters, and 3-4 dB for 200-250 Hz filters. >> >> and there is a table (with essentially the same guidance) in K3 Utility Help >> for the Filter Configuration page. I've lost the table formatting in >> cut/paste from Help, but here's the information: >> >> Narrow crystal filters tend to have more passband loss than wide filters. >> You can compensate for this effect by specifying an amount of added gain to >> use for each filter in receive mode. Enter the desired gain "boost", in >> decibels, for each filter. You may specify a value between 0 and 8 dB. >> >> Elecraft recommends using the initial loss compensation values below. You >> may wish to further adjust the values for your particular filters. >> >> Part Number Bandwidth Gain >> >> KFL3A-200 0.20 kHz 3-4 dB >> KFL3A-250 0.25 kHz 3-4 dB >> KFL3A-400 0.40 kHz 1-2 dB >> KFL3A-500 0.50 kHz 1-2 dB >> KFL3A-1.0K 1.00 kHz 0 dB >> KFL3A-1.8K 1.80 kHz 0 dB >> KFL3A-2.1K 2.10 kHz 0 dB >> KFL3A-2.7K 2.70 kHz 0 dB >> KFL3A-2.8K 2.80 kHz 0 dB >> KFL3A-6K 6.00 kHz 0 dB >> KFL3B-FM 13.00 kHz 0 dB >> >> 73 de Dick, K6KR >> >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1375 / Virus Database: 1509/3665 - Release Date: 05/28/11 > >
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