tag:blogger.com,1999:blog-1884813335467222359.post6656224279652726419..comments2023-04-15T01:38:12.460-07:00Comments on Electronics (& Radio) Projects: Low Pass Filter (Chebyshev) for 88-108 FM Broadcast BandDJ Adam Evehttp://www.blogger.com/profile/03434910313305297289noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-1884813335467222359.post-38891530962708996142017-02-13T11:35:54.844-08:002017-02-13T11:35:54.844-08:00I've build this filter but instead of using ca...I've build this filter but instead of using capacitors I used trimmers. This works awesomely!! You can tune the filter in such a way that your desired frequency lies at the top of a passband ripple and thus there is practically no loss of power. Plus you can get the SWR down to real 1 to 1 I mean even if I turn the forward power knob all the way open the needle for reverse power doesn't move. So it also acts as an antenna matcher although your antenna does need to have a good SWR without the filter. This filter can't work miracles. I encourage everyone to build this and use trimmers instead of capacitors and you'll see what I mean. I tested this in simulation software and the filter keeps doing its job perfectly.Eddy Bergmanhttps://www.blogger.com/profile/13286799069112368259noreply@blogger.comtag:blogger.com,1999:blog-1884813335467222359.post-79899393597145900882016-04-12T06:01:02.533-07:002016-04-12T06:01:02.533-07:00Hello. This is interesting I'll do it soon.Hello. This is interesting I'll do it soon.Anonymoushttps://www.blogger.com/profile/01030030404015867350noreply@blogger.comtag:blogger.com,1999:blog-1884813335467222359.post-60642074875747619442016-02-23T01:02:01.889-08:002016-02-23T01:02:01.889-08:00Why you say with -60dB or better if at ~170MHz it ...Why you say with -60dB or better if at ~170MHz it is only about -30dB?Anonymoushttps://www.blogger.com/profile/05695757007679831080noreply@blogger.com