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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+harmonics\s+\/\s+LF\s+antenna\s*$/: 7 ]

Total 7 documents matching your query.

1. Re: LF: harmonics / LF antenna (score: 1)
Author: "Hans-Joachim Brandt" <[email protected]>
Date: Mon, 14 May 2001 19:46:01 +0200
Thanks, dear Rik, I am also employing a combination of a peaked low-pass filter and a normal low-pass filter in the tank circuit. Furthermore I have tried to receive my second harmonic in the lf broa
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00179.html (12,250 bytes)

2. Re: LF: harmonics / LF antenna (score: 1)
Author: "Rik Strobbe" <[email protected]>
Date: Fri, 11 May 2001 14:33:29
Hi Ric, In my calculations I assumed a perfect (capacitance free) coil. I found out that my 4.5mH loading coil has a self resonance just above 700kHz, so upward from there the reactance will drop rap
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00210.html (11,558 bytes)

3. RE: LF: harmonics / LF antenna (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Fri, 11 May 2001 07:25:26 +0100
At 14:59 10/05/01 Thursday, Andy wrote: The local Non Directional Beacon here, EAS at Southampton Airport on 391.5kHz, puts out strong odd order harmonics. The fifth harmonic on 1957.5 actually cause
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00213.html (8,695 bytes)

4. Re: LF: harmonics / LF antenna (score: 1)
Author: "Richard Rogers" <[email protected]>
Date: Fri, 11 May 2001 09:10:53 +1000
G'day, Robert, AX2TAR, tried his switch mode LF transmitter without a low pass filter. His 3rd harmonic was just visible on Argo, but his 19th harmonic at about 3.3MHz was S9 here about 10km away. Th
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00215.html (10,828 bytes)

5. RE: LF: harmonics / LF antenna (score: 1)
Author: "Talbot Andrew" <[email protected]>
Date: Thu, 10 May 2001 14:59:51 +0100
The local Non Directional Beacon here, EAS at Southampton Airport on 391.5kHz, puts out strong odd order harmonics. The fifth harmonic on 1957.5 actually caused QRM once. The third harmonic is masked
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00227.html (9,088 bytes)

6. LF: harmonics / LF antenna (score: 1)
Author: "Rik Strobbe" <[email protected]>
Date: Thu, 10 May 2001 13:27:36
Hello group, few days ago I got a mail from someone new to LF who asked me how efficient a vertical antenna would surpress the harmonic contests from the TX. So far I hadn't put much thought on that
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00228.html (12,647 bytes)

7. Re: LF: harmonics / LF antenna (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Thu, 10 May 2001 14:02:05 +0100
So sending a few 100W square wave into a big antenna is not really recommended. 73, Rik ON7YD We had a Loran-C transmitter design in 1980 that delivered a square wave into the antenna and depended o
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00229.html (11,231 bytes)


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