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Total 5 documents matching your query.

1. LF: Re: Re: Re: Re: TX system at DK7FC, schematic (score: 1): Author: "mal hamilton" <[email protected]>; Date: Tue, 20 Dec 2011 11:54:11 +0100; Jim I have a couple of nice hi power litz wire wound variometers, maybe I should try one. Except the variometer is remotely driven for adjustments the TAP method is better, one tap up or down does th; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-12/msg00026.html (14,106 bytes)
2. LF: Re: Re: Re: Re: TX system at DK7FC, schematic (score: 1): Author: "mal hamilton" <[email protected]>; Date: Sun, 18 Dec 2011 17:27:24 +0100; ps With a Q in thousands the bandwidth even on 137 would be too narrow to be useful but is You pitch can particular 1.3mH,; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-12/msg00198.html (14,045 bytes)
3. LF: RE: Re: Re: Re: TX system at DK7FC, schematic (score: 1): Author: Rik Strobbe <[email protected]>; Date: Sun, 18 Dec 2011 12:25:34 +0100; Mal, Jim, all, maybe the clue is in the filter used by Stefan. A bridged amplifier as used by Stefan is very flexible towards the load resisance, anything between 10 and 100 Ohm will probably give al; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-12/msg00750.html (15,342 bytes)
4. Re: LF: Re: Re: Re: Re: TX system at DK7FC, schematic (score: 1): Author: "mal hamilton" <[email protected]>; Date: Sun, 18 Dec 2011 17:48:42 +0100; Wolf But surely it is the Loaded Q we are concerned about, what is the point of a vy high Q unloaded when put into the antenna system it drops dramatically. Maybe there is a conflict between Theory a; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-12/msg00869.html (15,964 bytes)
5. Re: LF: Re: Re: Re: Re: TX system at DK7FC, schematic (score: 1): Author: wolf_dl4yhf <[email protected]>; Date: Sun, 18 Dec 2011 17:33:43 +0100; Certainly not. What Stefan meant was the coil's *unloaded* Q, which cannot be high enough. The *loaded* Q, in the resonant circuit, will be lower and that's what determines the antenna system's bandw; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-12/msg00877.html (17,278 bytes)

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