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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TenTec\]\s+Re\:\s+1\s+kHz\s+IMD\s+with\s+Preamp\s+ON\/OFF\s*$/: 7 ]

Total 7 documents matching your query.

1. [TenTec] Re: 1 kHz IMD with Preamp ON/OFF (score: 1)
Author: "Marijan Miletic, S56A" <s56a@bit.si>
Date: Mon, 22 Dec 2003 21:56:31 -0000
http://antennspecialisten.se/~sm5bsz/dynrange/intermod.htm This is a good EU reading for the explanations of IMD3 deviations. 73 de Mario, S56A, N1YU _______________________________________________ T
/archives//html/TenTec/2003-12/msg00828.html (7,137 bytes)

2. [TenTec] Re: 1 kHz IMD with Preamp ON/OFF (score: 1)
Author: "Marijan Miletic, S56A" <s56a@bit.si>
Date: Tue, 23 Dec 2003 10:39:32 -0000
Each crystal has series and parallel resonance which makes 8 pole filter! It is difficult to achieve 1 kHz filter shape factor better then 1:3 at 9 MHz. 73 de Mario, S56A, N1YU _____________________
/archives//html/TenTec/2003-12/msg00860.html (7,027 bytes)

3. [TenTec] Re: 1 kHz IMD with Preamp ON/OFF (score: 1)
Author: Bill Tippett <btippett@alum.mit.edu>
Date: Tue, 23 Dec 2003 06:41:02 -0500
MHz. Really? It must be much easier for other bandwidths... ;-) 73, Bill W4ZV http://www.qth.com/inrad/tentec_menu.htm Filter 6 db BW Shape Factor Inrad 760 315 2.2:1 Inrad 759 455 2.1:1 Inrad 761 19
/archives//html/TenTec/2003-12/msg00861.html (7,815 bytes)

4. RE: [TenTec] Re: 1 kHz IMD with Preamp ON/OFF (score: 1)
Author: "John L Merrill" <jmerrill1@adelphia.net>
Date: Tue, 23 Dec 2003 07:01:31 -0500
Don't want to start any arguments but it's a 4 pole filter. Each crystal has series and parallel resonance which makes 8 pole filter! It is difficult to achieve 1 kHz filter shape factor better then
/archives//html/TenTec/2003-12/msg00863.html (8,662 bytes)

5. Re: [TenTec] Re: 1 kHz IMD with Preamp ON/OFF (score: 1)
Author: Sinisa Hristov <shristov@ptt.yu>
Date: Tue, 23 Dec 2003 07:09:59 -0500
Well, formally that's correct, but for ages it has been customary to indicate number of poles according to the equivalent low-pass filter. For bandpass filters this means 4 crystals = 4 "poles". Inr
/archives//html/TenTec/2003-12/msg00864.html (8,065 bytes)

6. [TenTec] Re: 1 kHz IMD with Preamp ON/OFF (score: 1)
Author: Barry N1EU <n1eu@yahoo.com>
Date: Tue, 23 Dec 2003 04:51:35 -0800 (PST)
better then 1:3 at 9 MHz. http://www.qth.com/inrad/graphs/718.gif 1.6:1 shape factor with 1000hz bandwith at 8.2Mhz 73 & Happy Holidays, Barry N1EU __________________________________ Do you Yahoo!? N
/archives//html/TenTec/2003-12/msg00866.html (7,693 bytes)

7. [TenTec] Re: 1 kHz IMD with Preamp ON/OFF (score: 1)
Author: "Marijan Miletic, S56A" <s56a@bit.si>
Date: Tue, 23 Dec 2003 20:23:39 -0000
Others also pointed on specialist Inrad filters but they come at the price! DSP takes care of final shapes and audio must be tailored accordingly. 73 de Mario, S56A, N1YU ___________________________
/archives//html/TenTec/2003-12/msg00882.html (7,864 bytes)

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