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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+3rd\s+Order\s+IMD\s*$/: 7 ]

Total 7 documents matching your query.

1. [Amps] 3rd Order IMD (score: 1)
Author: "David C. Hallam" <dhallam@rapidsys.com>
Date: Wed, 21 Sep 2005 17:45:19 -0400
Looking through Bill Orr's handbook, I found a table that gives the 3rd order IMD for 6146's in AB1 as about -24/25 db. If that's the case, how can your signal be any cleaner than that as long as the
/archives//html/Amps/2005-09/msg00273.html (6,554 bytes)

2. Re: [Amps] 3rd Order IMD (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Wed, 21 Sep 2005 16:20:29 -0700
The KWM2 uses negative feedback so that the output of the transmitter is cleaner than the 6146 tubes. Collins is excellent in using negative feedback to clean up the signals - which is why the Collin
/archives//html/Amps/2005-09/msg00277.html (6,973 bytes)

3. Re: [Amps] 3rd Order IMD (score: 1)
Author: R.Measures <r@somis.org>
Date: Thu, 22 Sep 2005 07:06:14 -0700
Because 6146 amps typically use RF-NFB, the total IMD is c. 38db from pep. Richard L. Measures, AG6K, 805.386.3734. www.somis.org _______________________________________________ Amps mailing list Amp
/archives//html/Amps/2005-09/msg00286.html (7,546 bytes)

4. Re: [Amps] 3rd Order IMD (score: 1)
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Thu, 22 Sep 2005 20:03:46 +0200 (CEST)
Caveat: Well designed 6146 amps use NFB. Not all of them do..... 73 Peter W6/G3RZP (San Diego this week). _______________________________________________ Amps mailing list Amps@contesting.com http://
/archives//html/Amps/2005-09/msg00293.html (7,425 bytes)

5. Re: [Amps] 3rd Order IMD (score: 1)
Author: "David C. Hallam" <dhallam@rapidsys.com>
Date: Thu, 22 Sep 2005 14:34:12 -0400
As much as I believe Hallicrafters and Johnson are well designed transmitters, I don't believe they use NFB in their finals. The equipment at my QTH is exclusively boat anchor. David KC2JD --Original
/archives//html/Amps/2005-09/msg00295.html (7,772 bytes)

6. Re: [Amps] 3rd Order IMD (score: 1)
Author: R.Measures <r@somis.org>
Date: Fri, 23 Sep 2005 01:20:10 -0700
Collins did. Kenwood (TS-820, TS-830) copied Collins. Richard L. Measures, AG6K, 805.386.3734. www.somis.org _______________________________________________ Amps mailing list Amps@contesting.com http
/archives//html/Amps/2005-09/msg00303.html (7,721 bytes)

7. Re: [Amps] 3rd Order IMD (score: 1)
Author: R.Measures <r@somis.org>
Date: Fri, 23 Sep 2005 01:27:31 -0700
Correct, David. Only Collins and Kenwood used RF-NFB, Hallicrafters 6146 SSB transmitters were quite noticably feculent. California is a terrible place to live. Richard L. Measures, AG6K, 805.386.373
/archives//html/Amps/2005-09/msg00304.html (8,598 bytes)

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