Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Q\s+and\s+parasitics\.\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Q\s+and\s+parasitics\.\s*$/: 9 ]

Total 9 documents matching your query.

1. [AMPS] Q and parasitics. (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 18 Jun 2001 08:50:13 +0100; Looking at the 1946 ARRL handbook last night (when I got it at Dayton this year, someone asked if I was modernising the station!) A number of their tx's have parasitic suppressors consisting of air w; /archives//html/Amps/2001-06/msg00135.html (8,741 bytes)
2. [AMPS] Q and parasitics. (score: 1): Author: 2@vc.net (2); Date: Mon, 18 Jun 2001 08:08:25 -0700; 1/2 sufficient and miss /\ so it seems, Peter /\ good point. 813s won't osc. with no parasitic suppressor whatsoever. /\ Before I wrote the October, 1988 *QST* article on parasitics, I brainstormed; /archives//html/Amps/2001-06/msg00137.html (9,350 bytes)
3. [AMPS] Q and parasitics. (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 18 Jun 2001 16:20:45 +0100; Dunno about that (I've never tried, but I've never had parasitics in an 813 stage, even without stoppers), but most of these designs were for triodes. The odd pentode - HK257 and the like - but mainl; /archives//html/Amps/2001-06/msg00138.html (8,703 bytes)
4. [AMPS] Q and parasitics. (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 18 Jun 2001 10:36:45 -0500; Hi Peter, and fellow "Ampers." There was a construction article in the January 1974 issue of Ham Radio Magazine by John R. True, W4OQ entitled "Five-Band Kilowatt Amplifier" which used a single 4-100; /archives//html/Amps/2001-06/msg00139.html (7,886 bytes)
5. [AMPS] Q and parasitics. (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 18 Jun 2001 16:45:16 +0100; I think that's the key comment. The 1946 handbook circuits had no resistive loading at all. All the circuits looked slightly dodgy - no screening, quite long leads on neutralising caps, nice open con; /archives//html/Amps/2001-06/msg00141.html (7,747 bytes)
6. [AMPS] Q and parasitics. (score: 1): Author: kc4slk@csrlink.net (Mike Sawyer); Date: Mon, 18 Jun 2001 17:01:52 -0400; Dunno about that (I've never tried, but I've never had parasitics in an 813 stage, even without stoppers), but most of these designs were for triodes. The odd pentode - HK257 and the like - but mainl; /archives//html/Amps/2001-06/msg00146.html (10,093 bytes)
7. [AMPS] Q and parasitics. (score: 1): Author: 2@vc.net (2); Date: Mon, 18 Jun 2001 18:21:18 -0700; /\ We supply a ferrite VHF attenuator bead in our suppressor retrofit kit for the Henry 2K-4 and 3K-A. The bead helps to isolate the HV-RFC's self resonance near 95MHz from the parasitic osc. at 95M; /archives//html/Amps/2001-06/msg00148.html (9,246 bytes)
8. [AMPS] Q and parasitics. (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 19 Jun 2001 07:16:15 +0100; than the You've got me interested with that! How come? What was the mechanism? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative request; /archives//html/Amps/2001-06/msg00149.html (7,504 bytes)
9. [AMPS] Q and parasitics. (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Tue, 19 Jun 2001 07:49:30 +0100; 6146s, gate satisfactory. I suspect one of the problems with ferrite beads is the unknown and/or not understood characteristics of so many in circulation, especially when one from the junkbox is used; /archives//html/Amps/2001-06/msg00150.html (7,687 bytes)

Current List: 1 - 9
Page: [1]