Mail Archive Search: <toroid tank coil>

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References: [ toroid: 989 ] [ tank: 6174 ] [ coil: 5661 ]

Total 215 documents matching your query.

61. [AMPS] Smallest practical 1.5KW 20uH coil (score: 177): Author: wc6w@juno.com (Radio WC6W); Date: Wed, 26 Jan 2000 23:27:39 EST; beenthinking space producers Hi Harald, I met Bob (W6YUY) when we both worked at the same company in the early '80's. Bob passed away about 8 years ago and I "inherited" one of his coils constructed; /archives//html/Amps/2000-01/msg00537.html (11,599 bytes)
62. Re: [Amps] 160M PI network Toroidal Coil (score: 174): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 7 Oct 2013 12:23:15 -0400; ORIGINAL MESSAGE: (may be snipped) You are wrong regarding the loss. The loss isn't "essentially zero", unfortunately. Such a coil will likely end up having a Q between 300 and 350, perhaps lower if; /archives//html/Amps/2013-10/msg00098.html (10,642 bytes)
63. Re: [Amps] 160M PI network Toroidal Coil (score: 174): Author: "Peter Voelpel" <dj7ww@t-online.de>; Date: Sun, 6 Oct 2013 14:02:59 +0200; Is that a 160m mono band amp with a loaded Q of 12 in the tank circuit or is your 160m toroid coil just delivering one halve or less of the total inductance on 160m? 73 Peter ORIGINAL MESSAGE: (may b; /archives//html/Amps/2013-10/msg00068.html (9,907 bytes)
64. [AMPS] Smallest practical 1.5KW 20uH coil (score: 172): Author: harald.gule@mimer.no (Harald Garberg Gule); Date: Wed, 26 Jan 2000 22:27:16 +0100; Hi all I have been following this tread with great interest. I have also been thinking abouth using toroids in the tank cirkuit, as they seem to offer at least space saving whenever that is a problem; /archives//html/Amps/2000-01/msg00536.html (12,092 bytes)
65. Re: [Amps] Tank circuit Q (score: 170): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Tue, 17 Apr 2007 18:06:43 -0400; If he has the same grid current and same plate current at the same drive he has not changed to operating loadline. If he does NOT have the same grid current then he simply needs to reach up and turn; /archives//html/Amps/2007-04/msg00182.html (9,417 bytes)
66. [Amps] More on Toroidal Tank Circuit Issues (score: 168): Author: "Jim W7RY" <w7ry@centurytel.net>; Date: Fri, 21 Mar 2014 13:08:35 -0700; I may have to eat some crow here about using dedicated toroids on 160 and 80 meters... I built an 8877 amplifier based on the K8RA (SK) 3CX1500D7 amplifier. http://www.k8ra.com/index_049.htm Mine is; /archives//html/Amps/2014-03/msg00124.html (8,400 bytes)
67. [AMPS] Heathkit SB-1000 coil and choke values? (score: 168): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 25 Apr 1999 07:45:41 -0700; I replaced the choke in mine with one purchased from Ameritron <http://www.ameritron.com>. It works fine on all bands 160-10, including WARC. Cost about $25. The AL80B choke is the one to ask for. I; /archives//html/Amps/1999-04/msg00390.html (9,206 bytes)
68. Re: [Amps] 160M PI network Toroidal Coil (score: 161): Author: "Carl" <km1h@jeremy.mv.com>; Date: Tue, 8 Oct 2013 16:26:51 -0400; Ive used 7 mix cores for SS VFO's that are rock solid. Dont use the smallest core you can squeeze the smallest wire on and use a Hi-C circuit. They sure put out a clean signal on the SA compared to D; /archives//html/Amps/2013-10/msg00136.html (13,012 bytes)
69. [AMPS] Heathkit SB-1000 coil and choke values? (score: 161): Author: nospam4me@juno.com (Skip S Isaham); Date: Sun, 25 Apr 1999 03:19:10 EDT; Re: SB-1000 coil/choke values Hello, I came across a used SB-1000 real cheap with blown, missing, and questionable parts. Would anyone be able to provide me with the following, please? Inductance val; /archives//html/Amps/1999-04/msg00388.html (7,890 bytes)
70. Re: [Amps] Guidelines.....toroids for tank ckts (score: 157): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sat, 24 Mar 2012 18:24:38 -0400; I would not recommend toroids above 40M and even there its iffy at high power. And of course use one per band. My Alpha 76PA ran strictly in a Carribean contest station before I got it and the tank c; /archives//html/Amps/2012-03/msg00260.html (8,912 bytes)
71. Re: [Amps] 160M PI network Toroidal Coil (score: 153): Author: Tom Thompson <tlthompson@qwest.net>; Date: Tue, 08 Oct 2013 14:09:42 -0600; The SI570 chip is an interesting alternative for a DDS. I have measured the phase noise at -139 dBc/Hz at 10 kHz away from the carrier. It does require a microprocessor to load the registers but it i; /archives//html/Amps/2013-10/msg00135.html (13,474 bytes)
72. Re: [Amps] 160M PI network Toroidal Coil (score: 153): Author: peter chadwick <g8on@fsmail.net>; Date: Tue, 08 Oct 2013 21:36:11 +0200; Manfred, it is interesting to look at the WW2 German radio equipment - obviously designed pre-1939. The use of ceramics, especially in capacitors, and iron cores is interesting, to say the least. bee; /archives//html/Amps/2013-10/msg00133.html (11,531 bytes)
73. Re: [Amps] Guidelines.....toroids for tank ckts (score: 153): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Sat, 24 Mar 2012 18:00:16 -0700; See the latest ARRL handbooks for the 3CX1500 amplifier by Jerry K8RA. He uses toroids for 80 and 160. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.co; /archives//html/Amps/2012-03/msg00266.html (9,144 bytes)
74. Re: [Amps] 160M PI network Toroidal Coil (score: 149): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Tue, 08 Oct 2013 18:25:21 +0000; Peter, The numbers I've seen for flux density suggest that at 160m, you should be at no more than 100 gauss or 10 mT for reasonable losses and linearity.......and preferably a bit less. Yes, that's a; /archives//html/Amps/2013-10/msg00131.html (11,482 bytes)
75. Re: [Amps] Guidelines.....toroids for tank ckts (score: 149): Author: "Roy" <royanjoy@ncn.net>; Date: Sat, 24 Mar 2012 15:17:33 -0500; 'T'was asked, "I'm looking at alternatives to rebuild a tank circuit in a 1.5kw HF amp. I'm interested in using toroids rather than air-core coils and with that, a different (non-tapped, separate coi; /archives//html/Amps/2012-03/msg00258.html (7,185 bytes)
76. Re: [Amps] Guidelines.....toroids for tank ckts (score: 145): Author: "Ulf (SM0NOR)" <ulf@sm0nor.com>; Date: Wed, 28 Mar 2012 17:31:20 +0200; "design a toroidal tank circuit for your vacuum tube amplifier" It's in Ham Radio Magazine August 1985. Perhaps the information is old and outdated - I'm no expert. But I found it useful when I built; /archives//html/Amps/2012-03/msg00299.html (9,624 bytes)
77. [Amps] Guidelines/ideas/references for using toroids in HF tube amp tank circuit? (score: 145): Author: David Feldman <wb0gaz@yahoo.com>; Date: Sat, 24 Mar 2012 08:03:34 -0700 (PDT); I'm looking at alternatives to rebuild a tank circuit in a 1.5kw HF amp. I'm interested in using toroids rather than air-core coils and with that, a different (non-tapped, separate coil for each band; /archives//html/Amps/2012-03/msg00256.html (7,133 bytes)
78. Re: [Amps] Wanted (score: 137): Author: gudguyham via Amps <amps@contesting.com>; Date: Wed, 24 Mar 2021 09:47:10 +0000 (UTC); Yes my friend is selling an AL1500. Send me an email and Ill get you with him. Sent from the all new AOL app for iOS Does anyone on the list have a good used AL-82, 1200 or 1500 amp they are Willing; /archives//html/Amps/2021-03/msg00039.html (15,909 bytes)
79. Re: [Amps] Wanted (score: 137): Author: Douglas L via Amps <amps@contesting.com>; Date: Tue, 23 Mar 2021 23:28:02 -0400; If you dont mind an oldie but goody, I recommend the National NCL2000. Ive got two of them and consider them among the best amps ever made. They easily put out about 1300 watts on a 240v line. The po; /archives//html/Amps/2021-03/msg00037.html (19,462 bytes)
80. Re: [Amps] Wanted (score: 137): Author: Paul Baldock <paul@paulbaldock.com>; Date: Wed, 24 Mar 2021 02:55:48 +0000; How about an Alpha 87A $2400 ________________________________ From: Amps <amps-bounces@contesting.com> on behalf of Ron Ellis <KH6DV@hawaiiantel.net> Sent: Tuesday, March 23, 2021 6:21:14 PM To: amps; /archives//html/Amps/2021-03/msg00036.html (15,479 bytes)

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