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References: [ +from:bob.sutton@xtra.co.nz: 12 ]

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1. [AMPS] L4B (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Sat, 17 Oct 1998 14:43:30 +1300; SNIP Does your Icom 970 electrically switch in a preamp/special rx front end over this range? I suppose 143.8-148.2 in the IF My IC-275H displays a very similar effect when I use a GaAs FET masthead; /archives//html/Amps/1998-10/msg00225.html (8,228 bytes)
2. [AMPS] Measuring plate choke series resonance (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Thu, 29 Oct 1998 14:04:45 +1300; Greetings ... What is the usual method of measuring the series resonance of a plate choke? Probably a silly question, but could there be more than one series resonant frequency? There is not much pow; /archives//html/Amps/1998-10/msg00442.html (8,310 bytes)
3. [AMPS] How to build the ultimate HF amplifier ? (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Sat, 31 Oct 1998 10:33:32 +1300; for each Hello John, Einar, and group, This method is used in the "Aerocom" 6 channel 1kW SSB/CW HF transmitter. The exciter drove the 4CX1500B tetrode with 3 watts in a passive grid circuit with bro; /archives//html/Amps/1998-10/msg00506.html (8,984 bytes)
4. [AMPS] 4-1000A amp design (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Tue, 11 Aug 1998 09:09:07 +1200; I've "been there" with the aluminium sockets and cured the instability (in my case a VHF ocillation) with a VHF series tuned circuit from one of the cathode/filament pins to chassis (or from a cathod; /archives//html/Amps/1998-08/msg00084.html (12,028 bytes)
5. [AMPS] 4-1000A amp design (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Tue, 11 Aug 1998 09:47:27 +1200; For those who haven't seen it, there is a collection of e-mail(?) comments about experiences with 4-1000 tubes and amplifiers (and other tubes/amps), including tips to stabilise the 4-1000A at ... ht; /archives//html/Amps/1998-08/msg00087.html (8,081 bytes)
6. [AMPS] 4-1000A (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Tue, 11 Aug 1998 12:50:56 +1200; I see in the Eimac Technical Data for the 4-1000A that this tube is rated for DC plate voltage of 5.5kV (below 30MHz) in plate modulated AM service with a Plate Output Power of 2630W. training (when; /archives//html/Amps/1998-08/msg00090.html (7,285 bytes)
7. [AMPS] 4-1000A amp design (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Tue, 11 Aug 1998 12:50:49 +1200; Cathode driven. I tried it as a grid driven pair of 4-1000's but gave up in frustration ... all those power supplies and mediocre results! I know others who have succeeded with grid driven, but the c; /archives//html/Amps/1998-08/msg00091.html (9,188 bytes)
8. [AMPS] Re: SSB Power Output (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Wed, 22 Jul 1998 12:09:39 +1200; SNIP. In the mid '80s I had the opportunity to view the spectral output on 3 different brands of ham transcivers with an HP spectrum analyser as the power level was increased over the manufacturers s; /archives//html/Amps/1998-07/msg00123.html (8,973 bytes)
9. [AMPS] Pencils and fiery inch-long arcs! (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Wed, 22 Jul 1998 12:09:34 +1200; Good grief!!! "DON'T TRY THIS AT HOME" is right!!! I know you are referring to RF voltages, but the cap of an 813 also has the HT voltage of course. Many years ago a ZL ham died when he used a pencil; /archives//html/Amps/1998-07/msg00124.html (9,866 bytes)
10. [AMPS] Re: SSB Power Output (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Thu, 23 Jul 1998 11:47:00 +1200; to stand out over the "rabble" ... but the audio response/quality and operator technique play VERY significant parts too. I often hear W8AH first although his signal is 3-6dB down on the rest of the; /archives//html/Amps/1998-07/msg00149.html (9,701 bytes)
11. [AMPS] Re: SSB Power Output (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Thu, 23 Jul 1998 12:04:27 +1200; SNIP Very well put. It's unfortunate some can't put up a real antenna due to zoning rules. SNIP You are a patient man Jon Ogden! Seriously, once the 50 or so big-guns in the pile-up are out of the wa; /archives//html/Amps/1998-07/msg00150.html (9,521 bytes)
12. [AMPS] ZL8RS (score: 1): Author: bob.sutton@xtra.co.nz (Bob Sutton); Date: Fri, 24 Jul 1998 02:46:13 +1200; Hi all ... I have pictures of my ZL8RS operation on line now, including the little amplifier I built for the trip. You can get there via a link from my updated ZL1RS web site. http://www.qsl.net/zl1r; /archives//html/Amps/1998-07/msg00172.html (6,657 bytes)

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