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21. Stub QTHs (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Thu Mar 28 19:37:10 1996; Oops, I made a boo boo! I said a shorted stub, and I meant to say an open stub! The criteria I gave was correct for a typical pi-type PA and THIRD harmonic stubs, with the exception of my calling it; /archives//html/CQ-Contest/1996-03/msg00159.html (8,592 bytes)
22. More Power (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Fri Mar 29 10:13:38 1996; While what you say would be true IF S meters used a six dB per S unit standard, they don't. That "standard" is not now, and never was a standard. It was something one manufacturer tried to use after; /archives//html/CQ-Contest/1996-03/msg00165.html (9,497 bytes)
23. More Power, the real rule (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sat Mar 30 16:19:44 1996; 97.313a "An amateur station must use the minimum transmitter power necessary to carry out the desired communications." Within the FCC's jurisdiction, if you've EVER used more power than necessary to; /archives//html/CQ-Contest/1996-03/msg00169.html (8,514 bytes)
24. More Power, the real rule (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun Mar 31 11:35:13 1996; Hi Ed, You sound perfect! Great going Ed! I never realized people that don't always reduce power have reasoning abilities below the level of third graders! Thanks for the additional insight! I will i; /archives//html/CQ-Contest/1996-03/msg00174.html (7,221 bytes)
25. Stub QTHs (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun Mar 31 11:35:58 1996; Like anyone would be interested, but I reviewed the data again. Optimum attenuation occurs when cascaded stubs are place 1/4 wl apart (or odd multiples thereof) *at the REJECT frequency*. Optimum SWR; /archives//html/CQ-Contest/1996-03/msg00175.html (30,935 bytes)
26. S Units (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Mon Apr 1 19:00:08 1996; Hi Bill, That's a common misconception Bill. Beg all you want, one dB of voltage change is 1 dB of power change, look at the formulas! A 3 dB pad provides a 3 dB voltage, current and power loss. S me; /archives//html/CQ-Contest/1996-04/msg00008.html (17,265 bytes)
27. CW will go next (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue Apr 2 17:30:15 1996; probably lawless Might as well not hold your breath Jim. Technical testing has already been downgraded, along with the code. It's part of the entitlement program and the cost of downsizing the FCC. I; /archives//html/CQ-Contest/1996-04/msg00016.html (6,791 bytes)
28. S Units (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue Apr 2 17:30:36 1996; Hi All, I received about ten E-mails saying 3 dB of voltage change is twice the voltage, but that is absolutely incorrect. If the posters would just lok in the ARRL Handbooh they will see that what I; /archives//html/CQ-Contest/1996-04/msg00017.html (10,457 bytes)
29. 4-1000 Info Please? (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Thu Apr 4 10:27:10 1996; It depends on how hard you want to push the tube. Thoriated tungsen filament tubes can take a fair amount of abuse, and in amateur service you'll likely never notice the shortening of life unless the; /archives//html/CQ-Contest/1996-04/msg00031.html (13,631 bytes)
30. Tetrode QRO (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Fri Apr 5 09:30:05 1996; The grid driven amp was abandoned in amateur service due to drive power, stability, complexity and cost reasons, in spite of what manufacturers and salesmen of tetrodes would have us believe! Amplifi; /archives//html/CQ-Contest/1996-04/msg00041.html (46,601 bytes)
31. 4-1000 Info Please? (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Fri Apr 5 13:28:10 1996; Great point John! Most people don't understand that, and think SWR is the only issue. The problem is, as you said, rooted in the long path for the higher order harmonics. That can cause "rounding" of; /archives//html/CQ-Contest/1996-04/msg00042.html (20,993 bytes)
32. 4-1000 Info Please? (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sat Apr 6 23:21:26 1996; I've never been able to duplicate the result the results claimed in those articles. To the contrary, I've found (and other engineers have confirmed) IMD increased and stability decreased by following; /archives//html/CQ-Contest/1996-04/msg00057.html (22,230 bytes)
33. Tetrode QRO (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Sun Apr 7 21:26:39 1996; either)! control That initial mistake was the result of following the data in the Super Cathode Driven circuit articles. What you say is true Mario. Just like you did Mario, if you remove the silver; /archives//html/CQ-Contest/1996-04/msg00059.html (7,914 bytes)
34. SB-220 stabilization (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Mon Apr 8 11:05:20 1996; << Th Parasitic Suppressor Kit for the SB-220 put out by Harbach Electronics (407-723-7145), replaces the 1mh grid chokes with 27ohm 1/2w carbon film resistors and adds 820pf ceramic bypass caps (in; /archives//html/CQ-Contest/1996-04/msg00064.html (32,828 bytes)
35. Contest Keyer Memory Question (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Mon Apr 8 18:17:34 1996; It's been a while since I operated any contests, and when I did I only operated 160 CW tests. So I have some questions. I want to buy a new keyer. What's the best contest type keyer and why? What's t; /archives//html/CQ-Contest/1996-04/msg00066.html (22,287 bytes)
36. SB220 Arcing (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue Apr 9 00:45:35 1996; Subj: Re: 220 arcing Everyone now tends to connect arcing with parasitics. Although under rare conditions that can occur, it's a very rare case. The reason you still have this problem after installin; /archives//html/CQ-Contest/1996-04/msg00070.html (10,031 bytes)
37. Why QRO arcs? (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue Apr 9 12:12:18 1996; That is true only for a properly loaded tank, or class A amplifier Mario. The design parameters are definable, but complex, for peak voltage in an unloaded tank in an amplifier with less than 360 deg; /archives//html/CQ-Contest/1996-04/msg00074.html (41,504 bytes)
38. SB-220 tube arcs (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Tue Apr 9 22:29:58 1996; My hard drive crashed and ate the last week of stuff that wasn't backed up. Whoever it was that E-mailed me about parasitics causing tubes to arc over, can you send again? 73 Tom Bruce - I have found; /archives//html/CQ-Contest/1996-04/msg00078.html (14,407 bytes)
39. Quieting amplifiers (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Wed Apr 10 14:44:25 1996; Dick's advice is VERY good, especially with the large stuff he works with. With air velocities used by tiny little tubes like 1200's, air is pretty "fluid". I have full air flow measuring capability; /archives//html/CQ-Contest/1996-04/msg00085.html (9,423 bytes)
40. Ladder line impedance. (score: 1): Author: W8JITom@aol.com (W8JITom@aol.com); Date: Wed Apr 10 15:41:48 1996; I just ordered some "450" ohm ladder line. The measured impedance is ~371 ohms. I'll contact the vendor, but beware of special non-numbered, mil, or commercial feedlines. At times they aren't what th; /archives//html/CQ-Contest/1996-04/msg00086.html (59,373 bytes)

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