- 61. Re: [Amps] Chinese DIN connectors (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Fri, 11 Dec 2009 04:37:57 -0600
- Peter, I appreciate your thinking. However, some guys don't want (or cant) to spend $10 on a connector. To my thinking - there is no such thing as a good or bad connector - there is just a suitabilit
- /archives//html/Amps/2009-12/msg00296.html (11,932 bytes)
- 62. Re: [Amps] WTB: SB-220 or AL-811H (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Thu, 17 Dec 2009 22:00:38 -0600
- I'm with Mike. Seems to me that perfect working order and that price range with the power output specs (especially the 1500w) just don't go together unless a guy gets a good friend of the family type
- /archives//html/Amps/2009-12/msg00413.html (12,011 bytes)
- 63. Re: [Amps] Question about GS-35b efficiency (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Fri, 18 Dec 2009 19:46:12 -0600
- Jim, I saw one of those amps at Dayton. You will need 3 strong men and 2 boys to carry it. Not sure about the control board part count - agree 1K parts seems quite a few - but the overall build quali
- /archives//html/Amps/2009-12/msg00468.html (11,521 bytes)
- 64. Re: [Amps] Question about GS-35b efficiency (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Fri, 18 Dec 2009 23:40:49 -0600
- Yes, K0RU (a psycho high-speed CW op) and I were standing there looking at it. I'd not seen a contempary Alpha and wanted to see "how the big boys do it." While we were standing there, wondering why
- /archives//html/Amps/2009-12/msg00479.html (10,615 bytes)
- 65. Re: [Amps] Re GS-35B hours.. (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Sun, 20 Dec 2009 23:00:42 -0600
- I think in the Eimac white paper covering the reduced filament voltage, they talk about the benefit being applicable to tubes with a certain ratio of filament power to output power. Forget what that
- /archives//html/Amps/2009-12/msg00519.html (9,331 bytes)
- 66. [Amps] Wanted: About 12 150-250 pf 5KV+ doorknob caps (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 5 Jan 2010 21:57:33 -0600
- If you have a stack of these that you would like to part with, please contact me off list. After this last weekend's RTTY RU, I find myself needing to build some nuclear blast proof antenna traps tha
- /archives//html/Amps/2010-01/msg00026.html (6,691 bytes)
- 67. Re: [Amps] L section of Pi-L filter (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Wed, 6 Jan 2010 14:14:25 -0600
- To add to the recommendations, Pi-L is excellent. On the toroid, 3 words of caution: 1. The power dissipation comments below are exactly right. The toroid will heat up. And you want to keep the heat
- /archives//html/Amps/2010-01/msg00034.html (12,549 bytes)
- 68. Re: [Amps] WTB: 800 watt-1KW amp (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 12 Jan 2010 00:20:18 -0600
- Be careful with the 811 - that tube needs a lot of light duty TLC. If RTTY or PSK is part of the plan, that is the wrong amp. And with CW, you still need to treat those tubes gently. SB200 with 872b
- /archives//html/Amps/2010-01/msg00092.html (14,285 bytes)
- 69. Re: [Amps] Used tubes (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Wed, 13 Jan 2010 13:09:26 -0600
- Mike, I don't think the socket insertion marks are conclusive. Suggestive but not reliably conclusive. To my thinking, a high tension socket will leave the marks and if the mfg or some interim party
- /archives//html/Amps/2010-01/msg00150.html (12,136 bytes)
- 70. Re: [Amps] Good amp to buy maybe build.. (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Sat, 30 Jan 2010 00:38:53 -0600
- I second what Bill is saying here. If you build, consider the cost an education expense. And then you can rationalize a huge amount of money being spent. You have the pride of crafting something yous
- /archives//html/Amps/2010-01/msg00479.html (10,329 bytes)
- 71. Re: [Amps] HB amps - what you can build with no tools (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Mon, 1 Feb 2010 23:02:59 -0600
- My amp building elmer told me once... A hole that you cannot see is a perfectly drilled hole. And a jagged hole with trim covering the jagged hole is also a perfectly formed hole. A guy can cover up
- /archives//html/Amps/2010-02/msg00060.html (10,323 bytes)
- 72. Re: [Amps] HB amps - what you can build with no tools (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 2 Feb 2010 00:30:31 -0600
- Gary, I didn't mean to disrespect fine craftsmanship. If I have the time, money and patience - that's the road I would take. Rather here I wanted to give an alternative to guys who may be thinking "I
- /archives//html/Amps/2010-02/msg00066.html (12,718 bytes)
- 73. Re: [Amps] HB amps - what you can build with no tools (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 2 Feb 2010 01:32:52 -0600
- Gary, In stressing over the "how much debur is enough debur" kind of thing (fill in the blank with whatever mechanical challenge you had on a given build) I got to thinking - rather than focusing on
- /archives//html/Amps/2010-02/msg00071.html (15,794 bytes)
- 74. Re: [Amps] QRO Questions (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Fri, 5 Feb 2010 14:50:46 -0600
- Come on Jim, it's not Pd that's the problem, it cable loss. A guy may want to share the same coax with HF and also his 5.8G link. Hence the need for coax the size of your forearm. Cut down on that un
- /archives//html/Amps/2010-02/msg00129.html (12,643 bytes)
- 75. Re: [Amps] Re GI-7B Triodes.. (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Wed, 3 Mar 2010 11:45:16 -0600
- Bob, The tube temps can be measured reasonably well with an IR thermometer. Hot spots too look for are on the center of the ceramic body and the junction with the anode. The datasheet lists max temps
- /archives//html/Amps/2010-03/msg00067.html (9,397 bytes)
- 76. Re: [Amps] GI7B Question - Input Matching (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Sun, 14 Mar 2010 20:34:56 -0500
- Lee, A **SINGLE** tube may run up to 100 ohms. A pair will be 50 ohms or less. Depends on a lot of things though. A broadband match will hurt the amp's efficiency vs. a L/C style matched input with a
- /archives//html/Amps/2010-03/msg00268.html (8,901 bytes)
- 77. Re: [Amps] Clipperton-L parasitic suppressors (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Sun, 14 Mar 2010 22:37:25 -0500
- The H&H book is, in my opinion, the best single compendium of electronics to ever have been written. That book and one of Orr's RFHB would give an otherwise novice engineer a petty good handle on the
- /archives//html/Amps/2010-03/msg00270.html (12,051 bytes)
- 78. Re: [Amps] OT the 50 cent-ers (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Tue, 16 Mar 2010 03:31:34 -0500
- Charlie, Not sure what's this have to do with amps, but it's an interesting subject. I lived in China for about 6 years from 1999 onward and have been traveling there on business for, I guess 20 some
- /archives//html/Amps/2010-03/msg00295.html (9,035 bytes)
- 79. Re: [Amps] Good engineering (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Wed, 24 Mar 2010 03:01:47 -0500
- Bill, I agree with you on the balance. Got graded down in college for setting the current through a voltage divider net too high. My logic, it would be less susceptible to noise and other influences.
- /archives//html/Amps/2010-03/msg00537.html (11,705 bytes)
- 80. Re: [Amps] Good engineering (score: 1)
- Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>
- Date: Mon, 29 Mar 2010 03:26:20 -0500
- If you say "Kirkendall voiding," be sure to send flowers in the morning. :) 73/jeff/ac0c _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.
- /archives//html/Amps/2010-03/msg00744.html (9,234 bytes)
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