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Total 15 documents matching your query.

1. [Amps] AL-1500 pi-network capabilities (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Mon, 30 Aug 2004 06:16:23 -0400; I've been toying with the idea of adding a modern amp to my SB-220 for SO2R operation. One of the things I really like about the SB-220 is that its pi network has sufficient matching range on the low; /archives//html/Amps/2004-08/msg00449.html (6,848 bytes)
2. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 30 Aug 2004 08:01:22 -0700; On Aug 30, 2004, at 3:16 AM, Pete Smith wrote: I've been toying with the idea of adding a modern amp to my SB-220 for SO2R operation. One of the things I really like about the SB-220 is that its pi n; /archives//html/Amps/2004-08/msg00451.html (9,070 bytes)
3. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Mon, 30 Aug 2004 08:29:32 -0700; R.Measures wrote: On Aug 30, 2004, at 3:16 AM, Pete Smith wrote: One of the things I really like about the SB-220 is that its pi network has sufficient matching range on the low bands so that, for ex; /archives//html/Amps/2004-08/msg00452.html (8,318 bytes)
4. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Mon, 30 Aug 2004 09:03:53 -0700; mike kendall wrote: I thought Ameritron was using PI-L networks vice PI networks? If that is the case, doesn't a PI-L network have a more limited matching range than a PI, but much better harmonic su; /archives//html/Amps/2004-08/msg00453.html (8,266 bytes)
5. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: "Phil Clements" <philk5pc@tyler.net>; Date: Mon, 30 Aug 2004 11:31:23 -0500; high, and You are far too kind, Vic! IMO, the tank circuit in the SB-220 is as robust as the AL-1500, and the 220 will not do near 2400 watts out. I remember amp projects in the '60's and '70's that; /archives//html/Amps/2004-08/msg00455.html (8,348 bytes)
6. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 30 Aug 2004 12:18:29 -0700; On Aug 30, 2004, at 9:03 AM, Vic Rosenthal wrote: mike kendall wrote: I thought Ameritron was using PI-L networks vice PI networks? If that is the case, doesn't a PI-L network have a more limited mat; /archives//html/Amps/2004-08/msg00458.html (9,121 bytes)
7. [Amps] AL-1500 pi-network capabilities (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 30 Aug 2004 23:18:03 -0400; If the tank coil(s) are under-sized, this will in turn effect the Q due to the skin effect raising the resistance of the conductor, especially in the higher frequencies. You are exactly correct on th; /archives//html/Amps/2004-08/msg00465.html (9,334 bytes)
8. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Tue, 31 Aug 2004 08:31:06 +0100; Will Matney wrote: Another good coil can be made by using a wide copper strip about 5/8" wide and about 1/16" thick. Plating, etc. helps this too, and this can be a good substitute for using tubing.; /archives//html/Amps/2004-08/msg00474.html (8,788 bytes)
9. [Amps] AL-1500 pi-network capabilities (score: 1): Author: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>; Date: Wed, 01 Sep 2004 20:59:51 +0000; Hi Will, thanks very much for these observations. I apologize for not giving more information. I naively thought the photos would be enough. interesting what you said about the low frequency coil, as; /archives//html/Amps/2004-09/msg00023.html (11,741 bytes)
10. [Amps] AL-1500 pi-network capabilities (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 01 Sep 2004 19:34:21 -0400; Rob. Aluminum has several design features that aren't as good as copper for a tank coil. Copper has better conducting values and will not get hot near as quick. Plus, soldering to aluminum isn't as e; /archives//html/Amps/2004-09/msg00030.html (10,270 bytes)
11. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 1 Sep 2004 18:00:58 -0700; On Sep 1, 2004, at 1:59 PM, Rob Atkinson, K5UJ wrote: Hi Will, thanks very much for these observations. I apologize for not giving more information. I naively thought the photos would be enough. inte; /archives//html/Amps/2004-09/msg00032.html (8,434 bytes)
12. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>; Date: Thu, 02 Sep 2004 13:53:05 +0000; Thanks Rich; it is a shame the 922 isn't being made anymore. Thanks Will for pointing out the obvious about aluminum. If I had thought about it more I would have realized the soldering difficulties a; /archives//html/Amps/2004-09/msg00042.html (9,452 bytes)
13. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: R.Measures <r@somis.org>; Date: Thu, 2 Sep 2004 08:02:14 -0700; On Sep 2, 2004, at 6:53 AM, Rob Atkinson, K5UJ wrote: Thanks Rich; it is a shame the 922 isn't being made anymore. Rob -- If it were updated and some circuit improvements made, the TL-922 would be a; /archives//html/Amps/2004-09/msg00045.html (8,337 bytes)
14. Re: [Amps] AL-1500 pi-network capabilities (score: 1): Author: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>; Date: Thu, 02 Sep 2004 21:35:09 +0000; Yes several 922s are for sale on ebay and qth.com. I read your interesting and entertaining comments on your website re the 922. there is useful information there not only for 922 owners but any 3-50; /archives//html/Amps/2004-09/msg00055.html (9,024 bytes)
15. [Amps] AL-1500 pi-network capabilities (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Fri, 03 Sep 2004 00:53:15 -0400; Rob, I almost didn't catch your question below about the low frequency coil in tank circuits. Yes, the type of core used on the coil can cause a coil to heat up. Preferably, this should be a true air; /archives//html/Amps/2004-09/msg00056.html (10,097 bytes)

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