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1. [Amps] Amplifier 2x3-500Z (score: 1): Author: "Gino" <gino@camporese.net>; Date: Fri, 26 Mar 2010 11:45:16 +0100; I need some information for amp 2 x 3-500z input circuit. I see many circuit but National XR-50 in no available. can you help me? many thanks IK3HZI Gino _____________________________________________; /archives//html/Amps/2010-03/msg00654.html (6,796 bytes)
2. Re: [Amps] Amplifier 2x3-500Z (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Fri, 26 Mar 2010 10:52:44 -0700; ORIGINAL MESSAGE: REPLY: A pair of 3-500Zs has an input impedance of very close to 50 ohms and is an ideal candidate for the simplest of all resonant input circuits - a parallel resonant coil and cap; /archives//html/Amps/2010-03/msg00659.html (7,848 bytes)
3. Re: [Amps] Amplifier 2x3-500Z (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 26 Mar 2010 14:13:29 -0400; Toroids and mica compression trimmers are the way to go in 2010. Mount them on a board with relay control and put them where they can be safely tuned. Carl KM1H ______________________________________; /archives//html/Amps/2010-03/msg00664.html (7,888 bytes)
4. Re: [Amps] Amplifier 2x3-500Z (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Fri, 26 Mar 2010 14:16:03 -0400; Go here and look. If you don't want to do the board look at the "manual" and it will give you the values of capacitors and number of turns for toroids. This works very well. http://home.earthlink.net; /archives//html/Amps/2010-03/msg00665.html (8,450 bytes)

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