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Total 34 documents matching your query.

21. Re: [Amps] LDMOS availability (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 7 Jun 2017 22:12:50 -0700; Yes. 20 years is young for a well designed tube amp; my Titans left the factory at least 35 years ago, and except for one with a fried power xfmr, are working great. The Alpha 87As new to my shack we; /archives//html/Amps/2017-06/msg00117.html (9,819 bytes)
22. Re: [Amps] LDMOS availability (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Thu, 8 Jun 2017 21:25:27 -0400; Yes, but we are talking reality. How many 2-meter amps designed for FM are linear? Class C can be linear, but how many ham amps running class C are linear? On that note, how many commercial ham amps; /archives//html/Amps/2017-06/msg00122.html (9,587 bytes)
23. Re: [Amps] LDMOS availability (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Fri, 9 Jun 2017 16:36:37 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Please explain how a Class C amp can be linear. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http; /archives//html/Amps/2017-06/msg00125.html (8,399 bytes)
24. Re: [Amps] LDMOS availability (score: 1): Author: "Mark Bitterlich" <markbitterlich@embarqmail.com>; Date: Fri, 9 Jun 2017 20:56:33 -0400; That has already been explained by Manfred. You may disagree, but that does not make his explanation incorrect. If the device conducts less than 180 degrees, then it is Class C. Bias modulation does; /archives//html/Amps/2017-06/msg00128.html (10,651 bytes)
25. Re: [Amps] LDMOS availability (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Sat, 10 Jun 2017 02:59:08 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Nonsense. If the amp conducts less than 180 degrees it can not possibly be linear because the output in NOT a replica of the input. That's the definition; /archives//html/Amps/2017-06/msg00129.html (9,135 bytes)
26. Re: [Amps] LDMOS availability (score: 1): Author: Jim Garland <4cx250b@miamioh.edu>; Date: Fri, 9 Jun 2017 22:02:53 -0600; There are two issues, here, one being the definition of Class C, and the other being linearity. I'm inclined to agree with Bill on both. It's not hard to imagine modulating the bias, so that on voice; /archives//html/Amps/2017-06/msg00130.html (10,669 bytes)
27. [Amps] LDMOS availability (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 9 Jun 2017 22:48:44 -0700; <There are two issues, here, one being the definition of Class C, and the <other being linearity. I'm inclined to agree with Bill on both. It's not hard to imagine modulating the bias, so that on voi; /archives//html/Amps/2017-06/msg00131.html (11,533 bytes)
28. Re: [Amps] LDMOS availability (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Sat, 10 Jun 2017 05:51:41 -0400; Like Bill and Jim(s) I disagree. You really aren't running class C all the time. You are varying the bias from class to change from class C to AB 1 or 2 either continuously or in steps. I question th; /archives//html/Amps/2017-06/msg00132.html (13,282 bytes)
29. Re: [Amps] LDMOS availability (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Sat, 10 Jun 2017 07:54:03 -0400; /* snip */ out in QST, its function was to cut off idle current between dots and dashes for qsk cw. /* snip */ I did this in 1973, I had to because of the electron noise from the two 6146s in my Heat; /archives//html/Amps/2017-06/msg00133.html (9,054 bytes)
30. Re: [Amps] LDMOS availability (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sat, 10 Jun 2017 11:44:01 -0400; <There are two issues, here, one being the definition of Class C, and the <other being linearity. I'm inclined to agree with Bill on both. It's not hard to imagine modulating the bias, so that on voi; /archives//html/Amps/2017-06/msg00135.html (13,269 bytes)
31. Re: [Amps] LDMOS availability (score: 1): Author: "Mark Bitterlich" <markbitterlich@embarqmail.com>; Date: Sat, 10 Jun 2017 11:57:18 -0400; The first thing that must be agreed is that if the device conducts less than 180 degrees then it is Class C. I submit that this is not nonsense, it is the agreed upon definition of what determines a; /archives//html/Amps/2017-06/msg00136.html (12,552 bytes)
32. Re: [Amps] LDMOS availability (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Sat, 10 Jun 2017 17:49:28 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Exactly. I would call that a Variable Class Amplifier. To just simply call it Class C is incorrect. 73, Bill W6WRT ______________________________________; /archives//html/Amps/2017-06/msg00137.html (8,418 bytes)
33. Re: [Amps] LDMOS availability (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Sat, 10 Jun 2017 18:03:56 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Incorrect. Because it is biased beyond cutoff, a Class C amp does not amplify the entire drive signal and therefore can not be considered "linear". For e; /archives//html/Amps/2017-06/msg00138.html (10,398 bytes)
34. [Amps] LDMOS availability (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Sat, 10 Jun 2017 20:51:59 -0700; <Like Bill and Jim(s) I disagree. You really aren't running class C all <the time. You are varying the bias from class to change from class C to AB 1 or 2 either continuously or in steps. I question; /archives//html/Amps/2017-06/msg00143.html (11,249 bytes)

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