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361. 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)

362. 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)

363. 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)

364. Re: [Amps] Ten-Tec Titan 10 Meter Input SWR (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 11 Jun 2017 03:50:28 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: The length of coax does not affect SWR unless it is extremely long, where line loss comes into play. Even then, the effect is to reduce SWR, not increase
/archives//html/Amps/2017-06/msg00142.html (7,184 bytes)

365. Re: [Amps] Ten-Tec Titan 10 Meter Input SWR (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 11 Jun 2017 16:45:00 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Not quite. It's the radio between the antenna's impedance and the coax impedance. That ratio is fixed regardless of the coax length, except as I said, fo
/archives//html/Amps/2017-06/msg00158.html (9,312 bytes)

366. Re: [Amps] Ten-Tec Titan 10 Meter Input SWR (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 11 Jun 2017 16:48:10 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: SWR is not measured in ohms. It is a ratio between two ohmic values. 73, Bill W6WRT _______________________________________________ Amps mailing list Amp
/archives//html/Amps/2017-06/msg00159.html (9,123 bytes)

367. Re: [Amps] Ten-Tec Titan 10 Meter Input SWR (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 11 Jun 2017 16:53:44 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: My understanding is that's a false reading caused by current flowing on the outside of the coax braid. The true SWR does not change. 73, Bill W6WRT _____
/archives//html/Amps/2017-06/msg00160.html (8,344 bytes)

368. Re: [Amps] Ten-Tec Titan 10 Meter Input SWR (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Sun, 11 Jun 2017 17:02:20 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: I say you're right. The only difference between the two scenarios above is the one with 2:1 SWR has some additional line loss, but as you might suspect,
/archives//html/Amps/2017-06/msg00162.html (10,059 bytes)

369. Re: [Amps] Ferrite Core for 160M PI Output (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Thu, 15 Jun 2017 21:11:16 +0000
Going back to the original question about ferrite for a Pi network tank: I had always heard that powdered iron was better in a resonant MF or HF circuit because of better Q, so I am wondering why the
/archives//html/Amps/2017-06/msg00210.html (7,651 bytes)

370. Re: [Amps] Solid State Amps-v- Tube Amps (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Mon, 19 Jun 2017 03:31:19 +0000
There is one thing about tube amps that is not often mentioned and that is the multiple functions of the pi- or pi-L network, something that is not applicable to solid state amps. In one simple circu
/archives//html/Amps/2017-06/msg00227.html (7,767 bytes)

371. Re: [Amps] About LP100A (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Mon, 19 Jun 2017 07:29:35 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: You might consider getting a digital oscilloscope. There are several in the 500 price range that will display what you want but their big advantage is be
/archives//html/Amps/2017-06/msg00230.html (7,594 bytes)

372. Re: [Amps] About LP100A (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Tue, 20 Jun 2017 01:42:10 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Are you saying the traditional analog scopes are better? As a technician who used to work at Tektronix, I can assure you that digital scopes can do every
/archives//html/Amps/2017-06/msg00239.html (8,765 bytes)

373. Re: [Amps] About LP100A (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Tue, 20 Jun 2017 22:44:08 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: You might have me there, although with the built in measurement capabilities, Lissajous figures are no longer needed. I haven't used them in more than 50
/archives//html/Amps/2017-06/msg00248.html (8,500 bytes)

374. Re: [Amps] About LP100A (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Tue, 20 Jun 2017 22:52:17 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: My relatively inexpensive Rigol scope automatically adjusts to the input signal, both vertically and horizontally, something an analog scope can not do a
/archives//html/Amps/2017-06/msg00249.html (8,620 bytes)

375. Re: [Amps] About LP100A (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Tue, 20 Jun 2017 23:07:58 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: As I recall. Lissajous figures only make sense if the two frequencies have an integer relationship such as 2:1, 3:1, etc, otherwise all you see is a jumb
/archives//html/Amps/2017-06/msg00251.html (8,729 bytes)

376. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Fri, 7 Jul 2017 01:07:36 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: No, a light bulb is NOT perfect and I'll tell you why. The cold resistance of a light bulb is much lower than when it is hot. Thus the 100 watt light bul
/archives//html/Amps/2017-07/msg00022.html (9,098 bytes)

377. Re: [Amps] SB220 step start blows fuses (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Fri, 7 Jul 2017 16:34:09 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: At the very low end of its range, a Variac limits current just fine. I worked as a calibration technician at Tektronix for years, taking brand new scopes
/archives//html/Amps/2017-07/msg00025.html (8,894 bytes)

378. Re: [Amps] Machlett 3-500z (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Mon, 24 Jul 2017 23:18:00 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: Beware of old 3-500's. They are notorious for becoming gassy while sitting on the shelf. Either get a guarantee or be prepared to getter them yourself. 7
/archives//html/Amps/2017-07/msg00098.html (8,298 bytes)

379. Re: [Amps] Machlett 3-500z (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Tue, 25 Jul 2017 05:27:14 +0000
-- ORIGINAL MESSAGE --(may be snipped) REPLY: If possible, try to buy ones with welded filament pins. The ones that are soldered have a way of coming unsoldered after a while. 73, Bill W6WRT ________
/archives//html/Amps/2017-07/msg00101.html (8,952 bytes)

380. Re: [Amps] ratings for caps for filters, for SSPA (score: 1)
Author: Bill Turner <dezrat@outlook.com>
Date: Thu, 24 Aug 2017 14:10:45 +0000
A good web site for tracking down parts is http://www.findchips.com/ It has "chips" in the title, but it will find almost anything electronic. 73, Bill W6WRT _________________________________________
/archives//html/Amps/2017-08/msg00047.html (7,076 bytes)

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