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1. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Fri, 12 Apr 2002 07:20:20 -0700; A few weeks ago I increased the supply potential to 16VDC because the 440 is rated at 12V to 16V. Some expressed doubt that 16V was safe. The radio still works and it is still producing less IMD. How; /archives//html/Amps/2002-04/msg00318.html (7,480 bytes)
2. [Amps] TS-440S Update (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 15 Apr 2002 07:41:17 +0100; Did anyone say otherwise? Trouble is Rich, the idea of having a cleaner signal is fine, but one is a bit of a lone voice compared with the 'wind it full clockwise' brigade. Still, we have the satisfa; /archives//html/Amps/2002-04/msg00352.html (7,613 bytes)
3. [Amps] TS-440S Update (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Mon, 15 Apr 2002 10:24:17 +0000; I reckon ALC meters are often too sluggish. TS830, for example: often commented that it's cleaner with the processor on - actually, it's not, but without clipping the ALC meter doesn't register short; /archives//html/Amps/2002-04/msg00353.html (8,145 bytes)
4. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 04:02:53 -0700; ? I speak of what is often done on the air, Peter. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2002-04/msg00354.html (7,942 bytes)
5. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 04:23:45 -0700; Indeed. The surprisingly unique things about the TS-830S are that: it is exceedingly difficult to make dirty and the processor substantially improves copyability under weak signal conditions. Howeve; /archives//html/Amps/2002-04/msg00355.html (8,814 bytes)
6. [Amps] TS-440S Update (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 15 Apr 2002 12:47:30 +0100; There are times when one has to wonder about technological 'progress' - or maybe I'm a bit too cynical. Some 'miracle' cures for every ill, such as ALC for example, do leave me a bit dubious. 73 Pete; /archives//html/Amps/2002-04/msg00356.html (8,072 bytes)
7. [Amps] TS-440S Update (score: 1): Author: k7fm@teleport.com (COLIN LAMB); Date: Mon, 15 Apr 2002 5:53:19 -0700; We speak of ALC causing the problem - but ALC simply allows the problem to occur. The real problem is "flat-topping" during the instant of the first pulse - prior to ALC shutting down the amplifier; /archives//html/Amps/2002-04/msg00357.html (9,255 bytes)
8. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 06:53:35 -0700; ? I spoke with a Cal Berkeley graduate about making solid-state output radios as clean as the 830. He said it would be easy: Simply add a low-ohm chip-R in the emitter or source (FET) to create RF-N; /archives//html/Amps/2002-04/msg00358.html (8,538 bytes)
9. [Amps] TS-440S Update (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 15 Apr 2002 15:01:43 +0100; Hmm, I'm not sure that is the only answer. NFB, yes, (despite what the audiophools would have us believe!), but there are methods using transformer feedback which have certain advantages. Although an; /archives//html/Amps/2002-04/msg00359.html (8,678 bytes)
10. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 07:11:37 -0700; ALC will always be a problem, but it can be ameliorated with RF-NFB and less than "petal to the metal" mic. gain setting. ? The FCC limit on allowable IMD in the Amateur Radio bands is indeterminate; /archives//html/Amps/2002-04/msg00360.html (10,144 bytes)
11. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 07:31:14 -0700; ? Especially in broadband RF applications, transformers have frequency dependant phase-shift. What is negative feedback at 2MHz can be positive feedback above 20MHz -- just what is needed for oscill; /archives//html/Amps/2002-04/msg00361.html (9,444 bytes)
12. [Amps] TS-440S Update (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 15 Apr 2002 15:30:19 +0100; Something similar has been said about pencil and paper as a wondrous new non volatile low power storage medium! Many years ago, I worked for a guy who said that if you couldn't do it with a twin trio; /archives//html/Amps/2002-04/msg00362.html (7,989 bytes)
13. [Amps] TS-440S Update (score: 1): Author: garyschafer@attbi.com (Gary Schafer); Date: Mon, 15 Apr 2002 10:55:01 -0400; As Colin says, the whole problem is attack time of the ALC. Doesn't anyone make a radio with proper attack time? It can't be that hard to do. It is simply like the AVC system in the receiver. On any; /archives//html/Amps/2002-04/msg00363.html (8,543 bytes)
14. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 16:47:57 -0700; ? The power output is still set for 100W. I increased the V to gain more headroom and less distortion cheers, Guillermo. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures.; /archives//html/Amps/2002-04/msg00373.html (8,535 bytes)
15. [Amps] TS-440S Update (score: 1): Author: nagato@arnet.com.ar (Guillermo); Date: Tue, 16 Apr 2002 02:09:50 -0300; Richard escribió: Thanks for your answer, Richard; from my point of view (my knowledge), what you win is less circulating currents all around the output stage (less I2R losses); what I want to; /archives//html/Amps/2002-04/msg00378.html (9,170 bytes)
16. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 23:10:17 -0700; Or Correct, Guillermo. Distortion happens when the collector V or drain V gets too low (probably around 1V) to attract electrons from the emitter/Source. Starting at 16V gives more headroom above th; /archives//html/Amps/2002-04/msg00379.html (8,291 bytes)

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