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1. [Amps] monitoring tube seal temps (score: 1): Author: "Larry" <n1miw@cox.net>; Date: Sun, 5 Jul 2009 09:26:01 -0400; I've been following the RTTY vs. tube seal temp thread with interest. It was mentioned that you can use the crayon to monitor the seals, but those are one-time use. What about a circuit such as the o; /archives//html/Amps/2009-07/msg00108.html (7,158 bytes)
2. Re: [Amps] monitoring tube seal temps (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Sun, 05 Jul 2009 07:57:20 -0700; ORIGINAL MESSAGE: REPLY: Excellent idea, if the components are available. I have used a temperature gun directly and it works great, if one can access the seals while the amp is operating. RF makes i; /archives//html/Amps/2009-07/msg00113.html (7,984 bytes)
3. Re: [Amps] monitoring tube seal temps (score: 1): Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>; Date: Mon, 6 Jul 2009 00:49:30 +0800; The cat's meow on this kind of thing is a thermal image camera. Just like james bond. You can zoom in on a specific feature and profile the spot pretty precisily. There's a few pics on my qrz page of; /archives//html/Amps/2009-07/msg00115.html (9,070 bytes)
4. Re: [Amps] monitoring tube seal temps (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Sun, 5 Jul 2009 14:45:17 -0700 (PDT); Hi Larry, There are a couple manufacturers (names escape from my moldy old mind this afternoon) making complete sensors, with lenses and signal processing, in a transistor sized case covering up to 3; /archives//html/Amps/2009-07/msg00119.html (8,849 bytes)
5. Re: [Amps] monitoring tube seal temps (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Mon, 6 Jul 2009 09:15:50 +0300; You can probably use the pyroelectric detector from a junked IR movement detector use in burglar alarms. They are quite sensitive and you can use very simple optics, if needed, to measure temperature; /archives//html/Amps/2009-07/msg00122.html (9,099 bytes)
6. Re: [Amps] monitoring tube seal temps (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Mon, 6 Jul 2009 09:07:27 -0700 (PDT); Hi Alex, Those parts won't suffice in this application. They work by summing the signal across multiple (2 or more) areas of the chip and don't produce an absolute output; Essentially an AC device. 7; /archives//html/Amps/2009-07/msg00124.html (8,557 bytes)
7. Re: [Amps] monitoring tube seal temps (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Mon, 6 Jul 2009 14:30:46 -0400; Ok, Lets start with the optics. First of all a simple lense will no do due to the fact that most lenses do not pass infrared very well. The best means of focusing to a point source would be a first s; /archives//html/Amps/2009-07/msg00127.html (9,860 bytes)
8. Re: [Amps] monitoring tube seal temps (score: 1): Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>; Date: Tue, 7 Jul 2009 12:44:01 +0800; Guys, I saw one of the Acom 2000 on the bench of a buddy once. That thing has some sensors in the tube exhaust. It scales up the fan speed based on the temp so the fan only runs at a speed as needed.; /archives//html/Amps/2009-07/msg00133.html (12,150 bytes)

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