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1. [Amps] Led display problem (score: 1): Author: Patrick EGLOFF <pegloff@gmail.com>; Date: Mon, 18 Apr 2005 23:29:30 +0200; Hi All, I'm new on this list... I'm planning to build a 2m amp with a 4CX1500B tetrode. I want it a bit state of the art and replace the meters with LED bars. My design will be a cathode driven, DC g; /archives//html/Amps/2005-04/msg00379.html (6,710 bytes)
2. Re: [Amps] Led display problem (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Tue, 19 Apr 2005 00:46:04 +0100; Personally I don't think bargraphs are as useful as analogue meters, but, if that is what you want, there are few options. 1) You can easily use a small transformer to power the circuit. Rectify the; /archives//html/Amps/2005-04/msg00380.html (8,001 bytes)
3. Re: [Amps] Led display problem (score: 1): Author: "wc6w@juno.com" <wc6w@juno.com>; Date: Tue, 19 Apr 2005 03:55:22 GMT; Hi Patrick, The old Burr Brown (now Texas Instruments) INA117 diff amp can tolerate up to +/- 200V on its inputs. Analog Devices makes a similar part, whose number escapes my recall at the moment, wh; /archives//html/Amps/2005-04/msg00382.html (8,082 bytes)
4. Re: [Amps] Led display problem (score: 1): Author: G3rzp@aol.com; Date: Tue, 19 Apr 2005 03:51:46 EDT; But a bit more difficult to measure the other currents and voltages for which the reference et the cathode level. Has anyone an idea how to do that, on a simple way ? I agree with David Kirkby about; /archives//html/Amps/2005-04/msg00388.html (7,019 bytes)
5. Re: [Amps] Led display problem (score: 1): Author: Steve Thompson <g8gsq@ic24.net>; Date: Tue, 19 Apr 2005 09:20:26 +0100; Opto isolators? Some have a reasonable linear range, or you can use a second one and an opamp to correct any non-linearities. With any of the suggested solutions, you'll need to take care to protect; /archives//html/Amps/2005-04/msg00390.html (7,736 bytes)
6. Re: [Amps] Led display problem (score: 1): Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>; Date: Tue, 19 Apr 2005 09:41:32 +0100; Maxim make a range of current monitoring ICs for exactly this kind of purpose. The two input terminals are connected by a low-value shunt resistor, and can 'float' up to about 30V. Output is a voltag; /archives//html/Amps/2005-04/msg00391.html (8,295 bytes)
7. Re: [Amps] Led display problem (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 19 Apr 2005 09:30:57 -0400; how about a hall effect sensor??? Hi All, I'm new on this list... I'm planning to build a 2m amp with a 4CX1500B tetrode. I want it a bit state of the art and replace the meters with LED bars. My des; /archives//html/Amps/2005-04/msg00397.html (8,385 bytes)
8. Re: [Amps] Led display problem (score: 1): Author: Tony King - W4ZT <amps@w4zt.com>; Date: Tue, 19 Apr 2005 16:33:28 -0400; If you really like the LED bar meters you should take a look at Paul Hewitt's display at <http://home.earthlink.net/%7Ewd7s/ds-1.htm>. 73, Tony W4ZT _______________________________________________ Am; /archives//html/Amps/2005-04/msg00403.html (9,429 bytes)

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