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Old 13th February 2004, 05:13 AM   #1
mrstone is offline mrstone  Hong Kong
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Default Can I use LT1083 as a CCS load?

Hi Folks,

If I connect LT1083 as a CCS, could I use it as a CCS load on tube preamp circuit?

Thanks so much!

Mr. Stone
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Old 13th February 2004, 08:03 AM   #2
EC8010 is offline EC8010  United Kingdom
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Sorry, but it would be terrible. A CCS for an anode load needs to be almost as good at 20kHz as 20Hz. None of the IC regulators are any good at 20kHz. They were designed for high current (1000mA) DC use rather than optimised for AC performance while passing perhaps 10mA.
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Old 13th February 2004, 11:00 PM   #3
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U can try a tube CCS 7H-4B for preamp circuit
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Old 4th September 2004, 08:38 AM   #4
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How to connect 7H-4B to be used as a CCS for a preamp tube?
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Old 5th September 2004, 06:08 AM   #5
hacknet is offline hacknet  Singapore
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what about a CCS on the cathode?
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Old 5th September 2004, 05:22 PM   #6
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Dear Mike,

If you want to have the idea on CCS 7H4B, please provide me your e-mail. The cct. diagram is under the copyright of a website.
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Old 7th September 2004, 10:55 AM   #7
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Thanks for the kindness of redwine1118 sending me the schematic which showed CCS as used for tube's heater
whereas my concern is how to use 7H4B as a CCS for the tube's anode.
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Old 7th September 2004, 11:27 AM   #8
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Quote:
how to use 7H4B as a CCS for the tube's anode.
Sorry but a constant current regulator of this type is much too slow for this purpose, the reaction time can be measured in seconds so the bandwith is less than 1Hz!

These regulators consist of a wire of iron in a hydrogen gas, if current should when the wire gets warmer and the resistance increases so the current decrease aso until it stabilise at a certain value. An ordinary lightbulb have the same function but the current is less constant.

Regards Hans
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