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Old 20th October 2011, 05:19 PM   #621
merlin el mago is offline merlin el mago
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I don't understand, could you elaborate?
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Old 20th October 2011, 05:19 PM   #622
Backbones is offline Backbones  United Kingdom
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Quote:
Originally Posted by merlin el mago View Post
Extracted from leonvb BIII manual in the TP site:

"The standard board requires an input voltage of 5.25V and it draws approximately 440mA when one is using the recommended set of Trident shunt regulators"
I had the same problem with a repair manual for the Quad FM4 Tuner. It mentions current draw of 30mA. I found that it drew about six times that, 180mA. In the end I checked it using a power supply (no reg) with a C-R-C filter and measuring the voltage across the resistor.
Chris
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Old 20th October 2011, 05:22 PM   #623
Backbones is offline Backbones  United Kingdom
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I don't understand, could you elaborate?
Salas was indicating the voltage drop across the green LEDs on the current setting circuit.
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Old 20th October 2011, 05:24 PM   #624
merlin el mago is offline merlin el mago
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I doubt that Russ or Brian left a wrong information in his web site, a lot of people buy his products but who knows "errarem umanum est"
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Old 20th October 2011, 05:29 PM   #625
Backbones is offline Backbones  United Kingdom
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I doubt that Russ or Brian left a wrong information in his web site, a lot of people buy his products but who knows "errarem umanum est"
What was it the Sherlock Holmes said? Ah yes, "when you have eliminated the impossible, whatever is left, however improbable, must be the truth".
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Old 20th October 2011, 05:37 PM   #626
merlin el mago is offline merlin el mago
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Measured voltage across all 4 LEDs 7.48V
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Old 20th October 2011, 07:04 PM   #627
merlin el mago is offline merlin el mago
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With a dummy load 11 ohms (two 22R in parallel) reg gets 5.25Vout so 0.5A
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Old 20th October 2011, 07:10 PM   #628
merlin el mago is offline merlin el mago
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Connected again the B3 & still the same problem can't reach 5.25Vout
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Old 20th October 2011, 07:32 PM   #629
coolhead is offline coolhead  Malaysia
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What's the load consumption? If it's for BII or III here is the reason why sounds good...
It is for BII.
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Old 20th October 2011, 07:40 PM   #630
merlin el mago is offline merlin el mago
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This current have to be for a Trident, wich one XO, right?
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