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HP/Agilent 6812A A9 output board L500, L501, L502, L503 values
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Topic: HP/Agilent 6812A A9 output board L500, L501, L502, L503 values (Read 1198 times)
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piotekp90
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HP/Agilent 6812A A9 output board L500, L501, L502, L503 values
«
on:
October 09, 2018, 09:31:22 am »
Hi,
Does anybody know the inductance of the L500, L501, L502, L503 inductors in the A9 output board in HP 6812A ac power supply?
I have this power supply but I see that this inductors have cracked cores and I would like to replace it.
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Chris56000
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Re: HP/Agilent 6812A A9 output board L500, L501, L502, L503 values
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Reply #1 on:
October 09, 2018, 09:52:43 am »
Hi!
I wouldn't have thought they'd be much more than 40–100uH each about 3A rating – there's full component–level circuit diagrams in the service manual by the way!
Post clear pictures of the chokes please – it might help us identify replacement core kits you can use to repair them!
Chris Williams
PS!
Have you got one of those little cheap and cheerful Component Testers,?
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It's an enigma that's what it is!! This thing's not fixed because it doesn't want to be fixed!!
piotekp90
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Re: HP/Agilent 6812A A9 output board L500, L501, L502, L503 values
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Reply #2 on:
October 10, 2018, 11:54:23 am »
At the beginning I have checked the service manual and schematic but there is no information about the choke value. If I put the part number on Keysight website I recive an information that this is obsolete part (without any more information about the choke).
I measured the chokes and they have around 100uH.
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piotekp90
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Re: HP/Agilent 6812A A9 output board L500, L501, L502, L503 values
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Reply #3 on:
October 12, 2018, 07:54:53 am »
I have received informatin from Keysignt about this inductors:)
E CORE; 12.6 MM WIDE; 20.5 MM HIGH; 29.2 MM LONG; 1 SECT; FR MATL; 12 PINS; RECT. HOLE. BOBBIN-COIL FORM E CORE; 12.6 MM WIDE; 20.5 MM HIGH; 29.2 MM LENGTH; RECTANGLE HOLE SHAPE; 1 SECTION; APPLICATION : M 42/20; MATERIAL: REINFORCED NYLON 6/6 TO UL94VO; NO. OF PINS: 12 (2X6)
Inductance: 93-101uH @5V ocv. 100kHz 1.2 to 5.6
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