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Old 3rd February 2012, 05:54 AM   #1
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Default JFET Identification

I'm trying to repair a C-J preamp damaged by ESD. I cannot identify one of the damaged JFETs marked "CAL JF 1182B" ("CAL" I believe is Calogic.) The device is paired with a CAL J177 which is a Calogic P-channel FET - so the device in question is the complementary N-channel device. But I cannot find any reference to this device online, although the J177 is readily available.

I'd appreciate any help.

Thanks
Kofi
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Old 3rd February 2012, 06:21 AM   #2
EUVL is offline EUVL  Europe
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The closest complementary to J177 is J113, also available from Calogic, among others.


Patrick
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Old 4th February 2012, 06:45 AM   #3
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Yes, the characteristics of the J113 seem close to what the circuit was designed for. I will give these a try. But if anyone knows exactly what device the markings correspond to I'd like to know.

Thanks very much.

-Kofi
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Old 4th February 2012, 07:21 AM   #4
osscar is offline osscar  Latvia
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Hi,
Do not forget that different manufacturers have different pin-out for j113!

regards

o.
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