Lionel-77
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Hi,
I'm trying to repair an HF low noise amplifier and I can't find what is the first stage component.
been looking everywhere for a few days but really stuck
The only 301 reference I can find is FDV301N, but that doesn't make sense as it should be a JFET or similar
LNA input impedance is given at 54K Ohms // 12 pF
So the input Fet should be well below 10pF
PIN1 is the Gate , Pin 2 Drain, Pin 3 Source
I would have bet on the usual J310 or BF862 as a first stage but the pinout is not compatible as the gate is on 3.
closer stuff i could find are LSBF510
Did I misread the marking ?
I looked up also ".3" but without success.
Any help really welcome
Thanks
Lionel
I'm trying to repair an HF low noise amplifier and I can't find what is the first stage component.
been looking everywhere for a few days but really stuck
The only 301 reference I can find is FDV301N, but that doesn't make sense as it should be a JFET or similar
LNA input impedance is given at 54K Ohms // 12 pF
So the input Fet should be well below 10pF
PIN1 is the Gate , Pin 2 Drain, Pin 3 Source
I would have bet on the usual J310 or BF862 as a first stage but the pinout is not compatible as the gate is on 3.
closer stuff i could find are LSBF510
Did I misread the marking ?
I looked up also ".3" but without success.
Any help really welcome
Thanks
Lionel