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/diy/ - Do It Yourself

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>> No.1634802 [View]
File: 54 KB, 561x639, BF245dynamicResistance.jpg [View same] [iqdb] [saucenao] [google]
1634802

>>1634746
For audio it's still the hand made LED-LDR coupler if you can tolerate the slow reaction. Another option is a JFET (pic).

>> No.1220470 [View]
File: 52 KB, 561x639, BF245dynamicResistance.jpg [View same] [iqdb] [saucenao] [google]
1220470

>>1220420
2N5953 IDSS 2.5..5 mA DSG
BF245A IDSS 2..6.5 mA DSG
2N3819 IDSS 2..20 mA DGS -- grouping?
BF245A comes closest and has the same pinout.

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