Help me find an alternative to 2SK772 for phaser.
I can't find an alternative to the N-channel JFET 2SK772
- bow_and_error
- Breadboard Brother
Information
Saw this over on r/DIYPedals as well, but maybe somebody can add more clarity here about which Idss bin it uses:
Do you have any info on which Idss bin this pedal uses: 2SK772D, 2SK772E, or 2SK772F? If it's anything like the Arion SCH-1, then it's probably the F-variant (2SK772F).
Here are the specs for comparison:
They will likely need to be matched pretty closely, so you'll have to buy more than 4 to get a decently matched quad. I included MPF4393 on that list as it's still in production & easy to find for cheap. If you're having trouble finding those older JFETs, you may want to buy 10-20 and give them a shot instead.
Do you have any info on which Idss bin this pedal uses: 2SK772D, 2SK772E, or 2SK772F? If it's anything like the Arion SCH-1, then it's probably the F-variant (2SK772F).
Here are the specs for comparison:
- 2SK772 - Vp: -0.3-2.5V, Idss: 1.2-12mA - F-variant is the high-Idss bin, so Idss = 5-12mA
- 2SK184BL - Vp: -0.2-1.5V, Idss: 1.2-14mA - BL-variant is the high-Idss bin, so Idss = 5-12mA
- 2N5952 - Vp: -1.3-3.5V, Idss: 4-8mA
- Maybe: MPF4393 - Vp: -0.5-3V, Idss: 5-30mA (mine usually run Vp ~1.7V / Idss ~14mA)
They will likely need to be matched pretty closely, so you'll have to buy more than 4 to get a decently matched quad. I included MPF4393 on that list as it's still in production & easy to find for cheap. If you're having trouble finding those older JFETs, you may want to buy 10-20 and give them a shot instead.
- mauman
- Resistor Ronker
Small Bear has 2N5952 in quantity for $0.59 USD, https://smallbear-electronics.mybigcomm ... et-2n5952/ . They also have 2SK184 green and yellow, but not blue.
- cspar
- Breadboard Brother
There is also this Arion SPH-1 thread with some mods and either schematic corrections/variations.
viewtopic.php?p=243186#p243186
viewtopic.php?p=243186#p243186
"There is discussion, brainstorming, disagreement, testing, verified layout and schematic. We are the fucking stompbox university -- only for those who still read though..." - Modman