Thanks Patrick, maybe I've missed something, but in order to parallel the two Sot-23 parts, their layout should be reversed on opposite sides?
All the double-sided boards appear to have the same orientation on both sides.
All the double-sided boards appear to have the same orientation on both sides.
For sll Toshiba JFETs, the drain pin and the source pin are reversible.
AND
2SK2145Y = 2x 2 SK209Y
Patrick
AND
2SK2145Y = 2x 2 SK209Y
Patrick
FYI, last time I ordered these from JLCPCB they charged ~$14 for vcut and $3.60 for panelization
2SK2145 Datasheet pinout
2SK2145 Datasheet pinout
I 'only' managed to squeeze 16x17 to stay below the 100mm ceiling for cheap PCBs. 1360 will last for a while 🙂
There is no guaranteed matching specification for 2SK2145.
So in both cases you need to measure.
Depends of course on your application.
Patrick
So in both cases you need to measure.
Depends of course on your application.
Patrick
They're for the phono input of the Pearl 3 which uses 4 parallel transistors per channel, either 2SK209GRs or 2SK170s, Ids around 2.2mA each.
Pairing should lower noise/increase dynamics; matching should eliminate the 10R current balancing resistors on the sources, and improve channel matching. @Boydk got good results with the 2SK2145GRs; I'm thinking that pairs of 2SK209Ys will make it possible to get closer to the target.
Pairing should lower noise/increase dynamics; matching should eliminate the 10R current balancing resistors on the sources, and improve channel matching. @Boydk got good results with the 2SK2145GRs; I'm thinking that pairs of 2SK209Ys will make it possible to get closer to the target.
Only hurdle........ Looks like the Y´s are only carried by Alibaba/AliExpress these days.
"Do you feel lucky, pxxk"?? 🤣
"Do you feel lucky, pxxk"?? 🤣
I think 17,500 pcs should be enough for DIY consumption ?
https://www.digikey.com/en/products...nductor-and-storage/2sk2145-y-te85l-f/4503059
😊
Patrick
https://www.digikey.com/en/products...nductor-and-storage/2sk2145-y-te85l-f/4503059
😊
Patrick
Octopart if you're desperate... luckily I only need 16 so 100 should do it, and put the mismatches on Ali 😆
We actually have danish supply companies, and on Google, they would be the first to show.
Next would be Digikey, Mouser, Franell, RS-Online and TME, if they carry the products searched for.
YMMV....... but I got your point/tease 🤣