My Googlefoo says that the 2SK209 is the same part as the famed 2SK117 fet's, just in a SMD package vs through hole. I am curious if anyone has aaaaaactually used the 209's and if they are in fact sonically the same or better...or worse??
Looking at some future designs, I don't want to use up my NOS stock of 117's and would like to go to the SMD version if they are sonically the same or better.
Thoughts?
ZC
Looking at some future designs, I don't want to use up my NOS stock of 117's and would like to go to the SMD version if they are sonically the same or better.
Thoughts?
ZC
www.diyaudio.com/community/threads/njfets-for-source-follower-applications.329131/
amongst the many posts I have made on the topic.
Of course the SMD part has a much lower dissipation rating.
So you won't be able to use the BL grade with say 15V rails with good reliability margins.
It all depends on the application.
Patrick
amongst the many posts I have made on the topic.
Of course the SMD part has a much lower dissipation rating.
So you won't be able to use the BL grade with say 15V rails with good reliability margins.
It all depends on the application.
Patrick
I KNEW I had seen a post on here, but I searched and couldn't find it. or maybe i wasn't searching for the right thing.
I want to experiment with this front end circuit. crazy that they ran the front end off +320 and dropped 300v across some resistors down to +20v. I want to experiment running it off a much lower supply, but keep the +20v operating point. so I am a bit concerned if you say +15 max for the 209 parts...then this is not going to work.
I want to experiment with this front end circuit. crazy that they ran the front end off +320 and dropped 300v across some resistors down to +20v. I want to experiment running it off a much lower supply, but keep the +20v operating point. so I am a bit concerned if you say +15 max for the 209 parts...then this is not going to work.
Attachments
and I should clarify, that the fets in each of the four quadrants is actually 3 fets in parallel. so i could use six 209's in each quadrant for the same dissipation rating. would be interesting to experiment with
If you are going to use multiple 2sk209, you'll have to match for idss -- https://www.digikey.com/en/products/detail/peak-electronic-design-limited/PCA23/9687223
If not a test adapter, I would suggest just purchasing a bunch of "SOT223 to DIP" adapters in this application...solder them up and measure.
If not a test adapter, I would suggest just purchasing a bunch of "SOT223 to DIP" adapters in this application...solder them up and measure.