there is established practice of many, worldwide, when making successful pilgrimage to Mecca, they added "Pilgrim" to their family name
so, Mighty finishing task of reaching Singing Bush twice ( 2011 and 2019), feel free to call me Mighty Pilgrim ZM
that, speaking of adherents and such
View attachment 1129326
I see you get younger from year to year, so pilgrimage seems to be useful.......
:--))
Indeed, this could be very interesting! And the store could offer some adapter boards with presoldered SMD chips!It could be fun to do a version with the TI JFE2140, production availability, already matched, low cost, low noise.... But of course in SMD only....
Something like this: https://www.ti.com/tool/DIP-ADAPTER-EVM
The datasheet for JFE2140 here
I like that airframe Choky. Hopefully you will make one more pilgrimage to “touch the Pass” rockthere is established practice of many, worldwide, when making successful pilgrimage to Mecca, they added "Pilgrim" to their family name
so, Mighty finishing task of reaching Singing Bush twice ( 2011 and 2019), feel free to call me Mighty Pilgrim ZM
that, speaking of adherents and such
View attachment 1129326
Take a detour. Have a spare room. So I can listen to the special cardboard proto you will be bringing to sea ranch, just to get a viking opinion on it before showing it to paif not earlier, then for this year's BAF

That’s the first thing that occurred to me! This would be the gain stage for an F4… if you don’t have some pre or flea or headphone amp driving it.Please give us some new F4 type toys. The F4 concept is seriously awesome.
Just use the M2OPS.
You cannot go much higher in voltage with J113 in this (essentially a) discrete opamp anyway.
https://www.diyaudio.com/community/...in-class-a-b-and-maybe-a-power-whammy.390636/
Patrick
You cannot go much higher in voltage with J113 in this (essentially a) discrete opamp anyway.
https://www.diyaudio.com/community/...in-class-a-b-and-maybe-a-power-whammy.390636/
Patrick
I have three questions:
1) Can 2SK2145BL be used for the Input JFETs?
2) A more intriguing question I have is about "Detail Retrieval". I tried one such gain stage from Juma's collection. It has more detail retrieval when connected to my Topping E50 DAC RCA outputs compared to any other of many preamps I have tried. So the question is what causes the difference in detail retrieval from one gain to another?
3) How would this DIY Front End 2022 perform in detail retrieval? Perhaps, Nelson can comment. Thanks.
1) Can 2SK2145BL be used for the Input JFETs?
2) A more intriguing question I have is about "Detail Retrieval". I tried one such gain stage from Juma's collection. It has more detail retrieval when connected to my Topping E50 DAC RCA outputs compared to any other of many preamps I have tried. So the question is what causes the difference in detail retrieval from one gain to another?
3) How would this DIY Front End 2022 perform in detail retrieval? Perhaps, Nelson can comment. Thanks.
I have three questions:
1) Can 2SK2145BL be used for the Input JFETs?
2) A more intriguing question I have is about "Detail Retrieval". I tried one such gain stage from Juma's collection. It has more detail retrieval when connected to my Topping E50 DAC RCA outputs compared to any other of many preamps I have tried. So the question is what causes the difference in detail retrieval from one gain to another?
3) How would this DIY Front End 2022 perform in detail retrieval? Perhaps, Nelson can comment. Thanks.
Do 2 x 2 x 2sk170 in parallel (2 on either side) on the differential input at front end.
Haven't personally played with 2sk145BL but I am confident the combination above should easily beat it.
Last edited:
Yeah. This i what i am talking about!
It fits like a glove in front of my going to be built 2023, the ZM Lazy Singing Bush 🎷🙂🎸
Thanks Mr. Pass!
But i wont need it in my 2023 gonna be built ZM not lazy - Singing Bush. 🥁🙂🎻
…If i have got things right so far…
It fits like a glove in front of my going to be built 2023, the ZM Lazy Singing Bush 🎷🙂🎸
Thanks Mr. Pass!
But i wont need it in my 2023 gonna be built ZM not lazy - Singing Bush. 🥁🙂🎻
…If i have got things right so far…
What omissions / additions might be warranted to use this in the front end of a SIT-3 style amp? I'm thinking 4X gain and best possible performance driving an autoformer. I'm still really liking the autoformer VAS these days. The OPA828 / LME49600 FE in my sig is fantastic. But still willing to try a discrete vs.... shootout for fun. I checked last night and it looks like I have enough matched K170's in my stash to get this FE together.
- Home
- Amplifiers
- Pass Labs
- DIY Front End 2022