Where can I find an N-jfet with high transconductance, low noise, zero tempco at 2..10mA which will be part of LTP in an amplifier without glogal NFB?
I think you are asking for the almost impossible. Hi Gm does not easily give zero tempco, as you have to have a turnoff bias of about .8V, unless you start with really high Idss, which Toshiba (usually the highest Gm fets) doesn't have easily available.
You might buy a Marantz CD player with HDAM modules and take it out of the PCB. Mine is full of them, but I am enjoying its sound 😀 .
I can see precisely why these Marantz CD players sound grainy, have a harsh top end, constricted sound stage and a flat, undynamic overall sound, leading to listener fatigue after an hour or so.
They are using feedback.
😀
They are using feedback.
😀
Zero tempco is 2.77 V from Vt I'll believe so 2-10 mA + gm + zero tempco is an impossible equation.roender said:
This can be done. the RIAA amp Pearl has a couple of JFET's in parallel.CBS240 said:Parallel J-fet's?
- Status
- Not open for further replies.