J105

[Ian Fritz]

Magnus --

An interesting looking device, indeed. I haven't been able to find these
in small quantities, though. Do you have a source? It would be very
interesting to see what kind of performance you could get. One other
point: the input capacitance is about 10x that of the 2N4391.  As Terry
pointed out, this capacitance causes some spiking. I don't think
switching speed is much of an issue as both devices are fast compared to
the time required for discharge.

  Ian

Magnus Danielson wrote:
> 
> 
> There is also a number of possible improvements over the 2N4391, if
> you are willing to trade switch speed for lower resistance and thus
> have shorter reset time of the oscillator.
> 
> Without much deeper thoughts, I picked out the J105 which has an
> rDS(on) of maximum 3 ohm as compared to the 30 ohm of the 2N4391.