AW: E-112 = J112? (JFETS)

[Haible Juergen]

	>>I built a circuit that calls for E-112 JFETs.   I subbed
2N4392s, which
	>>didn't work too well, but today I found a source for J112s.
I can't find
	>>a datasheet for E-112s to compare the two.  Are they
	>>related/interchangable?
	>
	>Yes. J112's will work as far as the Polyfusion stuff goes.

I found that in most synth circuits (apart from VCO discharge, which
is a different story), it's more important to have a similar threshold
voltage (the GS voltage where Id becomes 0), than a specific
model number. Many FETs in synth circuits were selected for
this parameter. 
A SEM VCO or a VCS 3 Trapezoid will work with a variety of
different small signal FETs, but if the the threshold voltage is wrong,
you might end up with wrong Waveforms in the SEM and a Tapezoid
that won't cycle in the EMS.
I use BF245 (the "standard" low cost FET in Germany) all the time, and 
select them for the application.

JH.