> The EFG 2210 sweep function generator s*it itself and static component tests
> proved back to a dicky dual FET with old, old packaging. The code on the
> side of the FET is unreadable. After weeks and months of searching I must
> resort to beggery here in this newgroup, perhance you have the servce
> manual/circuit diagram, or could point me towards it.
>
> Ever g8ful.
> :) Peter Lowrie
If US made, my guess would be a dual jfet by Siliconics; they were famous for making a decent array of well-matched dual jfets. Do a little Sherlock to derive good guesstimate of operating point(s) from supply voltage, resistors (source & drain) and maybe signal level. That will help to find jfets with "good enough" characteristics; you may even get away with discretes. These daze, Fairchild is a good source of jfets; have not looked to see if they have (matched?) duals. Siliconics is now owned & run by Vishay.