[volt-nuts] Datron 4910 components

[Frank Stellmach]

Steve,

yep, it's in the LTZ100 thread.
We discussed intensively the sense or nonsense of those slots in the 
Datron PCB design, which is very often (blindly) copied by others...

Mickle T. contributed the already known schematics and he measured all 
resistor values of the Vishay array.

Then, quarks simply added a schematic of this array, which he received 
directly from Vishay, obviously.

So, Datron used 21 Ohm in series with the Zener for better T.C. 
(originally 50ppm/K), 9k/659 as initial divider for temperature 
regulation (altered by the external temp. PWM), 128 Ohm for the Zener 
current, 39k as collector resistor for the reference transistor.

There's no complete schematic yet, but now it's possible to finalize that.

Here's the link:

http://www.eevblog.com/forum/projects/ultra-precision-reference-ltz1000/300/

Frank