[sdiy] Aries modular schematics detail

[Grant Richter]

> There are two transistors and a tempco.  I tried to measure the value
> of the tempco and I get something like 3K at room temperature. It's a
> NPN / PNP for sure, probably with an extra current source for the
> linear ramp. The triangle is the master and the ramp is syncronised to it.
> 
Then it would be from the base of the NPN to ground to form the lower half
of the 1 volt to 18 millivolt divider.