[sdiy] VCLFO core circuit..

[Jean-Pierre Desrochers]

I'm about to start building a set of  VCLFO modules
for my synth so I browsed  a lot around
to check for existing designs..
I need it to track with 1v/oct input,
(exponential response) but it would have lin inputs too.
Most of the designs I saw use matched pairs of transistors
for their expo converter part and sometimes
hard to find parts.
Looking around I thought it would be so easy to
use the ARP Odyssey 2800 VCO core design..
http://www.arcenson.com/public/Odyssey_2800_VCO_detail.JPG
Frequency/temperature stability is not a big deal here but
I'd use a TEMPCO anyway (R32).
My question is:
Are the two transistors Q4, Q5 matched or only
stuck together for thermal transfer and stability ?
and if they are matched how are they ?
Thanks
J-Pierre