I'm trying to make a replica Covox Speech thing and I'm getting conflicting information on that resistors were used:

CVX4 : high quality covox adapter

From what I can make out, the resistor is 10uF in yours, keropi. However it sounds like a 80~100uF would sound in dreamblaster's. Why do you think?

Most circuit diagrams for the Covox suggest a 10 ohm ladder but this document says 7.5 ohm:

http://kb.gr8bit.ru/GR8BIT-KB0010-Adding-mult … ce-23102013.pdf

And Beegle seems to think that the Dreamblaster uses even higher resistors.

I've ordered various parts to try but I'm not sure how this will affect the exactness of the replica. How will different resistors change the sound?

And does anyone have a genuine Covox Speech thing who can provide a photo of the circuit board to see the original design? Or better yet, a photo and confirmation with a multimeter.