Last Updated: April 29, 1999

        This was a little goodie I picked up at an estate sale about a year ago.  It was brand new in the box.  The price was right, I bought it.  It is more of a curiosity than anything else.  The transistors in the kit are gigantic.  There are no numbers on the package.  I am guessing that they are point contact transistors.  They were, my guess, obsolete when the kit was put together and just a good way of getting rid of surplus junk.

    Still, the book that comes with the kit is interesting.  It goes through the theory of formant synthesis.  Plus, it has an experimenters circuit included.

 Circuit diagram of Formant Voice Synthesizer (.pdf)
 
 

Vowel	First Formant	Second Formant	Third Formant
ee	270	2290	3010
i	390	1990	2550
e	530	1840	2480
ae	660	1720	2410
ah	730	1090	2440
aw	570	840	2410
u	440	1020	2240
oo	300	870	2240
^ (don't ask, thats there?)	640	1190	2390
er	490	1350	1690