[sdiy] Tempco, was Transistor help

[Fiercefish]

Thanks to all who replied, I have tested a bunch of the transistors and the hFE varied from about 130 to 200, I found about 8 that matched at 166, do you reckon this would be ok to use in the soundlab VCO's? From what I can gather a matching hFE is better than just randomly sticking any pair in but not as precise as the traditional method, no?

Also re the tempco's would these be suitable?

http://www.maplin.co.uk/Module.aspx?ModuleNo=2218&TabID=1&source=15&WorldID=&doy=26m4&Cache=#CacheID

The design calls for 2k PTC but would I be able to use the 4.7k above if I changed the circuit a bit? Any thoughts welcome!

BTW I promise to post some pics up when I finally finish the Soundlab, it will look pretty cool in a nice old hardwood cigar box with an aluminium panel and cool wide skirt numbered knobs.

FF
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