At 11:24 AM 11/5/04 , Roy J. Tellason wrote: >> The ARP VCOs I have seen (and heard) used a weird PNP/NPN pair. > >Yeah, they used either 2N3904/2N3906 or TZ81/TZ581. I didn't know that 2N3904/2N3906 was an odd match. Aren't those parts used together all the time? thanks, Glen