[sdiy] discrete/no-OTA VCO

[DAF]

Hello - can someone point me to a circuit for a  voltage-controlled lfo that 
uses discrete or other easy to source parts.  I have used an OTA-based 
design in the past, but I want to design around more generic parts.  I seem 
to remember a vco that used a discrete JFET?  I don't neet expo response or 
temp compensation.  I am looking for about a 2 to 10 Hz response range.  I 
don't want to use any specialty chips or OTA's, just discrete transistors 
and op-amps.   Any help greatly appreciated.

thanks,
Dave