ENS-76 VCO Option 2 question

[gstopp at fibermux.com]

     That's nuts, Bob! Should work. Ya got me.
     
     I've used the 082 in this way plenty o' times, no problemo. There is, 
     somewhere, a rational explanation for this. Maybe the 071 is damaged 
     inside, weakened perhaps? So that it works in some apps and not 
     others? I can't remember the headphone-driving capabilities of these 
     JFET's off the top of my head... But as a I-V converter like in this 
     3080 circuit, any of these op-amps should work the same (except for 
     bandwidth). The external compensation devices like the 301 and the 748 
     may have some extra hi-freq oscillations, but not the 071.
     
     Be sure ya let us know what it turns out to be (so we can put it in 
     our op-amp X-files).
     
     - Gene
     gstopp at fibermux.com
     
     p.s. I'll be out of the country on a business trip for a week, so 
     ASM-1 queries should be postponed till April.


______________________________ Reply Separator _________________________________
Subject: ENS-76 VCO Option 2 question
Author:  Bob Zimmer <bzimmer at voicenet.com> at ccrelayout
Date:    3/24/97 10:40 AM


I just finished breadboarding this VCO and have one remaining problem.  When 
building, I swapped out the 'old' opamps for TL071's.  This meant replacing 
a 307, 2-748's and 4-556's with 071's. Everything works fine except for one 
piece of the circuit, the Triangle to Sine convertor.
     .
     .
     .