[sdiy] You all missed my arp omni chronicles..

[Bob Weigel]

Dang...now I'd better go down and get the brand..wait..no better 
check...Ahh JRC4558.  That probably explains it.  I'm recalling ...I 
think a Peavey application where they recommend one 4558 over another in 
something.  It'll come back to me hopefully.  .  -Bob

Harry Bissell Jr wrote:

>  A guy
>  
>
>>in AH suggested 
>>that there are some op amps which actually in a
>>buffer ap will invert 
>>the output when you hit rail!  
>>    
>>
>
>Phase reversal.  Some opamps (esp. some Linear Tech)
>say right on the data sheet "no phase reversal"
>
>I had this with OP-07 (no phase reversal) and OP-77
>(phase reversal). Imagine what this did to a
>temperature control servo loop. "oops I'm to hot I
>better turn the heat up EVEN MORE !!!"   :^P
>
>
>I had already tried a
>  
>
>>4558 also and this 
>>was the case.  The 1458 is the only amp that works
>>in that particular 
>>type of applications of the three!  Nice...to know
>>that! :)
>>    
>>
>
>I have never seen the 4558 phase reverse. I'll be
>watching for that.
>
>H^) harry
>
>
>
>  
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