<html><head>
</head>
<body style="margin-bottom:45px">
<div style="font-size: 10pt;"><div dir="ltr" style="margin-top:0;margin-bottom:0;">I've seen it done to dual opamps as well, in a Peavey guitar amp, something like 1458, don't recall the exact type.</div><div dir="ltr" style="margin-top:0;margin-bottom:0;">It might be related to their manufacturing process? Maybe they were using a vision process which handled black on silver better than white on black?</div><div dir="ltr" style="margin-top:0;margin-bottom:0;">If they were using a specific bin of a part, because of "sound" reasons, they wouldn't use the regular "CN" extension on them.</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><br></div><div dir="ltr" style="margin-top:0;margin-bottom:0;">Best regards,</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><br></div><div dir="ltr" style="margin-top:0;margin-bottom:0;">Jarno.</div></div><div style="font-size: 10pt;"><div id="LGEmailHeader" dir="ltr" style="margin-top:0;margin-bottom:0;"><div dir="ltr" style="margin-top:0;margin-bottom:0;"><br></div><div dir="ltr" style="margin-top:0;margin-bottom:0;">------ Origineel bericht------</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>Van: </b>Tim Stinchcombe<tim102@timstinchcombe.co.uk></tim102@timstinchcombe.co.uk></div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>Datum: </b>za, 19 mrt. 2016 21:37</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>Naar: </b>'Gordonjcp'<a href="mailto:;synth-diy@dropmix.xs4all.nl">;synth-diy@dropmix.xs4all.nl</a>;</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>CC: </b></div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>Onderwerp:</b>Re: [sdiy] Silver series TL074/84 op amps</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><br></div></div><pre>> I'm not sure it is that special?But then why go to all the trouble and expense of re-processing them (asNils mentions too), unless you can sell them at a premium?By the way, here is the Gearslutz post:<a href="https://www.gearslutz.com/board/7285841-post9.htmlfrom">https://www.gearslutz.com/board/7285841-post9.htmlfrom</a> which"...op amps of the same manufactor can differ in sound over the decades..ther was the silver series from Ti for example that wasnt just betterlooking..."implying they sounded 'better' in some way?!Tim__________________________________________________________Tim Stinchcombe Cheltenham, Glos, UKemail:<a href="mailto: tim102@timstinchcombe.co.ukwww.timstinchcombe.co.uk"> tim102@timstinchcombe.co.ukwww.timstinchcombe.co.uk</a>_______________________________________________Synth-diy mailing<a href="mailto: listSynth-diy@dropmix.xs4all.nlhttp"> listSynth-diy@dropmix.xs4all.nlhttp</a>://<a href="http://dropmix.xs4all.nl/mailman/listinfo/synth-diy">dropmix.xs4all.nl/mailman/listinfo/synth-diy</a></pre></div>
</body></html>