TL072CP or TL072CN for RD50

Aaron_S

After new driver transistors and electrolytic cap job, the amp is sounding great (no more crossover distortion). Is it considered good maintenance practice to also replace all the TL072 chips? (ICs 1,3,4). If so, is there any noticeable difference between a TL072CP (original TI chip) or a TL072CN? I picked up some TL072CN's from Mojotone.

I'd just as soon leave the originals in since everything's working OK. But curious if it's recommended to replace them for reliability or sonic improvements. Thanks for any info! Aaron

Full Name
Rob Flindall
Music Man Equipment
112RD-100 with EVM speaker, built 1981

Member for

10 years 8 months
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RD112 Sat, 11/07/2015 - 14:20

The Japan Radio Corporation 4558 is used in lots of guitar pedals. It has the industry standard pin out of the TL072 and LM1458.

I swapped out all of the TL072s and LM1458s in my RD 112 100 watt. Not sure if it made any real difference...but no worse.
I also tried TL2272 and it was not good.