Print Page - MP-1 Noise Mod - TL072IN no longer available, is the 105C max a critical spec?

Title: MP-1 Noise Mod - TL072IN no longer available, is the 105C max a critical spec?
Post by: DesolationBlvd on February 22, 2024, 03:42:28 PM

I want to perform the Noise Mod on my MP-1, since the battery died and I might as well do it while I have the case open, but 511-TL072IN is no longer available at Mouser. I notice it had a +105C maximum temperature, compared to the +85C the other available through-hole TL072s top out at. Meanwhile, the only high temperature TL072s are SMD. Is the maximum temperature a critical spec?

Title: Re: MP-1 Noise Mod - TL072IN no longer available, is the 105C max a critical spec?
Post by: rnolan on February 23, 2024, 12:39:07 AM

Hey DesolationBlvd, my guess is yes, particularly if it's near the tubes or anything else that gets hot. Maybe one/some of our more tech edumacated members can advise but a 20C difference is substantial.

Title: Re: MP-1 Noise Mod - TL072IN no longer available, is the 105C max a critical spec?
Post by: MarshallJMP on February 24, 2024, 11:52:18 AM

Use a OPA2134PA

Title: Re: MP-1 Noise Mod - TL072IN no longer available, is the 105C max a critical spec?
Post by: Gregg on February 25, 2024, 11:56:03 AM

OPA2134PA is also an 85C part, but wouldn't worry about it. Should hold up fine as long as the gear is well ventilated.

If you really wanted to use a higher temp TL072 there are DIP to SMT adapters but it wouldn't bother. MJMP's advice is "sound."

Gregg

Title: Re: MP-1 Noise Mod - TL072IN no longer available, is the 105C max a critical spec?
Post by: DesolationBlvd on February 26, 2024, 06:17:44 AM

Thanks for letting me know of the replacement you would use for the now-discontinued part. I've placed the order now.

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Let's Get Technical => All PREAMP Tech Tips & Support => Topic started by: DesolationBlvd on February 22, 2024, 03:42:28 PM