4x Dual J-fet OPAMP IC Njmd JRC Op-amp Njm d. Be the first to write a review. About this product. Picture 1 of 3; Picture 2 of 3; Picture 3 of 3. Hey I’ve got an old keyboard amp lying around, and It’s got four 8-pin IC’s in it, labelled D JRC Anybody have any idea on what these. EPCOS AG. Part No. CXOD-FREQ-OUT3. Description, CRYSTAL OSCILLATOR, CLOCK, MHz – MHz, TTL OUTPUT. File Size, K / 1 Page.

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Satellite speakers drive by 1 LA You will need dual power supply.


Then I installed a brand new CP and has the exact same results. Nikolai Petrenko Member Oct 15, I’m trying to use passive filtersnoise and “ugg” no more.

By continuing to use this site, you are consenting to our use of cookies. I use 1K resistor and 1uF, and and variable resistor to control cutoff frequency point, but the 072x seem be not effect.


I only use one of its channels. Nikolai Petrenko Member Oct 8, Digital potentiometers are shown but a dual-ganged manual pot will also work. A TL or 0072d is very common and is available everywhere except not on the moon, are you there?

I used 2 Tda to drive subwoofer speaker. I’m guessing the way the circuit was designed that the CP would not function properly. Thread starter Nikolai Petrenko Start date Oct 8, Dec 28, 1. Or many other types also.

For a better experience, please enable JavaScript in your browser before proceeding. A Randall RH G2 to be exact.

Low frequency hum from the 50Hz or 60Hz electricityhigh frequency hiss or radio interference?? Yes, my password is: December Automotive Industry Roundup: Nikolai Petrenko Member Oct 19, Quote of the day.

Welcome urc our site! Jan 1, 3. You May Also Like: But I concern to reduce noise. When I touch the ground, noise on satellite reduce, but not in subwoofer.

d JRC In Stock. Call Toll Free | DF Sales

Design formula are pretty easy in attached. For a 2nd-order rolloff you can use a Sallen-Key filter with a dual-pot to vary the rolloff frequency such as shown here. New Japan Radio says on its datasheet 702d the NJM that in certain applications like a follower low gain it may oscillate.


Started by fastline Yesterday at 8: Either way I have since discovered that the chip is not the real problem anyway. In sound quality that is. First I tried a used one I had laying around and the 2nd gain stage would not function at all They are near as damn it the same thing.

Based on the datasheets they are extremely similar with the exception of the slew rate.