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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Nikolai Petrenko Member Oct 15, The datasheet says that at low gain it will probably oscillate. Either 2 bad chips or not meant to work on that application. May 7, 67 7. 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. Started by fastline Yesterday at 8: When I touch the ground, noise on satellite jrx, but not in subwoofer.

Problem of subwoofer amplifier. Link of the circuit http: I think the New Japan Radio opamp uses Toshiba’s design. You can certainly use the NJM parts. Nikolai Petrenko Jjrc Oct 19, I’m trying to use passive filtersnoise and “ugg” no more. Filter circuit from construyasuvideorockola.

Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Your name or email address: Satellite speakers drive by 1 LA Then I installed a brand new CP and has the exact same results.


Problem of subwoofer amplifier | Electronics Forum (Circuits, Projects and Microcontrollers)

I am making a low power home theater amplifier. I used 2 Tda to drive subwoofer speaker.

Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at A TL or TL is very common and is available everywhere except not on the moon, are you there?

Jan 1, 3. Ziddik Member Oct 15, Do you already have an account? The TL from Texas Instruments and copied by 072r English speaking companies never oscillates because it has proper frequency compensation.

This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. But the problem in the subwoofer amplifier. Thread starter Nikolai Petrenko Start date Oct 8, Yes, my password is: Nikolai Petrenko Member Oct 8, Click here to register now. No, create an account now. Dec 28, 2.

jrc d Stock and Price by Distributor

This chip is in a dual gain stage of a solid state guitar amp. A Randall RH G2 to be exact. Dec 28, 1. You must have a wiring or shielding problem if there is noise that is reduced when you touch its ground.


For a better experience, please enable JavaScript in your browser before proceeding. Now you say there is noise but you did not describe the noise. The digital modem for my cable internet causes a clicking noise in my nearby stereo and in my wireless telephone.

Any help would be appreciated! I only use one of its channels. Digital potentiometers are shown but a dual-ganged manual pot will also work. I also built a low-pass filter is active.

( 4 pcs/lot ) Dual J-FET OpAmp IC NJM072D, JRC OP-AMP NJM072 072D.

When i connect the filter to the TDA boardsubwoofer hum too loud and some sound like “ugg” or “ups”. I put the old one back in and unplugged the reverb tank and the problem went away. Welcome to our site!

I use 1K resistor and 1uF, and and variable resistor to control cutoff frequency point, but the variable seem be not effect. What is jrd about active filter??? However the reverb on this amp does function quite well so I’m still scratching my head You must log in or register to reply here.

They are near as damn it the same thing.