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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I’m trying to use passive filtersnoise and “ugg” no more.

I also built a low-pass filter is active. Based on the datasheets they are extremely similar with the exception of the slew rate. When I touch the ground, noise on satellite reduce, but not in subwoofer. Forums New posts Search forums. May 7, 67 7. 072c a better experience, please enable JavaScript in your browser before proceeding.

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

In sound quality that is. No, create an account now. I only use one of its channels. I am making a low power home theater amplifier.

Nikolai Petrenko Member Oct 19, Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Potentiometer Questions Started by norbss Yesterday at A Randall RH G2 to be exact.


You will need dual power supply. You May Also Like: But I concern to reduce noise. I’m guessing the way the circuit was 072 that the CP would not function properly. Nikolai Petrenko Member Oct 8, Aug 13, 55 0.

Filter circuit from construyasuvideorockola. Low frequency hum from the 50Hz or 60Hz electricityhigh frequency hiss or radio interference?? Quote of the day. Problem of subwoofer amplifier. When i connect the filter to the TDA boardsubwoofer hum too loud and some sound like “ugg” or “ups”.

Dec 28, 2. A TL or TL is very common and is available everywhere except not on the moon, are you there? But the problem in the subwoofer amplifier. First I tried a used one I had laying around and the 2nd gain stage would jrf function at all The TL from Texas Instruments and copied by many English speaking companies never oscillates because it has proper frequency compensation.

Dec 28, 1. Just saying hello Started by MichaelaJoy Yesterday at 6: By continuing to use this site, you are consenting to our use of cookies. You must have a wiring or shielding problem if there is noise that is reduced when you touch its ground. I used 2 Tda to 0722d subwoofer speaker.

JRC D pdf Datasheet P1 Part Num IC-ON-LINE

I put the old one back in and unplugged the reverb tank and the problem went away. To participate you need to register. Now you say there is noise but you did not describe the noise. Do you already have an account? Any help would be appreciated! Satellite speakers drive by 1 LA Articles Top Articles Jc resources.


However the reverb on this 072 does function quite well so I’m still scratching my head Media New media New comments Search media.

You must log in or register to reply here. Welcome to our site! But when I buy componentsI forget it.

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

Link of the circuit http: Nikolai Petrenko Member Oct 11, Digital potentiometers are shown but a dual-ganged manual pot will also work. For an accurate crossover the satellite amplifiers need a highpass filter that matches the lowpass filter for the subwoofer.

Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Jan 1, 3. Started by fastline Yesterday at 8: