What is the real name of this part?

[Craig]

Okay guys I know this is a .01uF capacitor. My problem is I'm trying to order from Mouser but cannot find the right part because I don't know how to search it. Is there an "official name" for it. Here is a photo and a schematic if your wondering. It is part of a circuit in a Fender FR212 100 watt guitar amplifier. C49 and C50 caps are circled on the sch ematic. Thanks for any info!

 

[davenn]

Thanks for any info!

They are MKT polyester caps


I don't see any obvious fault with them, why do you want to replace them ??
highly unlikely that there is anything wrong with them, they are a reliable type

 

[shrtrnd]

davenn's got a good point. I'd be more concerned about he TL072 Op Amp (which is also pretty cheap), than the
caps themselves. What is your fault? What is the problem you're seeing?
The best way to try to search for caps, is to try to get a print copy, or actually access the vendor's catalog on-line,
and look for the cap by (1) Type (2) Voltage Rating (3) capacitance.
I HATE those screwy search engines where you try to enter values and let the computer try to filter that information
to suggest options. They never work right as far as I'm concerned.

 

[Craig]

davenn's got a good point. I'd be more concerned about he TL072 Op Amp (which is also pretty cheap), than the
caps themselves. What is your fault? What is the problem you're seeing?
The best way to try to search for caps, is to try to get a print copy, or actually access the vendor's catalog on-line,
and look for the cap by (1) Type (2) Voltage Rating (3) capacitance.
I HATE those screwy search engines where you try to enter values and let the computer try to filter that information
to suggest options. They never work right as far as I'm concerned.

I am posting a pic of the outputs on pin 1 and 7 of the Op Amp TLO 72 any idea what's going on?

 

[Audioguru]

D16 and D17 are producing clipping because the input signal level is too high. Turn down the input level to prevent the clipping. The schematic shows 33 milli-volts (0.033V) but the output of the opamps are much higher.

 

[Craig]

Ok, this is a guitar amplifier and the schematic says use a 5mVac 1khz test tone at the inputs to the amp. The final output at the speaker should be 2.05VAC. So I will check my test conditions and see what happens. That is a new TLO 72 so it shouldn't be the OP. Thanks so much.

 

[Craig]

Ok so this amp is driving me crazy. Seems when i go test it agin I sometimes get different out wave on the scope.I will post pics of the inputs and outputs (today) of the TLO 82, and here are also the voltages.
Input at the jack to amp.
Ac sine wave at 1khz, 5.18 mv VAC
U6A
Pin1- 6.03mv VAC
Pin 2- 5.98mv VAC
Pin 3- 15.08mv VAC
Pin 4- (-) 16.49VDC
U6B
Pin 5- 6.07mv VAC
Pin 6- 6.05mv VAC
Pin 7- 69mv VAC
Pin 8- (+) 16.38VDC
As you can see I have a different conditions today and different waveforms. The OP amp before it is operating perfect. I don't what to do with this POS. lol

 

[Audioguru]

The severe distortion looks normal for a vacuum tube geetar amplifier. A transistor with no negative feedback also produces severe distortion like that.

 

[Craig]

The severe distortion looks normal for a vacuum tube geetar amplifier. A transistor with no negative feedback also produces severe distortion like that.

Problem is I'm running the sine wave thru the clean channel. It should be a very clean match to the input.