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Emu 1616 replace broken capacitors

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I have a DigiTech 2101 studio tube and need to know which capacitors (I think there are "8") to replace that have the most affect on the sound quality.thanks!


You can see if a capacitor is bad by looking at the top. If it is flat, it is good. If it looks like the top is bulging, then it needs replacement. Sometimes you will see it leaking under it. If you are capable, you can remove the capacitors to isolate and test with a multimeter.

Dec 18, 2016 | The Music

2 Answers

If i replace my yamaha crossover capacitor, what will be the consequences


The capacitor determines the cutoff frequency of the filter used to either block or pass frequencies above or below the intended design point. Generally, electrolytic capacitors are used for this, due to their capacity for a given size. electrolytic capacitors are manufactured with two foil plates separated by a gauze soaked in electrolyte compound. This electrolyte compound forms a one molecule thick insulation layer. If this electrolyte dries up, the cap will tend to fail, either short or open, usually short. Because the insulation so thn, it is very much affected by the applied voltage (usually DC). Most electrolytic capacitors are used to block DC. these capacitors are usually pretty sensitive to the applied voltage. Most electrolytic capacitors have a WVDC rating, which stands for Woirking Voltage Direct Current. The higher the WVDC rating, the largewr the capacitor for a given capacitance. Also, these capacitors have a very wide tolerance because of this. Typically, this tolerance is +10%/-80%. This rating would indicate that at close to the WVDC rating, the capacitor will be within 10% of its rating. If the capacitor is used in a circuit where the WVDC rating is much higher than the circuit voltage, their will not be enough bias voltage to form the one molecule thick dielectric (insulation) needed for the rated capacitance. So, if the capacitor is rated for 100WVDC and is used in a circuit that only has 40 volts, the effective capacitance will be much lower, and therefor, the crossover frequency would be affected. If the crossover filter is a high pass, then you would risk damage by allowing too much low frequency content to get to the mid/high frequency driver(s). For a low pass configuration, too much high frequency material would get to the woofer, which might affect imaging, but should not damage the driver. Also, electrolytic capacitors come in many varieties. Almost all of them are polarized, meaning that the terminals are marked plus and minus. Capacitors for crossovers are not typically polarized. Here is a link to some non polarized electrolytic caps:
http://www.parts-express.com/term/crossover-caps?c=293,1385

Most audio enthusiasts prefer the sound of polypropylene, polycarbonate or polystyrene capacitors over aluminum electrolytic caps, which also have the advantage of not drying out over time, so they last longer. Also, aluminum electrolytics tend to fail if they do not have a bias voltage applied for a long time. Here is a link to some film cpas for crossovers:
http://www.parts-express.com/term/crossover-caps?c=294,1382

Oct 29, 2012 | Yamaha Emx5016cf S115v PA System

1 Answer

I get random unwanted midi notes triggering while I plug my dd-55 into my emu x-midi 2x2 with my Reaper DAW. I don't know if this is a problem with the emu or the dd-55 itself, but it doesn't...


Check that you don't have MIDI echo on in the DAW. If the MIDI data is echoed, it MAY be merging with the outgoing and when MIDI signals are merged in pieces instead of whole messages the data is corrupted. If you can look at the data stream with software, you should be able to spot the problem. Another problem might be excessive latency of the recording software. Make sure you do not have antivirus or antispyware programs running or network running. The Roland will spill data at much less rate and while the dd55 may overrun the DAW the Roland might not be able to. The key to the problem is to analyze the MIDI data stream that is being recorded.

Sep 05, 2011 | Yamaha DD55 7 Pad General MIDI Digital...

1 Answer

Boots slowly , takes 10min ( bad caps?) and have broken fx selector knob are parts available ? I'm in Canada and the music store I deal with says that Behringer is very slow to resspond to ...


Hi, It is not on selector knob, but it could be on capacitor(s). As stabilizer capacitor has role to maintenance the good power feeds to system. Please check it then.
Regards

Feb 12, 2011 | Behringer Xenyx 1832fx Mixer 18 Input 32...

1 Answer

In play mode the sr 16 goes beserk. It makes a pulsed buzzing sound and plays back the drums distorted. any ideas?


The SR-16 uses an external transformer as the power supply which provides 9 volts AC. This ac power is converted to DC positive and negative voltages for the digital and analog portions of the circuit. Although the unit has been reliable generally, this symptoms sounds like of of the main filter capacitors in the DC converter circuit(rectifier, filters and voltage regulator) has broken loose or is defective. This will affect both channel equally. If the problem is in one channel, a broken shield on a cable or the output jack ground connection might have broken on that one channel.

Jan 22, 2011 | Alesis Sr 16 Stereo Drum Machine

1 Answer

Lowery organ works well but hums please help


Probably needs the filter capacitors in the power supply replaced.

The electrolytic caps dry out after years and become ineffective in filtering to get pure DC current for the electronics.

Other less likely possibility is a broken ground wire someplace within.

Jan 08, 2010 | Boss Micro BR Digital Recorder

1 Answer

Bad Humm out


First disconnect all inputs. If hum is still there, PROBABLY the filter capacitors have gone bad. Replacement is the cure.

IF there is no hum without any inpout cable connected, there is a ground loop and either the ground at the inout connector is broken, or your cables and guitar may have a problem.

Nov 15, 2009 | Marshall Amplification Marshall MG250DFX...

2 Answers

Light indicator is on


Try changing the battery, if it doesn't help, some possibilities are:

- dirty contacts or a broken wire on the footswitch

- a broken wire from the distortion output to the output plug

- a broken wire elsewhere in the unit (e.g. potentiometers or rotary controllers)

- a bad input / output level or other potentiometer or rotary controller

- a burnt out component (a bit unlikely, but possible, and it could be anything)

- a bad connector contact inside the unit

- a bad pin solder contact on ANY of the components inside the unit (wires, connectors, switches, jack plugs, resistors,variable resistors, trimmers, diodes, capacitors, transistors, ICs, etc.)

Broken wires / badly soldered pins need to be resoldered, but if there is damage to any of the components, they wil probably need to be replaced.

I hope you can find out what it is.

regards

3rq8 (Triarcuate)

Jul 26, 2009 | Boss Mt 2 Metal Zone Effects Pedal

3 Answers

Peavey SP 2G has a burnt ceramic capacitor in crossover


Ive been through this. Although it certainly appears to be a ceramic capacitor, its actually called a polyswitch. .65 amp. Parts express carries them. Part no. 071-256.

Mar 28, 2009 | Music

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