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 3900pF / 3.9nF 500V 5% K72P-6 TEFLON CAPACITORS. LOT OF 8 NEW CAPS NOS US $10.00 
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 3900pF / 3.9nF 500V 5% K72P-6 TEFLON CAPACITORS. LOT OF 2 NEW CAPS NOS US $1.80
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 100-PCS NEW Capacitors 0.47UF 10% 63V BF074D0474K Polyester Film Cap US $1.29
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 4pcs QUAD NOS .02 uf mfd @ 1000v MICAMOLD Chassis Mount Oil Capacitors Caps US $19.95
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 2 X WEST-CAP CQR09A1 0.18uF 200V JAN CAPACITOR US $9.99
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 2 X WEST-CAP CQR09A1 0.33uF 200V JAN CAPACITOR US $9.99
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 NOS 3pcs Sprague Black Beauty .004 MFD 600V Capacitors Caps US $9.95
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 4pcs QUAD NOS 2 X .1 mfd @ 600v TOBE Chassis Mount Oil Capacitors Caps US $14.95
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 1pcs NOS .5 uf mfd@200v 20 AMP SPRAGUE HYPASS Chassis Mount Capacitor Cap US $6.95
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 1 pc 4700uF 450V Hitachi capacitor TUBE AMP CAP US $29.00
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 10 Vintage NOS West-Cap .033mfd@200v Capacitors US $9.99
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 0.022uF/ 0,022uF 22nF 200V 5% K72P-6 TEFLON CAPACITORS. LOT OF 8 NEW CAPS NOS US $9.00
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 1000 uF 16 VOLT TUBE 105C AMP POWER SUPPLY FILTER CAPACITOR CAPS 105C DEGREE US $27.99
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 Capacitors 1 El Memco 4560pf Mica Cap NOS US $3.00
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 17 RARE Tex-Cap Ceramic Capacitors Lot 1960s .025 uf mfd 200vdc Airforce .022 US $16.99
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 2 PLASTIC 0.01uF 6000VDC Glass Capacitor Oil Cap US $39.99
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 Sprague Bumble Bee Capacitor .022 Less Paul cap. 1950's original. ONE only US $99.99
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 Aerovox 609MR 8 MFD 600V Oil Capacitor Cap with Mounting Hardware US $39.95
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 K40Y-9 capacitor .015 uF NOS paper in oil PIO tone cap Les Paul Historic 335 SG US $9.99
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 24 TUBE era Capacitors! Sprague, Aerovox, Multi-Section, Oil-Filled..24 Caps! US $115.00
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 Capacitors 1 Tobe TPM6S68 .068 600V Cap NOS US $8.00
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 K42Y-2 capacitor .047 uF NOS paper in oil tone cap for Fender Tele Strat PBass US $7.99
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 CAPACITOR DEARBORN 0.082 uf 400 VDC NOS PAPER IN OIL CAP US $8.50
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 Sprague Bumblebee Capacitor .1 uf 400v Excellent tone / guitar caps. 75 Avail. US $9.45
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 Sprague Black Beauty Capacitor .1 uf 400 v Exc tone / guitar caps 30 Avail. US $9.45
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 Lot of vintage capacitors caps Sprague Cornell Dublier Philco chocolate drop NR US $1.00
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 Vintage Astron Firecracker Style Capacitor Cap US $10.00
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 7 West-Cap .03-100v Capacitors NOS 12M1334 PERFECT Tone US $22.99
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 4 West-Cap .047-100v Capacitors A94W Vitamin Q type NOS Tone Audio Guitar US $29.99
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 10 pc 220uF 450V nippon-chemi capacitor TUBE AMP CAP US $14.20
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 10 pc 150uF 450V nippon-chemi capacitor TUBE AMP CAP US $12.00
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 10 pc 100uF 450V nippon-chemi capacitor TUBE AMP CAP US $9.95
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 4pc 680uF 450V nippon-chemi capacitor TUBE AMP CAP US $12.00
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 Vintage WEST-CAP .022mfd 1KV CAPACITORS Radio Tube Fender Gibson Guitar Tone Amp US $14.99
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 Pair NOS .01 mf uf @ 400v MICAMOLD PIO Tone Capacitors Caps US $9.95
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 NOS Evox Rifa PME271M X2 CAPACITORS CAPS .47mfd @ 250V US $9.95
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 1X Illinois Capacitor Axial Electrolytic Cap 22uf @ 500v - Fender Bassman US $3.99
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 4pcs Quad NOS Aerovox Aerolite 2 MFD 300VDCT Electrolytic Capacitors Caps US $9.95
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 Lot 26pcs General Instrument Gen Instr PGHIV 1 MFD 400 VDC Capacitors Caps US $9.95
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 8 pcs Mullard Mustard Capacitors 2200 pF / 400 V, Tone Cap, NOS US $39.00
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 8 pcs Mullard Mustard Capacitors 0.056 µF / 56 nF, 160 V, Tone Cap, NOS US $79.00
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 10 pcs Mullard Mustard Capacitors 0.18 µF / 180 nF, 400 V, Audio Cap, NOS US $79.00
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 KEMET VITAMIN Q 10 uF 35 VOLT GUITAR TUBE AMP CAPACITOR CAPS PRAMP MIXER US $17.99
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 Pair NOS NEW Western Electric KS Electrolytic Capacitors Caps 75000 uF 60VDC US $74.95
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 Good All Capacitors Mixed lot of 600+ caps 100-400volt US $229.95
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 (2X) ERO ROEDERSTEIN CAPACITOR 0.01UF 630V 2.5% KP1838 NEW NOS FILM AUDIO CAPS! US $1.99
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 Capacitors 1 C-1 .0039 1000 VDC Cap NOS US $1.00
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 2 PLASTIC 0.02uF 20KVDC Glass Capacitor Oil Cap US $59.99
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 K40Y-9 capacitor .068 uF NOS paper in oil PIO tone cap 4 Fender Strat Tele PBass US $9.99
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 (2X) ERO ROEDERSTEIN CAPACITOR 0.43UF 200V KP1832 NEW NOS AUDIO CAP! US $1.69
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 (2X) ERO ROEDERSTEIN CAPACITOR 0.01UF 630V KP1838 NEW NOS FILM AUDIO CAPS! US $1.69
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 (2X) ERO ROEDERSTEIN CAPACITOR 0.012UF 1500V KP1832 NEW NOS AUDIO CAP! US $1.69
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 (2X) WIMA CAPACITOR 0.22UF 275V MP NEW AUDIO CAP! US $1.69
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 ERO ROEDERSTEIN CAPACITOR 0.33UF 250V MKT1813 NEW NOS US $1.69
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 Capacitors 1 GI .033 uF 600 VDC Cap NOS US $2.00
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 2 x TC 680uf 50v Capacitors 16 x 26.5 caps 105 degrees US $3.48
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 NEW SOUNDSTORM CAP2000 Capacitor with Digital Voltmeter US $73.99
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 NEW SOUNDSTORM CAP200S 2-Farad Digital Capacitors (Silv US $35.98
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 Capacitors 1 .0068 uF 1200 VDC Cap NOS US $1.50
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 Capacitors 1 6PS-D39 .0039 uF 600 VDC Cap NOS US $3.00
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 Capacitors 1 715P .047 uF 1200 VDC Cap NOS US $3.00
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 .0033 uF 630 VOLT DC GUITAR TUBE AMP CAPACITOR S CAP S US $24.99
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 10 pc 330uF 450V nippon-chemi capacitor TUBE AMP CAP US $23.90
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 NOS NIB Jennings Type X Peanut Vacuum Fixed Capacitor Cap 17,000V 5-25mmfd 17KV US $29.95
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 NEW Soundstorm Cap350s 3.5-farad Capacitors With Digita US $39.99
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 4.7 uF 63 VOLT GUITAR TUBE AMP PREAMP MIXER RECEIVER CAPACITOR CAPS POWER SUPPLY US $13.99
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 2 ASG 0.015uF 3000VDC Glass Capacitor Oil Cap US $29.99
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 3300 uF 25 VOLT TUBE AMP RECEIVER POWER SUPPLY FILTER CAPACITOR CAPS 85 C DEGREE US $17.99
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 1200 uF 35 V TUBE AMP RECEIVER POWER SUPPLY FILTER CAPACITOR CAPS 105 C DEGREE US $19.99
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 470 uF 200 VOLT TUBE AMP RECEIVER POWER SUPPLY FILTER CAPACITOR CAPS 85 C DEGREE US $22.99
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 SPRAGUE .047 uF 600 VOLT GUITAR TUBE AMP AUDIO CAPACITOR MYLAR CAPS ORANGE DROPS US $24.99
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 2200 uF 80 VOLT TUBE AMP RECEIVER POWER SUPPLY FILTER CAPACITOR CAPS 85 C DEGREE US $22.99
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 8200 uF 63 VOLT TUBE AMP RECEIVER POWER SUPPLY FILTER CAPACITOR CAPS 85 C DEGREE US $24.99
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 100 uF 25 VOLT TUBE AMP RECEIVER POWER SUPPLY FILTER CAPACITOR CAPS 105 C DEGREE US $19.99
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 (2X) ERO ROEDERSTEIN METAL FILM CAPACITOR 0.15UF 160V MKT1813 NEW NOS AUDIO CAP! US $1.69
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 Capacitors 1 Sprague .0033 uF 1000 VDC Cap NOS US $2.00
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 12 PIECES NOS MILITARY CAPACITOR .33MFD 300VDC OIL CAPS US $59.00
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 Capacitors 1 220P .0033 uF 1600 VDC Cap NOS US $2.00
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 Capacitors 1 Argonne .02 uF 600 VDC Cap NOS US $1.00
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 Capacitors 1 C-1 .001 uF 1000 VDC Cap NOS US $1.00
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 Capacitors 1 EM .01 uF 600 VDC Cap NOS US $2.00
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 11 PIECES NOS MILITARY CAPACITOR .47MFD 300VDC OIL CAPS US $69.00
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 Capacitors 1 Acrolytic CTW-3165 Multisection Cap NOS US $10.00
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 Capacitors 1 Sylvania Nippon Can Cap NOS 250V 750uF US $10.00
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 Capacitors 1 EM .056 uF 600 VDC Cap NOS US $2.00
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 Capacitors CD Sealpup .25 uF 400 VDC Cap NOS QTY 1 US $12.00
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 2 PP Capacitor 20uf 800V PIO Oil Cap 300B EL156 KT88 6L6 US $30.99
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 6pc 470uF 450V nippon-chemi capacitor TUBE AMP CAP US $14.00
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 Fender AJAX Blue Molded Capacitors .056 @ 200 volt great tone caps for bass US $10.00
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 .011 .05 .1 .5 uF HV 5000 VOLT GUITAR TUBE AMP MYLAR CAPACITOR AUDIO CAPS PREAMP US $19.99
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 NEW Boss CAP2CR 2 Farad Chrome Finish Capacitor US $48.00
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 NOS SPRAGUE TWIST-LOK METAL ELECTROLYTIC CAP CAPACITOR TUBE RADIO WAFER US $1.95
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 9pcs Sangamo Type 30 .047 MFD 400V Capacitors Caps US $9.95
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 Capacitors 1 Nichicon Zenith Can Cap 4 Section NOS US $10.00
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 Can Cap Insulator Plate, FP Multi Section, For Mallory Style Capacitor. NEW US $1.50
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 (2X) ERO ROEDERSTEIN CAPACITOR 0.036UF 1500V KP1832 NEW NOS AUDIO CAP! US $2.99
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Caps Capacitors
CMS Capacitors (Caps Amiga Classics A4000 A2000 A1200 A600 A500)
Simple Ways To Understand The Filter Capacitors In Electronic Circuits
Have you ever wonder why there are so many capacitors in electronic circuit board? They are all scattered through out the whole electronic board. You could see mica capacitors, ceramic capacitors, tantalum capacitors, aluminum electrolytic capacitors, paper capacitors and etc. All of them in the circuit have a function and you can find widespread applications in the electrical and electronics fields. Some of the common situations in which capacitors are employed are as follow:
Electric Field-Power factor correction;-Motor start and run; and -Welding (stored energy in capacitor discharged rapidly)
Electronic Field - Act as filter to remove ripple in power supplies;
- As inter stage signal coupling capacitors- A capacitor will not pass DC, but an AC signal will go through;
- Tuning resonant circuits, oscillator circuits;
- Decoupling in power supplies and amplifiers;
- As part of timing circuit; and
- As waveshapers and filters
In today’s article I’m going to talks about capacitor act as filter to remove ripple from power supplies. Once the AC signal from output transformer passed through diodes it would become an uneven DC. A filtering section is used to smooth out this uneven DC signal. Usually, the filter includes one or more capacitors. The capacitors are then placed between the DC line and ground. The value of the capacitors is chosen carefully to give the filter circuit a certain timing constant or TC. This TC measures how fast the circuit responds to changes in the voltage level. If the circuit has just the right timing constant, it can act to smooth the output voltage, and once the voltage leaves the filter stage, most of the variations or “ripple” should be removed. The AC has been converted into a smooth DC.
If the filter capacitors fail either increase in ESR reading or lose some of its capacitance, the AC signal will be allowed to remain with the DC, creating a signal which is noisier than it should it. This unwanted noise signal can cause problems in electronic circuit. If it happen in computer monitor power supply, the bad capacitors can cause power to blink, low power, voltage shutdown, no display, intermittent display problem ands many more. Now you understand why every time when a monitor has the complaint like above, I would first check all the secondary side filter capacitor with my ESR meter. If all capacitors checked okay I would then move on to another circuit. That’s just one of my troubleshooting methods.
Next, have you seen all the little blue caps around a circuit board? Those small value caps (usually 0.1uf 50 v or 104) are also used to remove noise from electronic circuit. Then what about the function of big filter capacitors we have just mentioned above-aren’t they already removed the unwanted signal? Why not one filter capacitor is enough for each DC line voltage? The answer is that the big filter capacitors (large value) at the secondary side of power supplies is to smooth the DC and remove unwanted lower frequency noise. Meanwhile the small blue resin coated ceramic disc capacitor is more effective in shorting very high frequency noise spikes to ground and to preventing it from getting back into the power supply line and traveling to other circuits.
Hope you are now understand why there are two different types of capacitors in the DC supply line. By the way for the small blue capacitor you can check it with analog meter set to X10k ohms (charge/discharge) or just use a digital capacitance meter to check for the capacitance value. The small blue capacitor has very high chances to go fully shorted compare to electrolytic capacitor which is very rare.
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