Paper/Oil Capacitors

The best sounding capacitors for audio powersupplies, decoupling stages, speaker crossover filters, etc are Paper/oil capacitors. These film capacitors use oil soaked paper as di-electric material and are therefore well damped and very smooth and natural in sound. Most of the capacitors we sell were made with militairy specifications and have very good (mil-)specs, are made very precise, and because of that sound best of all. Bandwidth is very high, and distortion very low. A special version of the paper in oil capacitor is the Sprague Vitamine Q, they are rated best in sound by many people.

Paper in oil capacitors sound far better than any modern new production like Jensen, Jupiter Beewax or Audionote, not even speaking of any plastic audiotypes, like Auricaps, Hovland, MKP, or whatever MKP with golden letters (and prices). We (also independent people) did a lot of tests with them, and they win all the time. If you like to try them, I give a better sound guarantee. If they do not sound better then what you have, you can send them back to me, for a full money refund (excluding shipping).

Note: I have many more values and voltages available than listed here. Only those are in smaller quantities and too much work to list at this moment. If you need anything special, please ask me. Measurements given in descriptions are without connections, so only the case.

For mounting clamps, please take a look under Mounting stuff


Paper/oil Capacitors

TypeDescriptionStateBrandNumber in stockPrice each (Euro)

470pF/200VAxial, Steel housing, glass sealed. K40Y-9 codes, 0.5 cm diameter, 2.3 cm longNOSRussian2002.35
500pF/15.000Vaxial, metal housing, 1.5 cm diameter, 7.5 cm longNOSDubilier44.00

1nF/600VAxial, metal housing, glass sealed, CP05A1KF102K mil codes, 0.6 cm diameter, 2.2 cm longNOSWest-Cap
Astron
Aerovox
14
14
12
3.50
1nF/1000VAxial, metal housing, 0.9 cm diameter, 3.7 cm long, MetalmiteNOSTCC302.75
1.5nF/200VAxial, Steel housing, glass sealed. K40Y-9 codes, 0.5 cm diameter, 2.3 cm longNOSRussian502.40
2nF/3000VAxial, plastic housing, 2.0 cm diameter, 4.5 cm longNOSWego83.75
2.2nF/200VAxial, Steel housing, glass sealed. K40Y-9 codes, 0.5 cm diameter, 2.3 cm longNOSRussian5002.50
3.3nF/200VAxial, Steel housing, glass sealed. K40Y-9 codes, 0.5 cm diameter, 2.3 cm longNOSRussian502.65
3.3nF/400VAxial, plastic coated metal housing, CP09A1KE332K datecodes, 0.7 cm diameter, 2.2 cm longNOSAerovox
CDE
31
8
3.25
4.7nF/600VAxial, Steel housing, great signal capacitors, 0.8 cm diameter, 2.3 cm longNOSWest-Cap323.75
6.8nF/200VAxial, Steel housing, glass sealed. K40Y-9 codes, 0.5 cm diameter, 2.3 cm longNOSRussian502.75
6.8nF/350VdcMetallised paper/plastic, yellow round housing, 1.0 diameter, 2.5 cm long, good sounding and cheap capsNOS???17210 for 2.25

10nF/200VMetal housing, 2.3 cm long, 0.8 cm diameterNOSGudeman
Pyramid
Astron
5
3
15
4.50
3.50
3.50
10nF/600VAxial, Steel housing, great signal capacitors, 0.8 cm diameter, 2.3 cm long, picture (right)NOSWest-Cap6933.90
10nF/630VdcMetallised paper/plastic, yellow square housing, 0.7 x 0.4 cm square, 1.2 cm long, good sounding and cheap decoupling capsNOS???49010 for 5.50
10nF/1000VAxial, plastic covered metal housing, 1.0 cm diameter, 3.2 cm long, MPNOSITT243.50
10nF/1600VdcMetallised paper/plastic, yellow square housing, 1.2 x 0.6 cm square, 2.2 cm long, good sounding and cheap decoupling capsNOS???3010 for 4.50
10nF/1600VMetal housing, 3.5 cm long, 1.5 cm diameterNOSAerovox403.50
10nF/4000Vaxial screw connections, metal housing, 1.6 cm diameter, 7.2 cm longNOSDubilier93.50
15nF/630VAxial, metal housing, 1.0 cm diameter, 2.2 cm long, datecode 1980, great soundNOSRussian482.95
16nF/63VdcMetallised paper/plastic, yellow round housing, 1.0 diameter, 1.5 cm long, good sounding and cheap capsNOS???9610 for 2.25
22nF/1000VAxial, metal housing, 1.1 cm diameter, 3.2 cm long, screw metal base mountingNOSSic-Safco
Picture (alike)
32.90
33nF/100VAxial, CP05A1KB333K3 codes, 0.6 cm diameter, 2.0 cm longNOSC-D82.50
36nF/200VAxial, 0.6 cm diameter, 2.0 cm longNOSSprague243.50
47nF/250VAxial, 1.1 cm diameter, 2.1 cm long, house is connected to one side, this side has screw mountNOSSic-Safco172.65
47nF/400VAxial, Steel housing, glass sealed. K40Y-9 codes, 1.0 cm diameter, 2.9 cm longNOSRussian764.75
50nF/350Vdc20A paper/oil feedthrough capacitor (house ground and two output connectors), 1.8 cm diameter, 6.0 cm longNOSDublier QL501.50
50nF/1000VGrey metal case, including mounting brackets, 4.6 x 2.5 cm square, 1.9 cm highNOSCornell-Dubilier
Picture
287.50
56nF/200VGrey metal case, QR39A1KC563U3P mil code, 1.0 cm diameter, 2.3 cm longNOSGudeman744.50
68nF/400VAxial, Steel housing, glass sealed. K40Y-9 codes, 1.0 cm diameter, 3.6 cm longNOSRussian806.50

100nF/100VAxial, ceramic housing, 0.8 cm diameter, 1.3 cm longNOSPlesmin261.90
100nF/200VAxial, metal housing, 1.0 cm diameter, 2.7 cm longNOSAHC32.90
100nF/250VAxial, metal housing, 1.1 cm diameter, 3.2 cm long, screw metal base mountingNOSSic-Safco
Picture
353.10
100nF/350VAxial, metal housing, 1.2 cm diameter, 3.8 cm longNOSDubilier14.50
100nF/400VAxial, glas sealed capacitor, great sound like Sprague Vitamin Q, plastic coated metal housing, 1.5 cm diameter, 3.0 cm longNOSWest-Cap
Picture
6387.75
65.00@10
100nF/400VAxial, glas sealed capacitor, great sound, plastic coated metal housing, 1.5 cm diameter, 3.0 cm longNOSAstron
Picture
7646.00
50.00@10
100nF/1000VAxial, Steel housing, glass sealed. K42Y-2 codes, 1.4 cm diameter, 3.7 cm longNOSRussian246.50
100nF/1000VAxial, Type 4705A, metal housing, 1.9 cm diameter, 5.5 cm longNOSDubilier48.90
100nF/1500VAxial, metal housing, CP26A1EH104K1, ARMFP-15-1-10, 2.7 cm diameter, 5.5 cm long, PictureNOSAstron208.50
100nF/3000VHeavy metal housing, house is ground, Type 1873, 3.8 cm diameter, 11.2 cm highNOSSSC/TJ218.50
100+100+100nF/600VMetal housing, House is ground, including mounting bracket, 4.3 x 1.4 cm square, 4.2 cm high, PictureNOSAerovox (sealed)
Cornell-Dubilier (sealed)
Sprague
42
3
6
5.50
5.50
5.00
125+50nF/400VHouse is ground, 3.3 x 1.7 cm square, 2.8 cm highNOSSprague
CRV
14
6
3.50
150nF/200VMetal case, CQ05A1KC154K3 mil code, glass sealed, 1.0 cm diameter, 2.9 cm longNOSWest-Cap233.25
150nF/350VMetal case, C299A, 4.3 x 2.4 cm square, 5.0 cm highNOSMilitairy made68.50
150nF/400VAxial, Steel housing, glass sealed. K40Y-9 codes, 1.6 cm diameter, 3.1 cm longNOSRussian257.25
180nF/50VMetal case, mil M39022/01 code, great coupling cap for transistor audio, 0.8 cm diameter, 2.3 cm longNOS???233.75
200nF/200VGlass sealed, XFS-1937-10 codesNOSGudeman83.50
220nF/200VAxial, Steel housing, CQR39A1KC224K3P mil codes, great signal capacitors, 1.5 cm diameter, 3.0 cm long, picture (left)NOSWest-Cap1595.75
220nF/400VAxial, Steel housing, glass sealed. K40Y-9 codes, 1.6 cm diameter, 4.3 cm longNOSRussian257.75
220nF/400VSteel axial housing, CP05A1KE224K3 mil codes, 1.5 cm diameter, 3.5 cm longNOSSangamo
Gen. Instr.
20
4
10.00
220nF/400VSteel axial housing, CP04A1KE224K3 mil codes, 1.5 cm diameter, 3.5 cm longNOSWest-Cap1010.00
220nF/1000VAxial, Steel housing, glass sealed. K40Y-9 codes, 2.0 cm diameter, 5.3 cm longNOSRussian348.75
250nF/200VAxial, Steel housing, paper/plastic dielectricum, 1.3 cm diameter, 2.3 cm longNOSCDE302.75
250nF/250VPlastic half round case, axial connections, 1.2 cm diameter, 2.5 cm long, PictureNOSERIE104.75
250nF/250VSquare metal case round case, MP, D0,25/250NOSSiemens44.75
250nF/350VMetal case with screw holes at the bottom, radial connections, 2.6 cm diameter, 2.7 cm highNOSMilitairy
Picture
375.75
250nF/1000VMetal half rounded square case, 3.4 cm x 1.5 cm square, 5.0 cm high, PictureNOSSprague
Sangamo
Tobe
6
8
1
11.50
10.50
8.50
250nF/1500VMetal half rounded square case, CQ72B1GH254K3 mil codes, 4.3 cm x 2.5 cm square, 5.7 cm highNOSHEC28.50
250nF/3000VGrey metal case, CP70E1EL254K mil codes, big ceramic connections, 6.3 x 3.0 cm square, 9.0 cm highNOSCornell-Dublier511.50
250nF/7500VLarge metal case, big ceramic connections, 6.5 x 8.5 cm square, 11.5 cm high, including mounting brackets. Great signal capacitor for ESL'sNOSDubilier Nitrogol
Picture
814.50
250+250nF/600VMetal case, including mounting brackets, 3.6 cm x 1.9 cm square, 5.0 cm highNOSOCO (France)
Picture
624.90
250+250+250nF/400VMetal case, including mounting brackets, 4.5 cm x 2.3 cm square, 4.3 cm highNOSAerovox
Picture
1895.75
270nF/200VAxial, Plastic covered steel housing, glass sealed, P323ZN212 mil codes, 1.1 cm diameter, 3.0 cm longNOSAerovox285.25
270nF/200VAxial, Plastic covered steel housing, glass sealed, 118P22492S4 mil codes, 1.0 cm diameter, 2.2 cm longNOSSprague25.75
330nF/200VAxial, Steel housing, glass sealed, CQR39A1KC334K3P mil codes, 1.5 cm diameter, 3.5 cm longNOSWest-Cap136.75
390nF/300VAxial, metal housing, glass sealed, can be mounted with tab, which also is one of the connections, other connectiong is wire lead. 186P39493S12 mil codes, 1.7 cm diameter, 4.0 cm longNOSSprague48.50
470nF/400VAxial, Steel housing, glass sealed. K40Y-9 codes, 1.8 cm diameter, 5.3 cm longNOSRussian348.75
470nF/600VAxial, Steel housing with screw and one connection at one side, both sides also have wire leads, glass sealed, CP11A3KF474K3 mil codes, 1.9 cm diameter, 6.0 cm longNOSWest-Cap
Sangamo
2
1
14.50
470nF/630VGrey metal case, axial, 2.5 cm diameter. 4.7 cm long, screw mounting on houseNOSSic Safco
picture
109.50
500nF/600VGrey metal case, M-type, KS8545, with mounting brackets attachedNOSGudeman313.50
500nF/1000VMetal case, 3.3 cm x 1.6 cm square, 7.0 cm high, PictureNOSSangamo
GE
Sangamo (other shape)
8
2
4
14.50
14.50
14.50
500nF/1600VGrey metal case, 4.3 x 3.3 cm square, 5.0 cm high, including mounting bracketNOSERO1611.50
500nF/2000VGrey metal case, 4.5 x 2.5 cm square, 5.9 cm high, pictureNOSPotter1312.00
500nF/2500VGrey metal case, CP70E1FK504K1 mil codes, 3.0 x 6.3 cm square, 8.7 cm highNOSSangamo312.00
500nF/2500VGrey metal case, CP72E1EK504K1 mil codes, 3.0 x 6.3 cm square, 8.7 cm high. In original caseNOSSangamo
Picture
313.50
500nF/3000VGrey metal case, CP70E1EL504K1 mil codes. 6.0 x 3.0 cm square, 12.0 cm highNOSSangamo1812.50
500nF/6000VGrey metal case, big ceramic connections, CP70D1EP504K1 mil codes. 11.5 x 9.3 cm square, 12.0 cm highNOSSangamo518.50
500+500nF/400VMetal case, house is ground, great for tuning speaker XO's. 3.3 x 1.7 cm square, 4.7 cm highNOSCRV156.50
520nF/300VAxial, glas sealed capacitor, 1.7 cm diameter, 4.8 cm longNOSWest-Cap511.50
680nF/400VAxial, Steel housing, 118P68494S4 codes, 1.6 cm diameter, 5.0 cm longNOSSprague414.75
750nF/1000VGrey metal case, screw connections, including mounting brackets, 4.5 x 2.5 cm square, 5.0 cm highNOSCornell-Dubilier512.00
800nF/600VGrey metal case, including mounting brackets, 3.3 x 1.7 cm square, 5.0 cm highNOSCBV
Picture
1012.00
820nF/400VAxial, metal housing, glass sealed, XHFS27171-10 codes, 2.6 cm diameter, 5.5 cm longNOSGudeman414.50
820nF/400VAxial, metal housing, glass sealed, 118P82494S4 mil codes, 1.9 cm diameter, 4.8 cm long, PictureNOSSprague816.50

1uF/100VMetal case with mounting eye, axial, 1.8 cm diameter, 4.1 cm long, very good coupling caps for transistor applicationsNOSSprague
Picture
76.20
1uF/250VMetal case, screwholes for easy mounting at bottom, MP, J/S B25214-J2105-K000, 2.0 cm x 3.0 cm square, 3.6 cm highNOSSiemens76.90
1uF/400VMetal cased, very nice for coupling caps. 3.3 x 1.7 cm square, 4.6 cm high. CRV 48595-A-10 720555-52 militairy codes. Some have mounting brackets (Brk), some notNOS (Brk)
NOS
CRV8
13
13.50
11.50
1uF/400VAxial, metal housing, very little dents, but in perfect working condition, 2.6 cm diameter, 4.9 cm long. Glass sealed like Sprague Vitamin Q, CP04A1KE105K mil codesNOSPyramid8817.50
1uF/600VSquare metal case with mounting brackets, CP65B1FF105K mil codes, very good sound as output or coupling capacitor, 3.2 x 1.8 cm square, 6.3 cm highNOSAerovox
GE
C-D
9
4
3
12.50
1uF/600VSquare metal case, CP61B1EF105K mil codes, very good sound as output or coupling capacitor, 3.4 x 1.6 cm square, 7.0 cm highNOSC-D212.50
1uF/600VSquare metal case, CP91B1EF105K1 mil codes, very good sound as output or coupling capacitor, 3.4 x 1.6 cm square, 7.0 cm highNOSAerovox
Sangamo
GE
3
1
1
14.50
12.50
12.50
1uF/600VSquare metal case, very good sound as output or coupling capacitor, 4.5 x 2.6 cm square, 5.6 cm high, PictureNOSSangamo
Sprague
6
2
14.50
1uF/630VGrey metal case, screw mount on the top, MP, 2.5 cm diameter, 4.7 cm long, B2504-A6105-K000 codeNOSSiemens
Picture
328.50
1uF/1000VSquare grey metal housing, 4.3 cm x 2.4 cm square, 5.5 cm high, made in Canada, PictureNOSAerovox1214.50
1uF/1000VSquare grey metal housing, including mounting brackets, 5.0 cm x 2.6 cm square, 6.0 cm high, made in USA, PictureNOSGE816.50
1uF/2500V 70°
1700Vdc 100°
Metal case, Britsh made, 6.5 x 4.0 cm square, 12.0 cm highNOSDubilier214.50
1uF/5000VSquare grey metal housing, 12.5 cm x 9.5 cm square, 12.3 cm high, PictureNOSPlessey Visconol219.50
1.2uF/250VdcMetallised paper/plastic, yellow square housing, 1.2 x 1.8 cm square, 3.0 cm long, good sounding and cheap decoupling capsNOS???49110 for 8.00
1.5uF/200VAxial, metal housing, 1.4 cm diameter, 4.8 cm long. Glass sealed, CH09A1NC155K mil codes, great output- or coupling capacitor for transistor ampsNOSSprague
West-Cap
5
2
13.50
1.5uF/1000VAxial, glass sealed, 2.0 cm diameter, 6.7 cm long, 118P155910S4 mil codeNOSSprague119.50
1.5+4uF/1000VGreat capacitor for bypassing electrolytics in power supplies, 6.2 x 3.0 cm square, 11.3 cm high, PictureNOSCornell-Dubilier614.50
1.82uF/115VacMetal case, great output capacitor, small and very good sound, 4.3 x 2.5 cm square, 5.6 cm high, can handle 160 VdcNOSAerovox38.50
1+2+2uF/400VMetal case, three capactiors, one common, screw mountable, 9.5 cm x 3.1 cm square, 4.8 cm highNOSCornell-Dubilier1811.50
1+3+3+1uF/600VSquare metal case, great for tuning in speaker crossovers and power supplies, 9.3 x 6.2 cm square, 7.0 cm high, PictureNOSCornell Dubilier417.50
2uF/250Vmetal case, axial connections, very good for electrolytic decoupling in transistor amp power supply or other low voltage power supply application. They have some leakage, and do not really have exact value, mostly too high (ask me if you want me to match them), so not really suitable for high voltage decoupling. Very low price. 1.9 cm diameter, 6.2 cm longNOSDubilier

Picture (right)

683.75
2uF/250VMetal case, metallized paper, aluminium case including screw holes for mounting, B25224-J2205-K, 4.5 x 1.4 cm square, 5.3 cm highNOSSiemens164.50
2uF/250VacMetal plastic covered case, metallized paper, WZ159K,2.6 cm diameter, 6.8 cm longNOSErie488.50
2uF/400VSquare metal can, Z112880 codesNOSDubilier209.50
2uF/400VAxial, metal housing covered with plastic, 2.6 cm diameter, 4.8 cm long. Glass sealed like Sprague Vitamin Q, 118P20504T4 mil codes. Great for coupling or output capacitors in tube equipmentNOSSprague
Picture
12419.50
2uF/700VMetal case, great sound, 4.3 x 4.0 cm square, 5.0 cm highNOSMilitairy made813.50
2uF/2000VSquare green metal can, CP70E1FJ205K mil codes, 9.5 x 3.2 cm square, 11.2 cm high, in original packing, including mounting bracketsNOSBI Callenders212.50
2uF/2500VSquare grey metal can, 3F355TP mil code, 9.3 x 3.0 cm square, 9.8 cm high, PictureNOSCSI112.80
2.2uF/125VGrey square metal can, 10.4 x 4.4 cm square, 5.1 cm highNOSMilitairy made16.50
2.2uF/400VAxial, green coated metal housing, 2.4 cm diameter, 5.4 cm long. Glass sealed, K75-24 typeNOSRussian
Picture
49.50
4uF/200VMetal case, +/-5%. 4.6 x 1.5 cm square, 5.1 cm high, with mounting flaps welded at the bottomNOSRussian militairy made207.50
4uF/600VGrey metal case, CQ72E1FF405K mil code, 6.0 cm x 2.8 cm square, 9.7 cm highNOSChicago311.00
4uF/600VGrey metal case, 6.0 x 2.8 cm square, 8.9 cm high, PictureNOSSprague
CDE BQ
Sangamo
1
36
3
14.50
4uF/600VGrey metal case, 6.2 x 3.0 cm square, 8.8 cm high, PictureNOSAerovox
Cornell-dubilier
Westinghouse
12
4
10
14.50
4uF/600VGrey or Green metal case, CAW 48880-5 mil codes. 6.2 x 3.1 cm square, 11.8 cm high, mounting brackets attachedNOSCornell Dubilier
???
4
23
14.50
12.50
4uF/4000VdcLarge square grey metal housing, 11.4 cm x 9.4 cm square, 21.5 cm high, CP70E1DM405X mil codeNOSPyramid
Picture
124.50
4+4uF/600VdcSquare metal case, great for power supplies, 5.5 x 6.0 cm square, 7.8 cm high, PictureNOSC-D (original case)
C-D (little scratches)
???
6
9
4
18.50
14.50
14.50
4.7uF/50VAxial, Steel housing, glass sealed, CH09A1RA475K mil codes, 1.5 cm diameter, 4.8 cm long, great coupling- or output capacitor for transistor amplifiers, or speaker filtersNOSWest-Cap512.50
4.7uF/630V6.0 cm x 4.4 cm square, 8.6 cm highNOSSic-Safco18.50
5uF/380VacMetal halfround can, 4.0 cm x 2.5 cm square, 12.5 cm long, little corrosion near the contacts, metallised paper, pictureNOSCEDEC18.50
6uF/150VAxial capacitor, MP, W49/1 B551Y, 2.5 cm diameter, 6.2 cm long, great capacitor for speaker crossover modificationsNOSErie
Picture
69.50
6uF/1500VdcLarge square metal case, great for power supplies, 7.5 x 6.4 cm square, 11.8 cm high. CAY-48731 mil codes, with attached mounting bracket, PictureNOSWestinghouse114.50
6.7uF/250VacMP, rounded square metal case, great for speaker filters (replaces also 6.8uF) and power supplies, 4.3 x 2.6 cm square, 8.6 cm high.NOSPhilips
Picture
1209.50
8uF/600VMetal housing, S-1346527-A codes, some in original militairy packing, 3.3 cm x 9.3 cm square, 10.0 cm highNOSWestinghouse119.50

10uF/200VLarge metal case (Probably real paper oil, lot of paper), +/-20%. 6.5 x 3.4 cm square, 10.6 cm highNOSRussian militairy made312.50
10uF/370VacRounded square metal case, 5.2 x 3.2 cm square, 12.1 cm high. Used in a experiment for low hoursUSEDCDE812.50
12uF/150VAxial, metal housing, 2.6 cm diameter, 4.8 cm long. Glass sealed like Sprague Vitamin Q, 116P12691R5S2 mil codes. Great for speaker filters, coupling or output capacitors in transistor equipment, or paralleled for ultimate cathode decouplingNOSSprague8022.50
16uF/150VdcMP, great for speaker crossovers, used for an experiment, but only for 10 hours orso, so all very new. WP247k codes. 3.6 cm diameter, 8.5 cm highNOSErie17.50
20uF/400VRed metal case including mounting brackets. 6.0 cm x 4.5 cm square, 5.0 cm high, NOS Russian quality, no new productionNOSRussian
Picture
5612.50
20uF/370VacRounded square metal case. 7.1 cm x 4.6 cm square, 11.6 cm high, Di-electrol. Used in test for about 100 hours, very good conditionNOSGE116.50
20uF/440VacDielektrol capacitors. Large round metal case, 4.5 cm diameter, 9.7 cm high, very good sounding capacitors. No PCB's.NOSGE
Picture (alike)
121.50
25uF/370VacMilitary capacitors. Large round metal case, 4.5 cm diameter, 9.7 cm high, very good sounding capacitors. No PCB's. Used only very few hours (test)USEDAerovox
Picture
319.50
30uF/160VRussian paper/oil capacitor. Great for speaker crossovers and low voltage (eg transistor) power supplies. Including mounting tags. 4.0 x 4.5 cm square, 5.0 cm highNOSRussian
Picture
389.50
100uF/370VacVery good MP audio supply or speaker crossover capacitors. Made by ASC Shizuki Japan, not the cheaper and worse new production. Type X386S. Sealed metal/oil can, with four way connections. Suitable for use upto 500Vdc. 6.4 cm diameter, 11.9 cm highNOSASC Shizuki
Picture
2828.50
100uF/550VacEnourmeous power supply capacitors. We do not know the exact dielectricum (PIO or MKP?), but very suitable for tube power supplies. Pulls from unused UPS. Screw connections, 7.5 cm diameter, 27.5 cm highNEWComar
Picture
1228.50