KOPA ELECTRÓNICA

Technology according to European norm.
Professional quality manufacture. Materials of first quality are used.Kopa Electrónica manufactures wirewound Potentiometers / wirewound rheostats from 1950.
The wirewound potentiometers or rheostatsare made with a steatite hoop of great hardness,antihygroscopic, being avoid the effects ofcorrosion by electrolysis between winding turns. The type of thread used for the winding isconstantan ferro or nikron, based on the resistive value.
The potentiometers are covered with a barnizTo guarantee its linearity, it avoids the turnsmove by the expansion of the thread.
Materials of first quality are used, resin fenol ica, polyamides, ultra ceramic steatite, nylon 6/6 30%, fiber glass.
All the plastics used are technicians UL 94V-0 category.
Standard linearity.
Upon request logarithmic available.
Brass plated terminals.
Standardized plug-in Terminal connections.
In tandem available(doubles).

Series	Version	Power rating W	Diámeter mm	Hight mm	Terminal mm	Spindle length mm	Spindle Material	W. grs	PDF
P3017xxx4W	Simple	4	30	20	2.8	11	Plastic	17
P3017Dxxx4W	Double	4	30	41.3	2.8	11	Plastic	28
P4222xxx6W	Simple	6	40	23.6	2.8	11	Plastic	36
P4222Dxxx6W	Double	6	40	49	2.8	11	Plastic	54
P115Wxxx	Simple	15	32	27	4	10	Metallic	40
P125Wxxx	Simple	25	45	35	6.3	38.5	Metallic	90
P150Wxxx	Simple	50	65	42	6.3	36	Metallic	160
P180Wxxx	Simple	80	73	43	6.3	37	Metallic	209
P1125Wxxx	Simple	125	87	62	6.3	17	Metallic	340

Specials wirewound potentiometers for sound

products

Series	Version	Power rating W	Diámeter mm	Hight mm	Terminal mm	Spindle length mm	Spindle Material	W. grs	PDF
P3017xxx4W	Simple	4	30	20	2.8	11	Plastic	17
P3017xxx4W-P0	Simple / PO	4	30	20	2.8	11	Plastic	17
P3017Dxxx4W	Double	4	30	41.3	2.8	11	Plastic	28
P3017Dxxx4WP0	Double / PO	4	30	41.3	2.8	11	Plastic	28
P3017xxx12W	Simple	12	30	20	2.8	11	Plastic	17
P3017xxx12W-P0	Simple / PO	12	30	20	2.8	11	Plastic	17
P3017Dxxx12W	Double	12	30	41.3	2.8	11	Plastic	28
P3017Dxxx12WP0	Double / PO	12	30	41.3	2.8	11	Plastic	28
P4222xxx6W	Simple	6	40	23.6	2.8	11	Plastic	36
P4222xxx6WP0	Simple / PO	6	40	23.6	2.8	11	Plastic	36
P4222Dxxx6W	Double	6	40	49	2.8	11	Plastic	54
P4222Dxxx6WP0	Double / PO	6	40	49	2.8	11	Plastic	54
P4222xxx18W	Simple	18	40	23.6	2.8	11	Plastic	36
P4222xxx18WP0	Simple / PO	18	40	23.6	2.8	11	Plastic	36
P4222Dxxx18W	Double	18	40	49	2.8	11	Plastic	54
P4222Dxxx18WP0	Double / PO	18	40	49	2.8	11	Plastic	54
P-145Wxxx	Simple	45	32	27	4	10	Metallic	40
P-175Wxxx	Simple	75	45	35	6.3	38.5	Metallic	90
P-1150Wxxx	Simple	150	65	42	6.3	36	Metallic	160
P-1240Wxxx	Simple	240	73	43	6.3	37	Metallic	209
P-1375Wxxx	Simple	375	87	62	6.3	17	Metallic	340

Standard rated resistances from 8 to 10K. Special rated resistances upon request.

8	10	15	22	27	33	47	68	82
	100	150	220	270	330	470	680	820
	1k	1k5	2k2	2k7	3k3	4k7	6k8	8k2	10k

Spindles
Spindles diameter Ø 6mm.
Plastic spindles are made of polyamide UL 94V0.
Metallic spindles are made in bi-chrome steel.

Smoth spindle for control knobs with screw.

Teethed spindle for a fast insertion on control knobs without need to mill the spindle or to have to tighten the screw.

Application notes Wirewound for sound

Attenuators of volum level, used to control the volume of the loudspeaker untill the maximum of attenuation, almost zero.

Attenuators of volum leve with infinite attenuation (P0), used to control the volume of the loudspeaker to infinite attenuation (total disconnection), ideal for bedrooms where interests nothing is heard at night, total silence.

For 4Ω loudspeakers it is recommended to use 27Ω potentiometer.
For 8Ω loudspeakers it is recommended to use 47Ω potentiometer.
The potentiometer power rating has to be equal to the audio input, independently to the number of loudspeakers that it controls.
Visual situation in the potentiometer 1 and 2 external terminals 3= central Terminal.

Loudspeakers balances

Loudspeakers balances, used to attenuate the volume between two loudspeakers of a same output, being able to attenuate Esther ofboth loudspeakers.
Example. 1 Loudspeaker in the flat roof and the other in the dinning room, we can attenuate the volume of one loudspeaker to theminimum but always is a loudspeaker with volume.

For 4Ω loudspeakers it is recommended to use 27Ω potentiometer.
For 8Ω loudspeakers it is recommended to use 47Ω potentiometer.
Visual situation in the potentiometer 1 and 2 external terminals 3= central Terminal.

8	10	15	22	27	33	47	68	82
	100	150	220	270	330	470	680	820
	1k	1k5	2k2	2k7	3k3	4k7	6k8	8k2	10k

8	10	15	22	27	33	47	68	82
	100	150	220	270	330	470	680	820
	1k	1k5	2k2	2k7	3k3	4k7	6k8	8k2	10k

8	10	15	22	27	33	47	68	82
	100	150	220	270	330	470	680	820
	1k	1k5	2k2	2k7	3k3	4k7	6k8	8k2	10k