The power amplifier tube is a key component in the audio power amplifier. Now compare the genuine and fake products.
1. From the printed fonts: the authentic fonts are well-proportioned and the writing is not easy to be wiped off, and the fake fonts are like the ones written on them. The gentle rubbing with the fingernails will make the writing color lighter and even the paint can't be seen clearly.
2. From the branding of the package press: English letters and numbers are printed on both sides of the solid screw hole near the upper part of the tube, and the lettering of different manufacturers or countries is printed in the middle of the lower part near the pin, such as SK (Sanken) , PHILIPPINES (Philippines), MALAYSIA (Malaysia), etc. The fakes are not printed, or the above two points are ugly and ugly, and the following points are not printed because of the word position. Of course, there are also some joint ventures that are not printed here, but there are no significant differences between them and the original tubes.
3. From the perspective of the packaging and processing technology of the power amplifier tube: the boundary between the heat sink and the package plastic of the genuine product is clear and the corner is flat, and the boundary of the bond of the fake product is unclear or even has a gap (the market is the easiest). See the fake products are small Toshiba tubes A1491/C5198, D817/D1047), the surface is as rough as the brushed treatment (this is the place where the fake is the most easy to reveal stuffing). Some models of imported tubes have a matte surface treated with a matte finish (such as MATALOLA's MJL1302A/MJL3281A), while fake and individual joint venture tubes do not have this process.
4. From the measurement results: when using the pointer multimeter R × 10k to block the positive and negative resistance between the c and e poles of the tube, the pointer of the genuine one is not moving or the angle of the swing is very small, and the fake c , e-pole forward resistance (NPN forward is Rce, PNP forward is Rec), the swing angle is much larger, that is, the resistance value is smaller (this indicates that the tube has a large penetration current); and the tube is measured with a digital multimeter. When the magnification is β, the consistency of genuine (especially imported tubes) is very good, and the consistency of fakes is generally poor.
5. Performance when the fake machine is installed: Since the pressure resistance of the pipe is generally low, it is easy to cause the pipe to burn when it is turned on; or the heat is more serious than the genuine one. At this time, the c and e pole resistance of the pipe is much smaller than when the machine is not installed. And the deviation of β is even larger, but there is no such phenomenon in genuine. The power amplifier tube is a key component in the audio power amplifier. Now compare the genuine and fake products.
1. From the printed fonts: the authentic fonts are well-proportioned and the writing is not easy to be wiped off, and the fake fonts are like the ones written on them. The gentle rubbing with the fingernails will make the writing color lighter and even the paint can't be seen clearly.
2. From the branding of the package press: English letters and numbers are printed on both sides of the solid screw hole near the upper part of the tube, and the lettering of different manufacturers or countries is printed in the middle of the lower part near the pin, such as SK (Sanken) , PHILIPPINES (Philippines), MALAYSIA (Malaysia), etc. The fakes are not printed, or the above two points are ugly and ugly, and the following points are not printed because of the word position. Of course, there are also some joint ventures that are not printed here, but there are no significant differences between them and the original tubes.
3. From the perspective of the packaging and processing technology of the power amplifier tube: the boundary between the heat sink and the package plastic of the genuine product is clear and the corner is flat, and the boundary of the bond of the fake product is unclear or even has a gap (the market is the easiest). See the fake products are small Toshiba tubes A1491/C5198, D817/D1047), the surface is as rough as the brushed treatment (this is the place where the fake is the most easy to reveal stuffing). Some models of imported tubes have a matte surface treated with a matte finish (such as MATALOLA's MJL1302A/MJL3281A), while fake and individual joint venture tubes do not have this process.
4. From the measurement results: when using the pointer multimeter R × 10k to block the positive and negative resistance between the c and e poles of the tube, the pointer of the genuine one is not moving or the angle of the swing is very small, and the fake c , e-pole forward resistance (NPN forward is Rce, PNP forward is Rec), the swing angle is much larger, that is, the resistance value is smaller (this indicates that the tube has a large penetration current); and the tube is measured with a digital multimeter. When the magnification is β, the consistency of genuine (especially imported tubes) is very good, and the consistency of fakes is generally poor.
5. Performance when the fake machine is installed: Since the pressure resistance of the pipe is generally low, it is easy to cause the pipe to burn when it is turned on; or the heat is more serious than the genuine one. At this time, the c and e pole resistance of the pipe is much smaller than when the machine is not installed. And the deviation of β is even larger, but there is no such phenomenon in genuine. The power amplifier tube is a key component in the audio power amplifier. Now compare the genuine and fake products.
1. From the printed fonts: the authentic fonts are well-proportioned and the writing is not easy to be wiped off, and the fake fonts are like the ones written on them. The gentle rubbing with the fingernails will make the writing color lighter and even the paint can't be seen clearly.
2. From the branding of the package press: English letters and numbers are printed on both sides of the solid screw hole near the upper part of the tube, and the lettering of different manufacturers or countries is printed in the middle of the lower part near the pin, such as SK (Sanken) , PHILIPPINES (Philippines), MALAYSIA (Malaysia), etc. The fakes are not printed, or the above two points are ugly and ugly, and the following points are not printed because of the word position. Of course, there are also some joint ventures that are not printed here, but there are no significant differences between them and the original tubes.
3. From the perspective of the packaging and processing technology of the power amplifier tube: the boundary between the heat sink and the package plastic of the genuine product is clear and the corner is flat, and the boundary of the bond of the fake product is unclear or even has a gap (the market is the easiest). See the fake products are small Toshiba tubes A1491/C5198, D817/D1047), the surface is as rough as the brushed treatment (this is the place where the fake is the most easy to reveal stuffing). Some models of imported tubes have a matte surface treated with a matte finish (such as MATALOLA's MJL1302A/MJL3281A), while fake and individual joint venture tubes do not have this process.
4. From the measurement results: when using the pointer multimeter R × 10k to block the positive and negative resistance between the c and e poles of the tube, the pointer of the genuine one is not moving or the angle of the swing is very small, and the fake c , e-pole forward resistance (NPN forward is Rce, PNP forward is Rec), the swing angle is much larger, that is, the resistance value is smaller (this indicates that the tube has a large penetration current); and the tube is measured with a digital multimeter. When the magnification is β, the consistency of genuine (especially imported tubes) is very good, and the consistency of fakes is generally poor.
5. Performance when the fake machine is installed: Since the pressure resistance of the pipe is generally low, it is easy to cause the pipe to burn when it is turned on; or the heat is more serious than the genuine one. At this time, the c and e pole resistance of the pipe is much smaller than when the machine is not installed. And the deviation of β is even larger, but there is no such phenomenon in genuine.
1. From the printed fonts: the authentic fonts are well-proportioned and the writing is not easy to be wiped off, and the fake fonts are like the ones written on them. The gentle rubbing with the fingernails will make the writing color lighter and even the paint can't be seen clearly.
2. From the branding of the package press: English letters and numbers are printed on both sides of the solid screw hole near the upper part of the tube, and the lettering of different manufacturers or countries is printed in the middle of the lower part near the pin, such as SK (Sanken) , PHILIPPINES (Philippines), MALAYSIA (Malaysia), etc. The fakes are not printed, or the above two points are ugly and ugly, and the following points are not printed because of the word position. Of course, there are also some joint ventures that are not printed here, but there are no significant differences between them and the original tubes.
3. From the perspective of the packaging and processing technology of the power amplifier tube: the boundary between the heat sink and the package plastic of the genuine product is clear and the corner is flat, and the boundary of the bond of the fake product is unclear or even has a gap (the market is the easiest). See the fake products are small Toshiba tubes A1491/C5198, D817/D1047), the surface is as rough as the brushed treatment (this is the place where the fake is the most easy to reveal stuffing). Some models of imported tubes have a matte surface treated with a matte finish (such as MATALOLA's MJL1302A/MJL3281A), while fake and individual joint venture tubes do not have this process.
4. From the measurement results: when using the pointer multimeter R × 10k to block the positive and negative resistance between the c and e poles of the tube, the pointer of the genuine one is not moving or the angle of the swing is very small, and the fake c , e-pole forward resistance (NPN forward is Rce, PNP forward is Rec), the swing angle is much larger, that is, the resistance value is smaller (this indicates that the tube has a large penetration current); and the tube is measured with a digital multimeter. When the magnification is β, the consistency of genuine (especially imported tubes) is very good, and the consistency of fakes is generally poor.
5. Performance when the fake machine is installed: Since the pressure resistance of the pipe is generally low, it is easy to cause the pipe to burn when it is turned on; or the heat is more serious than the genuine one. At this time, the c and e pole resistance of the pipe is much smaller than when the machine is not installed. And the deviation of β is even larger, but there is no such phenomenon in genuine. The power amplifier tube is a key component in the audio power amplifier. Now compare the genuine and fake products.
1. From the printed fonts: the authentic fonts are well-proportioned and the writing is not easy to be wiped off, and the fake fonts are like the ones written on them. The gentle rubbing with the fingernails will make the writing color lighter and even the paint can't be seen clearly.
2. From the branding of the package press: English letters and numbers are printed on both sides of the solid screw hole near the upper part of the tube, and the lettering of different manufacturers or countries is printed in the middle of the lower part near the pin, such as SK (Sanken) , PHILIPPINES (Philippines), MALAYSIA (Malaysia), etc. The fakes are not printed, or the above two points are ugly and ugly, and the following points are not printed because of the word position. Of course, there are also some joint ventures that are not printed here, but there are no significant differences between them and the original tubes.
3. From the perspective of the packaging and processing technology of the power amplifier tube: the boundary between the heat sink and the package plastic of the genuine product is clear and the corner is flat, and the boundary of the bond of the fake product is unclear or even has a gap (the market is the easiest). See the fake products are small Toshiba tubes A1491/C5198, D817/D1047), the surface is as rough as the brushed treatment (this is the place where the fake is the most easy to reveal stuffing). Some models of imported tubes have a matte surface treated with a matte finish (such as MATALOLA's MJL1302A/MJL3281A), while fake and individual joint venture tubes do not have this process.
4. From the measurement results: when using the pointer multimeter R × 10k to block the positive and negative resistance between the c and e poles of the tube, the pointer of the genuine one is not moving or the angle of the swing is very small, and the fake c , e-pole forward resistance (NPN forward is Rce, PNP forward is Rec), the swing angle is much larger, that is, the resistance value is smaller (this indicates that the tube has a large penetration current); and the tube is measured with a digital multimeter. When the magnification is β, the consistency of genuine (especially imported tubes) is very good, and the consistency of fakes is generally poor.
5. Performance when the fake machine is installed: Since the pressure resistance of the pipe is generally low, it is easy to cause the pipe to burn when it is turned on; or the heat is more serious than the genuine one. At this time, the c and e pole resistance of the pipe is much smaller than when the machine is not installed. And the deviation of β is even larger, but there is no such phenomenon in genuine. The power amplifier tube is a key component in the audio power amplifier. Now compare the genuine and fake products.
1. From the printed fonts: the authentic fonts are well-proportioned and the writing is not easy to be wiped off, and the fake fonts are like the ones written on them. The gentle rubbing with the fingernails will make the writing color lighter and even the paint can't be seen clearly.
2. From the branding of the package press: English letters and numbers are printed on both sides of the solid screw hole near the upper part of the tube, and the lettering of different manufacturers or countries is printed in the middle of the lower part near the pin, such as SK (Sanken) , PHILIPPINES (Philippines), MALAYSIA (Malaysia), etc. The fakes are not printed, or the above two points are ugly and ugly, and the following points are not printed because of the word position. Of course, there are also some joint ventures that are not printed here, but there are no significant differences between them and the original tubes.
3. From the perspective of the packaging and processing technology of the power amplifier tube: the boundary between the heat sink and the package plastic of the genuine product is clear and the corner is flat, and the boundary of the bond of the fake product is unclear or even has a gap (the market is the easiest). See the fake products are small Toshiba tubes A1491/C5198, D817/D1047), the surface is as rough as the brushed treatment (this is the place where the fake is the most easy to reveal stuffing). Some models of imported tubes have a matte surface treated with a matte finish (such as MATALOLA's MJL1302A/MJL3281A), while fake and individual joint venture tubes do not have this process.
4. From the measurement results: when using the pointer multimeter R × 10k to block the positive and negative resistance between the c and e poles of the tube, the pointer of the genuine one is not moving or the angle of the swing is very small, and the fake c , e-pole forward resistance (NPN forward is Rce, PNP forward is Rec), the swing angle is much larger, that is, the resistance value is smaller (this indicates that the tube has a large penetration current); and the tube is measured with a digital multimeter. When the magnification is β, the consistency of genuine (especially imported tubes) is very good, and the consistency of fakes is generally poor.
5. Performance when the fake machine is installed: Since the pressure resistance of the pipe is generally low, it is easy to cause the pipe to burn when it is turned on; or the heat is more serious than the genuine one. At this time, the c and e pole resistance of the pipe is much smaller than when the machine is not installed. And the deviation of β is even larger, but there is no such phenomenon in genuine.
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