{"id":441,"date":"2020-03-04T23:25:03","date_gmt":"2020-03-04T20:25:03","guid":{"rendered":"https:\/\/tomorrow82.ru\/?page_id=441"},"modified":"2020-03-04T23:25:03","modified_gmt":"2020-03-04T20:25:03","slug":"parts-list-for-one-channel","status":"publish","type":"page","link":"https:\/\/tomorrow82.ru\/?page_id=441","title":{"rendered":"Parts List for One Channel"},"content":{"rendered":"\n

Version 4.4\/4.5 of the Amplifier<\/strong><\/p>\n\n\n\n

Transistors<\/strong> (Starred types are preferred.)<\/p>\n\n\n\n

I tend to prefer Motorola if available. Motorola has spun off its \nsemiconductor division, and it is now called On Semiconductor. In the \nprocess, they have discontinued many products. I have seen some mystery \nbrand transistors that have really bad characteristics. If the \ntransistor is labeled with a name brand manufacturer, it should give no \nproblems. For Q1 — Q11, the first NPN type should be used if the first \nPNP type is used, etc. This also applies to Q16 — Q17 and to Q18 — Q21. I\n have seen students use all of the types of transistors that I have \nlisted below with no problems. If you look at the specs, however, you \nwill see why I prefer the starred types. Transistors can be substituted,\n provided the substitutes have similar specs to the ones below.<\/p>\n\n\n\n

I have been told that the MPS8099\/MPS8599 are no longer a \n«complementary» pair because the PNP is discontinued. ON Semiconductor \nstates that the direct replacement for the MPS8599 is a MPSA56. In March\n 2003, I was told that the MPS8599 is back. ON Semiconductor is now \nsupplying them.<\/p>\n\n\n\n

Other possibilities for the MPS8099\/MPS8599 are the ZTX651\/ZTX751 which are available from Digi-Key.<\/p>\n\n\n\n

Q1, Q2, Q5, Q7, Q9, Q10<\/td>BVCEO<\/sub><\/td>IC(max)<\/sub><\/td>PD(max)<\/sub> at 25o<\/sup> C ambient<\/td>hFE(min)<\/sub><\/td>fT(min)<\/sub><\/td><\/tr>
MPS8099*<\/td>80 V<\/td>0.2 A<\/td>350 mW<\/td>100<\/td>150 MHz<\/td><\/tr>
MPS8098<\/td>60 V<\/td>0.2 A<\/td>350 mW<\/td>100<\/td>150 MHz<\/td><\/tr>
MPSA06<\/td>80 V<\/td>0.5 A<\/td>300 mW<\/td>50<\/td>50 MHz<\/td><\/tr>
MPSA05<\/td>60 V<\/td>0.5 A<\/td>300 mW<\/td>50<\/td>50 MHz<\/td><\/tr>
2N5210<\/td>50 V<\/td>0.05 A<\/td>310 mW<\/td>200<\/td>30 MHz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Q3, Q4, Q6, Q8, Q11<\/td>BVCEO<\/sub><\/td>IC(max)<\/sub><\/td>PD(max)<\/sub> at 25o<\/sup> C ambient<\/td>hFE(min)<\/sub><\/td>fT(min)<\/sub><\/td><\/tr>
MPS8599*<\/td>80 V<\/td>0.2 A<\/td>350 mW<\/td>100<\/td>150 MHz<\/td><\/tr>
MPS8598<\/td>60 V<\/td>0.2 A<\/td>350 mW<\/td>100<\/td>150 MHz<\/td><\/tr>
MPSA56<\/td>80 V<\/td>0.5 A<\/td>300 mW<\/td>50<\/td>50 MHz<\/td><\/tr>
MPSA55<\/td>60 V<\/td>0.5 A<\/td>300 mW<\/td>50<\/td>50 MHz<\/td><\/tr>
2N5087<\/td>50 V<\/td>0.05 A<\/td>310 mW<\/td>200<\/td>30 MHz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Q13, Q14<\/td>BVCEO<\/sub><\/td>IC(max)<\/sub><\/td>PD(max)<\/sub> at 25o<\/sup> C ambient<\/td>hFE(min)<\/sub><\/td>fT(min)<\/sub><\/td><\/tr>
2N3439*<\/td>350 V<\/td>1 A<\/td>1 W<\/td>40<\/td>15 MHz<\/td><\/tr>
2N3440<\/td>250 V<\/td>1 A<\/td>1 W<\/td>40<\/td>15 MHz<\/td><\/tr>
NTE396<\/td>350 V<\/td>1 A<\/td>1 W<\/td>30<\/td>15 MHz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Q12, Q15<\/td>BVCEO<\/sub><\/td>IC(max)<\/sub><\/td>PD(max)<\/sub> at 25o<\/sup> C ambient<\/td>hFE(min)<\/sub><\/td>fT(min)<\/sub><\/td><\/tr>
2N5415<\/td>200 V<\/td>1 A<\/td>1 W<\/td>30<\/td>15 MHz<\/td><\/tr>
2N5416*<\/td>300 V<\/td>1 A<\/td>1 W<\/td>30<\/td>15 MHz<\/td><\/tr>
NTE397<\/td>350 V<\/td>1 A<\/td>10 W<\/td>30<\/td>?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

I have not tried the NTE396 and NTE397 transistors. They are \nspecified to be a complementary pair. The spec sheet for the NTE396 has \ntwo power ratings — 1 W and 5 W. It is not clear why they specify two. \nThe spec sheet for the NTE397 only has one power rating and it does not \ngive the gain bandwidth product fT<\/sub>.<\/p>\n\n\n\n

Q16<\/td>BVCEO<\/sub><\/td>IC(max)<\/sub><\/td>PD(max)<\/sub> with case at 25o<\/sup> C<\/td>hFE(min)<\/sub><\/td>fT(min)<\/sub><\/td><\/tr>
MJE15030*<\/td>150 V<\/td>8 A<\/td>50 W<\/td>20<\/td>30 MHz<\/td><\/tr>
2N6474<\/td>120 V<\/td>4 A<\/td>40 W<\/td>15<\/td>4 MHz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Q17<\/td>BVCEO<\/sub><\/td>IC(max)<\/sub><\/td>PD(max)<\/sub> with case at 25o<\/sup> C<\/td>hFE(min)<\/sub><\/td>fT(min)<\/sub><\/td><\/tr>
MJE15031*<\/td>150 V<\/td>8 A<\/td>50 W<\/td>20<\/td>30 MHz<\/td><\/tr>
2N6476<\/td>120 V<\/td>4 A<\/td>40 W<\/td>15<\/td>4 MHz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Q18, Q20<\/td>BVCEO<\/sub><\/td>IC(max)<\/sub><\/td>PD(max)<\/sub> with case at 25o<\/sup> C<\/td>hFE(min)<\/sub><\/td>fT(min)<\/sub><\/td><\/tr>
MJ15003*<\/td>140 V<\/td>20 A<\/td>250 W<\/td>25<\/td>2 MHz<\/td><\/tr>
MJ15001<\/td>140 V<\/td>15 A<\/td>200 W<\/td>25<\/td>2 MHz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Q19, Q21<\/td>BVCEO<\/sub><\/td>IC(max)<\/sub><\/td>PD(max)<\/sub> with case at 25o<\/sup> C<\/td>hFE(min)<\/sub><\/td>fT(min)<\/sub><\/td><\/tr>
MJ15004*<\/td>140 V<\/td>20 A<\/td>250 W<\/td>25<\/td>2 MHz<\/td><\/tr>
MJ15002<\/td>140 V<\/td>15 A<\/td>200 W<\/td>25<\/td>2 MHz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Do not use plastic insulating caps over Q18 through Q21. These will \nkeep the screws that hold the power transistors to their sockets from \nmaking contact to the transistor cases. The case is the collector and \nthere will be no power supply voltage on the collectors. I had a student\n use these caps, and R41 through R44 caught on fire on his board, and he\n blew Q16 and Q17.<\/p>\n\n\n\n

Apparently the 2N3439\/2N3440 and 2N5415\/2N5416 transistors are \ngetting difficult to find. A possible manufacturer who has them listed \non its web page is STMicroelectronics<\/a>. The STMicroelectronics transistors are available from Arrow Electronics<\/a> and Mouser Electronics<\/a>.\n I would be interested if anyone knows of other sources for these \ntransistors. I have been told that ON Semiconductor no longer makes \nthese and transistors with the ON Semiconductor label may be \ncounterfeit. The transistors are currently made by ST Microelectronics \nand Central Semiconductor.<\/p>\n\n\n\n

As of June 2000, RadioShack.com<\/a> has all of the transistors at good prices. They can be ordered through the web. You can see a list of their part numbers and prices. In spring 2002, students told me that RadioShack.com was selling its inventory at steep discounts and would soon be out of business. Formerly Tech America, this is the parts division of Radio Shack and is not connected with the retail stores.<\/p>\n\n\n\n

The 2N3439\/2N5415 pair is the one that I originally used for my \nprototype amplifiers. It is the complementary TO-5\/TO-39 case pair \nrecommended in the RCA Power Transistor Manual for audio amplifiers. For\n all practical purposes, the 2N3440 and 2N5416, respectively, are \nequivalent to the 2N3439 and the 2N5415 for the Low TIM amplifier.<\/p>\n\n\n\n

Q12 — Q15 can run a little warm. I have never had problems with these\n running too hot. With the Version 4.4\/4.5 amp, I have reduced the bias \ncurrents in these transistors just a little to keep them cooler. \nAlthough I don’t think they are needed, you can put TO-5 clip-on heat \nsinks on them. There is not much room on the circuit board for the heat \nsinks, so they must have small fins. Another type of heat sink which \nwill fit is in the shape of a flag (about 1 inch high by 3\/4 inch wide) \nwith rounded clips on one end that clip around the transistor. If you \ncan’t find them, they are easy to make from sheet metal flashing. The \nclips should make good mechanical contact to the transistor for good \nheat conduction.<\/p>\n\n\n\n

Diodes<\/strong><\/p>\n\n\n\n