F5 Turbo Assembly Instruction v3
Contents
1. FET Audio 10 T d 5 2 1 0 5 0 2 A Yo 0 1 Grounded Input 0 05 0 02 0 01 0 005 BEE 2 Sgal 0 002 0 001 100m 200m 500m 1 2 5 10 20 50 100 WwW Sweep Trace Color Line Style Thick Data Axis Comment 1 1 Red Solid 1 Anlr THD N Ratio Left Float input lower noise 1 3 Magenta Solid 1 Anlr THD N Ratio Left 2 1 Green Solid 1 Anlr THD N Ratio Left Grounded input higher noise 2 3 Red Solid 1 Anlr THD N Ratio Left F5T thd vs pwr at27 6 5 4 3 2 1 REVISION RECORD ECO NO APPROVED DATE i voa ozz ofat LL q NL C R5 R25 m D 1k 10K i m m Q7 ENS 1 P a J1 2 2SC2240BL S SA R40 1000uf Q10 AV 15k 35V KSC2690AYS MUR3020W MUR3020W 32V A LED Ql ex S E 5k Screw 2SK170 N IRF9240 K 47R 09 IRF9240 IRF9240 D 220R3W R8 c C zn 3OR 220R3W Do not use J2 1 P3 INPUT N OUTPUT 1K pt C4 J2 2 J4 2 R2 200R Do not use 47k 220R3W z J5 1 R10 es i E J5 2 220R3W Q11 J17 1 a IRF240 di i J17 2 N SC 3 TH1 4k7 g 32V B Q8 2SA970BL R34 C12 C10 C2 c14 Q12 0 22u 0 22uf 1000 0 22uf J3 2 KSA1220AYS 1R3W 1R3W 1R3W MUR3020W MUR3020W 35V J3 1 R6 R26 a 1k 10K a COMPANY Screw Screw Screw Screw Screw V V V V A D ATED K ow CHECKED ATED2. Lv ogr en OE ot Lal Ce CH OSL ZZ PN gt ww0 8Z wwo gzi gt wuc oz wue oz OLL 26 PN OL amp sel CW Q FA OLL G v9c CH OSL 8ZE FA LD L 6vl SHIG TT Le d OW Z6L 26E HN Z6L 967 YN Z6L 007 vW ZEL FOL PN Z6L 8 PN Q e e wun pr wwo or al Wuer wwg yg gt ES wuu 96 uu 96 E uuQ z6l Se vugzg ww0 00p 7107 CC QC 11 220 ani d ici vnc nn7 nnscu qt O 8 26 YA O of ec PN OOL Z6E FN O OLL Cer EN O O Z6L C6 YW yidap wwg PN uidep uug CW O 8 967 YN O DC S v9z CN OG G p9z EW 0S gz mO 9 O GL 8 CN L 6L erg EWO asiyo o OOL SZ YA OOL G p9Z EN COZL G v9c ENO O GZL 8Z CH O EN S r9Z ENO OSL 8ZE FA i ian OLL S p9Z CN ei 962 PN O 8 002 PN O i wO og een CH Se ove CH POS Cen en o Ce oo enO O L 6L G GeL EN OO S SEL EN O COZI Cer N O nt o9 WO o Lvl OZ CN ent eet EN OLL S Sel CH O Z6L 007 PN Z6L HOL TN O O ZIN7 RC nh n 7l 907 yUIS DOH O OC g N O O OS ZL YN n 001 8 an O OLL 8 YN O Zel 8 YN O d ici vnc nn7 nnscu d 3700mil 1150mi 2750mil 3800mi
3. RES BODY 060 CENTERS 400 RES BODY 060 CENTERS 400 NIN RM10_1 4WR RM10_1 4WR R17 24 R31 34 1R3W China 1 MF RES BODY 060 CENTERS 400 RES BODY 060 CENTERS 400 BIN KA N RM10_1 4WR RM12_5_3WR R5 6 1k to 475R 220R3W Xicon China 1 MF RES BODY 060 CENTERS 400 RES BODY 060 CENTERS 400 N RM10_1 4WR RM12_5_3WR R29 30 2k2 to 1 21k 475R Xicon RES BODY 060 CENTERS 400 RES BODY 060 CENTERS 400 NIP RM10_1 4WR RM10_1 4WR R13 16 R35 36 47R to 49 9R 47k RES BODY 060 CENTERS 400 RES BODY 060 CENTERS 400 DIN RM10_1 4WR RM10_1 4WR 30 J6 J8 14 4k7 to 10k Do not use China RES BODY 060 CENTERS 400 M3 size N I RM10_1 4WR SCREWM3 31 P3 32 P1 2 200R 5k Bourns 3296W 1 Bourns 3296W 1 VARIABLE RESISTOR TOP ADJUST TYPE VARIABLE RESISTOR TOP ADJUST TYPE P 00 VRES TOP ADJ VRES TOP ADJ 2 4 6 18 20 22 24 26 28 33 PCB F5T Notes PCB F5T China PCB F5T 1 Use 1 2k for Toshiba power mosfet low Vgs improve thermal stability 2 4k7 to 10k 5096 Vcc will be on input jfets good for 22V supply 3 47R to 49 9R use 49 9R as alternative 4 R5 6 change to 475R improve bias tuning F5T BOM Cost BillOfMaterials 2 BIN PCB F5T page 1 of 1 CLC filtering CRC filtering Ripple atter rectifier 426mVpp Ripple after rectifier 340mVpp trigger on 1254 Ext Ext5 Lin
4. hole by about 1 5mm q Whenall the PCB screws are in position and tighten solder all the leads on top Do not forget to solder the leads of MUR3020W r Note that the thermistor should be mounted as below The leads must not touch any ground as it carries the ve or ve high voltages Use the shrink tube provided to insulate the leads F5 Turbo PCB User Manual Version 3 Page 5 s Check the Ve and Ve point for any short circuit to the ground with a multi meter Note that a ground plan is used in the PCB design with a narrow gap Thus extreme care must be taken care during soldering of any parts to prevent short circuit to the ground plane Due to the narrow gap the supply voltage of this PCB should not be more than 50V 4 Tuning procedures a Before power up adjust P1 and P2 to fully anti clockwise if P1 and P2 is same direction as P3 Pot You will hear a click sound upon reaching the end of the tuning This is a multi turn pot and thus you will need to adjust many turns b Check the resistance between the points show must be below 1 ohm if P1 and P2 are adjusted correctly c Connectthree DC meters at the locations shown F5 Turbo PCB User Manual Version 3 Page 6 Check DC offset during bias adjust d Check dc voltage across R20 or R19 fr ul d Power up the amplifier the output DC offset should be close to OV Voltage across R20 and R23 should also be OV If not power off the amplifier immedi
5. CODE SIZE DRAWING NO REV A A em QUALITY CONTROL DATED RELEASED DATED SCALE SHEET OF F5T BOM Cost Q8 Q12 2SA1145Y Do not use TOSHIBA Fairchild PNP Low Noise PNP Transistor PNP Driver Transistor TO 92D TO 2 8H1AB Q7 2SC2705Y Do not use TOSHIBA Fairchild NPN Low Noise NPN Transistor NPN Driver TRANSISTOR ejo TO 92D TO 2 8H1AB 2SJ74BL match 2SK170BL match TOSHIBA Toshiba P CHANNEL LOW NOISE JFET N CHANNEL LOW NOISE JFET TO 92D TO 92D 560uf 35V 5mm 220uf 35V 5mm Panasonic FC Panasonic FC ALUMINUM ELECTROLYTIC CAP ALUMINUM ELECTROLYTIC CAP NIH ECAP A 5MM ECAP A 5MM C5 6 C9 14 10 1C3 4 0 047uf 50V 5mm Do not use Panasonic ECQ V CDE RADIAL FILM CAPACITOR MKS Mica 470pF 500V o IN CK06 CK06 11 7 12 1 5 J17 2x1 pin Header with jumper Do not use China China GENERIC 2 PIN SIP HEADER 100 CENTERS GENERIC 2 PIN SIP HEADER 200 CENTERS SMM HIO SIP 2P CONN 2P5MM 13 Q5 6 011 14 Q3 4Q9 2SK1530 2SJ201 TOSHIBA TOSHIBA MOSFET N CHANN POWER 200V 1 8A MOSFET P CHAN 200V 1 8A wio TO 247_F4AB TO 247_F4AB 15 LED1 2 16 D1 5 D7 LED TH MUR3020W Green Vishay LIGHT EMITTING DIODE Switch Mode Power Rectifier N O LED TO 247_F4 17 J15J16 4 7k TH1 with shrink tube China Varistor negative temp 4k7 RES BODY 060 CENTERS 400 N O SIP 2P RM10_1 4WR
6. F5 Turbo PCB User Manual Version 3 Page 1 F5 Turbo V3 Assembly Instruction 1 Introduction This PCB is designed base on the Nelson Pass F5T V3 circuit Details please refer to the article posted by Nelson on First Watt website http www firstwatt com pdf art f5 turbo pdf The main difference between this version and Pass F5T V3 is that the PCB only use 3 pairs of power mosfet not 4 pairs The main reason is that this version PCB is 100 fit into the F4 PCB that I sold in 2007 Details http www fetaudio com archives 33 Thus this provide a fast upgrade from F4 into F5T without any modification of the heat sink 2 Circuit Diagram Since the PCB is layout by FETAudio and here is the circuit diagram for reference REVISION RECORD E ECONO remove Joes L omt azul obur D a ae D val ar e dLa 55 eg A 4 R32 p RAO 1000uf we d SS Sean eis 7 Sien 5 Lo ev Ka A LE Ka m x i x x C Le C tus x omis La wa D rotse lt exe i Dp D lo 3 ms me d D EN aR ma WR w ch A L THI dei ess B AL f Zi D D 3 17 en Pe en Du ms Oma d ar lao te la RR CA G t 0 22 Gong 0 22uf 332 us Cans nsn insu Raw Ze O S i corean me F4 POWER AMP us ei pom ds SE ria cope size DRAWING NO
7. Manual Version 3 Page 7 heat sink temperature stable re adjust down or up until the target bias is reached This will take about 1 hrs to stable temperature i Check through the voltage drop across all mosfet source resistors 1 ohm resistors to see how good the match is The voltage drop or bias should be within 10 across all the mosfets This is to ensure that all the mosfet is matched within a reasonable limit and share an almost equal load on the total bias j Note that the DC offset will drift from cold to hot and it is normal The target is that when hot the dc offset should be within 10mV relative to ground e The R5 and R6 are changed to 475R from 1k ohm This is to improve the tuning of bias to be less sensitivity In that case the output dc offset can be set to below 1mV easily Moreover the change will also improve the DC offset drift from cold to warm conditions to be within 10mV k Thus adjust the bias value according to the heat sink size used Target temperature of the heat sink should be below 50 degC If you do not have 3 meters then check the output DC offset and voltage across R20 think two meters is a minimum m For P3 pot adjustment refer to Pass s article for details F5 Turbo PCB User Manual Version 3 Page 8 5 Picture of a complete set F5 Turbo This set use Airlink 625VA 25Vx2 transformer Bridge rectifier 70000uF SOV Mallory 1mH solen coil 30000uF 100V Rifa long life The ripple a
8. REV z uox QUALITY CONTROL DATED RELEASED pom SALE SHEET OF Notes a The Q7 and Q8 is in TO 92 package I have also put TO 220 package pads in the PCB if the original transistors recommended by Nelson are used b J7isa pin header and it should be shorted to ground by a jumper for normal operation The X point is for those who want to modify the power amp into F5X mode F5 Turbo PCB User Manual Version 3 Page 2 c Since use Toshiba 2SK1530 and 2SJ201 power Mosfets have changed some values of resistors and thus please refer to the update BOM bill of material for details 3 Assembly Instruction a Solder the 4W resistors per BOM Note that a gap about 1mm should be allowed between the body of resistor to the top of PCB This is to prevent any arcing of high voltage from resistors to the ground plan b Solder the 8 pcs film capacitors 2 pcs LEDs and 3 VRs Note that the VRs P1 and P2 should have the same direction of the P3 as shown below c Solder the 3W resistors Solder the Jfets K170 and J74 Q1 and 02 Then solder the transistors Q7 and Q8 e Lastly solder the E capacitors Note that J15 and J16 TH1 are Thermistor 4k7 black color The leads should be insulated by the shrink wrap provided J6 J8 J10 amp J11 are M3 holes mounting for the PCB Use a M3 x 16mm with 10mm post stud on the bottom side to mount the PCB onto the heat sink INPUT4 INPUT2 OUTPUT GND F5 T
9. ately and trouble shoot e Ifthere is no error then adjust P1 slowly in clockwise direction until you see the output DC voltage start to increase Stop at about 100mV Then adjust P2 in clockwise direction slowly The DC offset at output will then drop and then stop adjust P2 when at OV 1mV Note the voltage drop in R20 and R23 They should be have some readings but no more zero f Ifyou adjust the P2 more than required the dc offset will go to negative voltage In that case turn the P2 anti clockwise and the voltage will be back to around OV g Target bias of 1A for the three pairs of mosfet in total or per channel then the voltage across R20 and R23 should be 0 167V If target bias is 2A then the voltage across the R20 and R23 should be 0 333V Note that the voltage across R20 and R23 will not be the same but should be close within 1096 if the mosfet are well matched e WA h Then repeat the step e until the target bias current is reached When the voltage across the R20 is more than 0 15V the output dc offset should only be adjusted to up 50mV to ensure the bias is not increased too fast When the bias is up to 0 2V across R20 adjust the dc offset to about 10 to 20mV to slow down the bias increment In fact when you adjust the heat sink is cold and thus the bias should only be 80 of the target value The reason is that when the heat sink is hot the bias will increase due to thermal drift Let the F5 Turbo PCB User
10. e coupling 3 DC RC LFREJ HFRE JI slo e 3 Pos Window Freqg 3 nn 98 98 Hz pkpk C3 425 8mV 3 U mp1 3 395 9mV a H 304 TmV ho ldofFF 5 ms 5 ms Time Evts trig only boig only tr ig only gt P s trigpenly 2 MS s V DC Arnd Kl4 s2pU Bb HFREJ 58 1mV aG only STOPPED Ripple after Resistor 98mVpp AU TAP SETUP 2 TRIGGER SETUP UNDO lt BEL CHANGES M tr igger on UNDO TRIG 126 4 Ext CHANGES Ext5 Line coupling 3 UNDO HORIZ DC RC LFREJ CHANGES HF wawa slope 3 UNDO VERT Neg CHANGES Window Fregi eq 180 17 Hz pkpk 4 m ess RETURN ampli Eid 4 BR to go back amp Ge ho1doFF ms ya i Ke 2 ms OFF T ime Ey s 1 trig only 1 trig only 2 trig only 2 00mv RC HFREJ 1 2mV STOPPED TU onl u STOPPED F5T pcb Tue Nov 13 12 51 40 2012 0 0 A X uollisoq yidap wwg pW uld p wwg CH YUISIDAH 8 00Z Fu Q O s Or 8 762 YA 8 96Z YA OC 8 YN deer m k ly O Cer YN DC S vdz CR O G GCL CN k COS Srog CW CG OpZ CN 0S Gel EN O eg O9L EN O 0S ZL an OS gzc f SL ZL CN vugoe Q r TET EO eos GL 8Z N L 6L S y94 CH LL ISSEL EN Qu 26c PN t i s Sel bs 001 Su y 001 8zET vn 001 Se CH Co Feet EN OZL G v97 CH uwgos DEL EE Jon wg SZL 8Z EN GZL ZL ON
11. l 1500mil 22 9mm 20 3mm F5T pcb Tue Nov 13 12 52 59 2012
12. t the Rifa cap is below 5mV Bias is set to 1 7A to 1 8A per channel and heat sink temperature is 52 deg C room temp is 20 deg C The idle noise level is around 100uV which is very low in the AP measurement FFT and Distortion vs Power charts are attached in this document for reference Distortion at 1W 8 2 ohm load is 0 004 The use of an inductor 1mH air coil AWG 14 solen improves the ripple of the power supply by about 20 times You can see the measurement in attachment page For this set the ripple is about 4 5mV peak to peak and the waveform is more rounded like a sine wave In fact not only the ripple is improved the sound is even more relaxing and smooth Thus this is highly recommended upgrade as the cost to add a 1mH inductor is cheaper than adding one more filter capacitor Attachment follows FET Audio Uo 10 0 10 50 60 70 80 90 100 110 120 130 140 150 160 170 180 20 al V wii Hut m D M Mil MI d UN T du li T T LIPPE OM JM 50 100 200 500 1k 2k Hz Im ii L 12 12 12 20 47 42 Wi M p IN W il IN 5k 10k 20k Sweep Trace Color Line Style Thick Data Axis Comment 1 Red Solid 1 2 Magenta Solid 1 Fft Ch 1 Ampl Left Fft Ch 2 Ampl Left Set 3 32V supply F5T FFT2 at27 A A 2 CHANNEL THD vs FREQ 12 12 12 20 58 00
13. urbo V3 a in u gt SS z Ki Gi F5 Turbo PCB User Manual Version 3 Page 3 h Q3 Q4 and Q9 are marked IRF9240 solder 2SJ201 at these locations i Ob Q6 and Q11 are marked IRF240 solder 2SK1530 at these locations j D1 D5 and D7 are MUR3020W locations k When mounting the mosfet and MUR3020W make sure an insulation thermal sheet is used to isolate the body from the heat sink l Thedrilling dimensions of the heat sink are provided at the end of this document A heat sink size of 200mm x 400mm is used as an example m Insert the PCB mounting screws total 4 from top and screw in a 10mm spacer post at the bottom of the PCB n When mounting the mosfet fix them onto the heat sink as shown Bends the leads about 90 deg upwards Put the PCB on top and then insert all the leads total 18 into the pad holes of the PCB It will take a bit time to do so Press down the PCB and then tighten the 4 PCB screws Tighten the screws until they are in position O Loosen the mosfet mounting screws a bit so that they will release some of the force on the leads Tighten all the screws of the mosfets again F5 Turbo PCB User Manual Version 3 Page 4 p Note that the MUR3020W should have their leads bended 90 deg also and then inserted into the PCB holes from bottom of the PCB Do not forget the insulation sheet for them It should be quite easy to do so as the leads of MUR3020 is just long enough to protrude out the
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