پاسخ : آمپلی فایر حرفه ای 100در 100 عملی با C5200وA1943
درود بر دوستان
بابا این چه مداریه گذاشتی دمت گرم رفتم ته توشو در اوردم این HI-END هست مدارش لامثب عجب چیزی بوده هاااااااااااااا
اینم لینک سایت اصلیش فقط توی همین سایت هست این مدار ولی شیلتره :
hobbyelectronicsdri.blogspot.com/2011/06/100w-hi-end-audio-amplifier-symasym5.html
این هم متن اون سایت :
100W Hi-End Audio Amplifier SymAsym5
Symasym5_3
Symasym5, is a "cute" power amplifier, designed with quality but still low price in mind. This resulted in a ClassAB BJT amplifier, using only TO92 transistors for input and VAS, with a reasonable part count. The topology used is well known and consist of a single diffamp for input, plus a 2nd diffamp with current mirror for VAS. This is followed by normal darlington EF outputstage using modern high beta devices. The circuit uses large amounts of feedback over the whole audioband and an unconventional feedback compensation scheme.
Right now symasym is designed to be driven directly from a CD/DVD-player, simply place a 22k poslog stereo pot between player and symasym. (as voltage divider)
Update
The at least change is to reduce C14 from 22pF to 10pF, but i recommend to follow Pavel's advice.
I recommend C14 with 10pF also for MJLs, this increases safety margin.
Do not forget to read Pavel's Review! A very promising evaluation of the qualities to be expected from symasym. Thanks Pavel !
Another update are the resistors R31/32 to be increased from 22ohm to 47ohm.
Symasym5_3 is an update of v5.2, with an improved board layout concerning power gnd, resulting in lower thd for high frequencies, giving more clarity in sound. The Page for symasym5_2 still exists.
If the gain is too high because symasym is driven from preamp, R30 can be increased from 499ohms to 1k, but in this case R16/19 (22 or 33 ohms, not on schematic, REs to Q1/2) are required to keep feedback at same level and
Some Specs
THD: ~0.005% (measured) sim'd: 0.002%
Power into 8ohm: 60 watts
Power into 4ohm: 100 watts
Gain: 32dB (~1:40) full output at 0.7v input (0.5v rms)
Feedback: 57dB
GainBandWidth: ~400Mhz
Slewrate: ~20v/us (symetrical)
Supply voltage: +/- 36v
Biasing: 55ma, ~12mv across a single 0.22 ohm
Measurings: RMAA Symasym5 The measuring setup itself is far from perfect, but gives a good idea !
Frequency response: 3.2hz to 145khz (-1db) using 4.7uf input cap
Phaseshift at 10khz: <3°
More will follow !
Recomended Part
All resistors are standard metal film 250mW except: R1/3/4/7, these are 2W metal film, and the 0.22ohm beeing 5W.
Around R7 is wounded a 0.6mm isolated (enamelled) copper wire forming the output coil. (~12 windings)
For c19 i used 470uf/16v, all other electrolytics 63v. The 10/100/330pF should be mica-caps.
The 100nf and 47nf is recommended to be Wima MKS2 (or better), also for C1 i suggest Wima MKS2, 4.7uf is enough.
For Trimpot i use a Piher. The MPSA18 can be substituted by BC550C, for all other parts i do not recommend changes, especially the feedback network (r29/30) should be kept unchanged, feedback compensation is very delicate for this circuit !
Be careful when substituting the MPSA18 with BC550C, the pinout is reversed between these 2 transistors !!!
The bias is adjusted via the trimpot (R22). Recommended bias is 55ma, resulting in 12mv across a single 0.22ohms or 24mv across both 0.22ohms. Connect a DMM to the upper wires of these resistors and adjust trimpot until DMM reads wanted voltage.
یک سوال تنظیم پتانسیومتر چه طوریه ؟؟؟؟
درود بر دوستان
بابا این چه مداریه گذاشتی دمت گرم رفتم ته توشو در اوردم این HI-END هست مدارش لامثب عجب چیزی بوده هاااااااااااااا
اینم لینک سایت اصلیش فقط توی همین سایت هست این مدار ولی شیلتره :
hobbyelectronicsdri.blogspot.com/2011/06/100w-hi-end-audio-amplifier-symasym5.html
این هم متن اون سایت :
100W Hi-End Audio Amplifier SymAsym5
Symasym5_3
Symasym5, is a "cute" power amplifier, designed with quality but still low price in mind. This resulted in a ClassAB BJT amplifier, using only TO92 transistors for input and VAS, with a reasonable part count. The topology used is well known and consist of a single diffamp for input, plus a 2nd diffamp with current mirror for VAS. This is followed by normal darlington EF outputstage using modern high beta devices. The circuit uses large amounts of feedback over the whole audioband and an unconventional feedback compensation scheme.
Right now symasym is designed to be driven directly from a CD/DVD-player, simply place a 22k poslog stereo pot between player and symasym. (as voltage divider)
Update
The at least change is to reduce C14 from 22pF to 10pF, but i recommend to follow Pavel's advice.
I recommend C14 with 10pF also for MJLs, this increases safety margin.
Do not forget to read Pavel's Review! A very promising evaluation of the qualities to be expected from symasym. Thanks Pavel !
Another update are the resistors R31/32 to be increased from 22ohm to 47ohm.
Symasym5_3 is an update of v5.2, with an improved board layout concerning power gnd, resulting in lower thd for high frequencies, giving more clarity in sound. The Page for symasym5_2 still exists.
If the gain is too high because symasym is driven from preamp, R30 can be increased from 499ohms to 1k, but in this case R16/19 (22 or 33 ohms, not on schematic, REs to Q1/2) are required to keep feedback at same level and
Some Specs
THD: ~0.005% (measured) sim'd: 0.002%
Power into 8ohm: 60 watts
Power into 4ohm: 100 watts
Gain: 32dB (~1:40) full output at 0.7v input (0.5v rms)
Feedback: 57dB
GainBandWidth: ~400Mhz
Slewrate: ~20v/us (symetrical)
Supply voltage: +/- 36v
Biasing: 55ma, ~12mv across a single 0.22 ohm
Measurings: RMAA Symasym5 The measuring setup itself is far from perfect, but gives a good idea !
Frequency response: 3.2hz to 145khz (-1db) using 4.7uf input cap
Phaseshift at 10khz: <3°
More will follow !
Recomended Part
All resistors are standard metal film 250mW except: R1/3/4/7, these are 2W metal film, and the 0.22ohm beeing 5W.
Around R7 is wounded a 0.6mm isolated (enamelled) copper wire forming the output coil. (~12 windings)
For c19 i used 470uf/16v, all other electrolytics 63v. The 10/100/330pF should be mica-caps.
The 100nf and 47nf is recommended to be Wima MKS2 (or better), also for C1 i suggest Wima MKS2, 4.7uf is enough.
For Trimpot i use a Piher. The MPSA18 can be substituted by BC550C, for all other parts i do not recommend changes, especially the feedback network (r29/30) should be kept unchanged, feedback compensation is very delicate for this circuit !
Be careful when substituting the MPSA18 with BC550C, the pinout is reversed between these 2 transistors !!!
The bias is adjusted via the trimpot (R22). Recommended bias is 55ma, resulting in 12mv across a single 0.22ohms or 24mv across both 0.22ohms. Connect a DMM to the upper wires of these resistors and adjust trimpot until DMM reads wanted voltage.
یک سوال تنظیم پتانسیومتر چه طوریه ؟؟؟؟
این مدار تو ورودیش کار شده تا خروجی با کیفیتی رو بده بر خلاف مدار هایی که چند تا ترانزیستور قدرت ردیف کردند اونوقت یه ورودی ساده وبی کیفیت با با درایور ضعیف وناپایدار ختم میشه من این مدار و چند سال پیش ساختم و بسیار با کیفیت وقدرتمد بود ولی از اون متاسفانه هیچ تصویری تو هاردم پیدا نکردم که فکر میکنم قبلا اشتباهی دلیت شده برای همین هیچ ادعایی تو این تایپیک نکردم (خلاصه ما دوستانو جای بد نمی بریم ) 
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