Кто собирал Electro Harmonix Big Muff Опции

[Тёмыч]

Хочу собрать такой девайс, но на схеме не указано какие там используються транзисторы и диоды, кто собирал сей девайс подскажите!

[Иванов Андрей]

Транзисторы - кремниевые, диоды - тоже... Ку каждого каскада не более 150 (15 ком/100 ом минус ООС), так что любые кремниевые транзюки с Ку >= 150 имхо... Вот тебе для начала: ;))) Big Muff Pi Fuzz Modifications Revision: 2004 JAN 21 The Big Muff reissues are inexpensive to buy. Unless you are going to modify the circuit from the original state, there's really no sense in building one, just buy the reissue and save yourself the trouble of building one. The most obvious difference here, is the true bypass switching that is already built into this project and is not featured on the real thing. Another thing to consider is building this with high quality capacitors and metal film (1% tolerance) resistors. This will most likely lower the noise and improve the tone. Also I would suggest socketing the transistors and trying different transistors,until you find a combination that offers the least amount of noise. 2N5089 transistors may produce less noise than 2N5088s. It has been suggested that lower gain transistors may give you less noise and possibly better tone without sacrificing any gain. Don't forget that the Vox Suppa Tone Bender Project is very similar to the Big Muff. Its basically the same circuit with a different form of distortion clipping. So, in a way, the Suppa Tone Bender is a mod to the Big Muff Pi. 1. As suggested on R.G.'s schematic: replace the 1.0uf caps with 0.1uf caps. Reference numbers on the parts layout are: C1, C3, C4, C7, C13 2. As suggested on R.G.'s schematic: replace the 0.1uf caps with 1.0uf cap.s Reference numbers on the parts layout are: C6 and C9 3. Here is a very popular, good sounding tone stack mod. Replace the C10 & C11 capacitors with this values: C10 - 0.022uF C11 - 0.1uF From Mark Hammer: 1) higher value caps in the B-to-C path (e.g., 560 instead of 500pf) can mellow things out a bit 2) having a slightly lower clipping threshold in the second set of diodes (e.g., by selecting for clipping threshold or using Si for stage 1 and Ge for stage 2) may produce a bit more animation in the sound (change in fuzz quality as the note is held) 3) using a slightly higher cap value in the diode path (e.g., .22uf instead of .1uf) can introduce more bottom and clip a little more easily 4) Changing the tone stack component values can introduce different amount of bottom retention From Jake Nagy: 1) Alter diodes. Try 3 germanium on each side or on one side for asymmetrical clipping (Jack Orman). Changing diodes in second stage may have bigger effect on sound and may cause the distortion character to change as the note is held (Mark Hammer). 2) Reduce coupling caps between stages and input and output caps to .1uF or so (RG Keen). 3) Reduce coupling cap before sustain pot to .01uF to decrease muddiness (??). 4) Use film caps. 5) Increase feedback caps in 3 stages to mellow out the sound. Try 560pF. Decrease for more buzziness. (Mark Hammer) 6) Increase feedback cap before diodes for more bass and gain. Try .22uf to 1uf. (RG Keen). 7) Try different transistors. Lower gain transistors might produce less noise without sacrificing distortion (??). Some possible transistors in order of approximate hFE: MPSA05, 2n3904, 2N5088, 2N5089, and MPSA18. 8) Experiment with tone stack. Check AMZ. Increase .01uF for more bass. Decrease .0047uF for more highs. (Aron Nelson) 9) Experiment with the 100K bias resistor to ground from base of 3rd transistor. Adding this moves bias more toward linear range and may produce a clearer sound to you (Jack Orman). However, leaving it out produces asymetrical clipping because one side of the waveform clips before the other due to the misbiased transistor. This is said to produce a warmer distortion that "blossoms" as the note decays. (Aron Nelson). 10) Try class 3 ceramic caps in tone section. Said to produce a "smoother" sound with wider sweet spot in the tone control. (Ed Rembold) 11) To increase sustain try reducing values of coupling resistors (say to 2.2K) or increasing feedback resistors (to 1 to 2M). Or place 2 1M Rs in series with a.01uF cap to ground between them to form voltage divider in feedback loop. (Frank Clark?) 12) Use a JFET (e.g., MPF102, 2N5457, J201, NTE458, etc.) for last stage transistor. Drop the two bias resistors from the base and add a 1M from gate to ground. 13) Experiment with the bias of transistors. The values of the bias resistors reportedly vary among Big Muffs, causing them to sound subtly different (My store-bought BMPI came with values for the collector and emitter resistors that differed by a few K). Copyright 2004 JD Sleep http://www.generalguitargadgets.com ЗЫ мне хватило кстати драйва даже после второго каскада! ;))))

[Иванов Андрей]

На вот ещё, может поможет... (а может и нет ;))))) http://gtlab.net/forum/index.php?showtopic=1370

[Тёмыч]

Я вот думаю откуда собрать её отсюда: http://gtlab.net/forum/index.php?s=fc856c0110cece47e9fee72d6ef1880c&act=Attach&type=post&id=16098&index=0 ИЛИ отсюда: http://www.generalguitargadgets.com/index.php?option=content&task=view&id=27&Itemid=52 2Ivana а ты откуда её брал? может что подсажешь, и модернизировал ли тыт её?

[Vadim]

Тоже собирал. По схеме с: http://fuzzcentral.tripod.com/schematics.html Точнее: http://bryant02.home.att.net/schematics/bigmuffpischem.gif Не модифицировал.

[Иванов Андрей]

;))) Отовсюду! ;))) Я ж тебе и так "подсадил" достаточно имхо... Этот аглицкий текст кстати с генералнитаргадгетс... Ты его хоть читал? ;)))) Модернизировал ли? ;)))) Да, я ж тебе кидал вторую ссылку на ГТлаб... Ты там был? ;))))) Выкинул пару последних каскадов (гейна и так завались), первый каскад превратил в ранджмастер, поставил германиевые транзюки, перевернул питание и поднял его до 18 вольтей ;)))). А так - тот же каскад на транзисторе с диодами в ООС с раскачкой бустером! ;)))

[Wals]

Я собирал...

[Тёмыч]

2 wals: И как звучёк? Гейну хватает?

[uzerPRO]

Гейну там до жопы. Правда он(гейн) запертый по низу, поэтому четкого штриха не будет.

[Wals]

Эту примочку нужно использовать только для подогрева комба. Никак иначе. Гейну там выше крыши, собственно говоря Биг Мафф и позиционируется как сустейнер. Впрочем, если на нем выставлять совсем немного гейна, то он неплохо изменяет звук в сторону индустриальной жесткости при подогреве лампового комбика. Просто в линию использовать Биг Мафф не нужно - ничего путнего не выйдет.