Diamond Compressor.pdf

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1、RoughCut FX TYPE: Compressor Based on the Diamond Compressor Enclosure Size: 125B “Softie” compatibility: Softie1&2 2020 madbeanpedals Overview The Rough Cut is an amalgamation of the variations/mods of the Diamond Compressor for guitar. Its a very clean and articulate optical compressor that has in

2、credibly smooth envelope response. Its a great sounding, modern optical compressor for guitar so if you like the squishy squish this one is for you! The Rough Cut includes mods featured in different versions which allows one to bypass the EQ circuit altogether or add a bit of high cut. The high cut

3、was accessible as an internal dip switch (AFAIK) but is made external here. IMO, the Hi Cut is not needed but the option is there for you. The Rough Cut only has one tweak from the stock design - the EQ bypass switch has been reduced from a DPDT to SPDT. In the stock unit, the DPDT does a full EQ by

4、pass by disconnecting R19 (my schematic). However, this leads to an annoying “pop” when the switch is engaged due to the voltage differences on that side of the switch. Changing this to an SPDT to bypass only the output of the EQ circuit eliminates the pop and there is no difference at all in tone a

5、t all by leaving the front end of the EQ circuit active in the bypass mode (at least as far as I can tell). Controls VOL: Total output. COMP: CCW: least compression, CW: highly compressed. EQ: CCW: treble cut, CW: treble boost. EQ BYP : This switch bypasses the EQ circuit. HI CUT: This optional swit

6、ch can be used to cut a bit of treble content (can be used in either EQ or EQ bypass mode). Terms of Use: You are free to use purchased RoughCut circuit boards for both DIY and small commercial operations. You may not offer RoughCut PCBs for resale or as part of a “kit” in a commercial fashion. Peer

7、 to peer re-sale is fine, though. Technical assistance for your build(s) is available via the madbeanpedals forum. Please go there rather than emailing me for assistance on builds. This is because (1) Im not always available to respond via email in a timely and continuous manner, and (2) posting tec

8、hnical problems and solutions in the forum creates a record from which other members may benefit. PartsRoughCut madbeanpedals ValuesRoughCut madbeanpedals TracesRoughCut madbeanpedals B.O.M.RoughCut madbeanpedals ResistorsCapsDiodes R11MC1100pFD1 - D61n914 R2475kC2100nD71N4001 R3100RC3330nTransistor

9、s R422kC4100nQ1 - Q62n3904 R5475RC5100pFICs R6100kC61uFIC1OP275 R71kC73n3IC2LM358 R8475kC815nOpto R96k4C910nVACT_1VTL5C3 R103k3C1010nSwitches R11100kC112u2EQ_BYPOn/On R12100kC12100nHICUTOn/On R13475kC133n3Pots R14220kC14330nEQ50kB R15475kC155n6VOL100kA R16220kC165n6COMP100kB R173k3C17100pF R1810kC18

10、100uF R19100RC19100n R2022kC20100n R21475RC2147uF R2247k5CX100n R2347k5CY100n R2415k R2515k R2647k5 R2747k5 R28475k R29100R R304k7 R3110k R3210k Shopping ListRoughCut madbeanpedals ValueQTYTypeRating 100R3Metal / Carbon Film1/4W 475R2Metal / Carbon Film1/4W 1k1Metal / Carbon Film1/4W 3k32Metal / Car

11、bon Film1/4W 4k71Metal / Carbon Film1/4W 6k41Metal / Carbon Film1/4W 10k3Metal / Carbon Film1/4W 15k2Metal / Carbon Film1/4W 22k2Metal / Carbon Film1/4W 47k54Metal / Carbon Film1/4W 100k3Metal / Carbon Film1/4W 220k2Metal / Carbon Film1/4W 475k5Metal / Carbon Film1/4W 1M1Metal / Carbon Film1/4W 100p

12、F3Ceramic / MLCC16v min. 3n32Film16v min. 5n62Film16v min. 10n2Film16v min. 15n1Film16v min. 100n7Film16v min. 330n2Film16v min. 1uF1Electrolytic16v min. 2u21Electrolytic16v min. 47uF1Electrolytic16v min. 100uF1Electrolytic16v min. 1n9146 1N40011 2n39046 OP2751 LM3581 VTL5C31 On/On1SPDT - Solder Lug

13、 On/On1Mini SPDT 100kB1PCB Right Angle16mm 50kB1PCB Right Angle16mm 100kA1PCB Right Angle16mm madbeanpedals Parts GuideRoughCut OP275: If you cannot get the OP275 use a comparable dual op-amp such as the TL072, OPA2134, etc. LM358: http:/smallbear- VTL5C3: http:/smallbear- SPDT On/On: http:/smallbea

14、r- Mini SPDT: http:/smallbear- 16mm Right Angle Pots (100kB, 50kB, 100kA): http:/smallbear- Thinline DC Jack: http:/smallbear- Enclosed Mono: http:/smallbear- http:/smallbear- Lumberg Mono: http:/smallbear- NotesRoughCut madbeanpedals Not much to add here. Its a simple build. I did use one of the XV

15、IVE 5C3 repros and it worked perfectly. I do not recommend trying to “roll your own” vactrol with an LED/LDR combo. Stick with whats known to work well for this compressor circuit. I did not try the Cool Audio version of the 5C3 but it may also work fine here. Wiring DiagramRoughCut madbeanpedals 12

16、5B Drill GuideRoughCut Note: Drill Guides are approximate and may require tweaking depending on the types of jacks, switches and pots you use. madbeanpedals Shown with Softie 2 relay bypass but you can also use the Softie 1 (might want to move the switch location down a bit if using the Softie 1). I

17、f you are using just a regular 3PDT instead of relay bypass you can use the same drill spot. Be sure to only drill one LED hole! There are two shown in the diagram: one for PCB mounting and one for the Softie. Enclosed top jacks are used here, but you should also be able to fit open- frame metal jac

18、ks or the Lumberg style. VoltagesRoughCut madbeanpedals 9.42vDC One Spot Current Draw 11mA IC1OP275IC2LM358Q12n3904Q22n3904 14.3114.32C8.65C1.45 24.3124.32B2.03B1.11 34.1134.12E1.45E0.44 4040 53.9854.01Q32n3904Q42n3904 64.264.1C7.1C7.1 74.3174.31B0B0 88.6588.65E0E0 Q52n3904Q62n3904 C8.65C3.66 B4.31B1.11 E3.66E0.44 Build PicRoughCut madbeanpedals Prototype board, which originally used a DPDT. Here Ive jumpered one half of the switch to make it effectively an SPDT. Still waiting to get an OP275 so I used a TL072 for now. SchematicRoughCut madbeanpedals