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Summary of Contents for VAMISOUND Schoeps LDC
- Page 1 Schoeps LDC BUILDING INSTRUCTIONS...
- Page 2 SCHOEPS LDC BUILDING INSTRUCTIONS Dear friend, first of all thank you for your support and choice of the VAMISOUND product. We wish you a happy DIY and the joy of a new microphone in your arsenal!! Jan and Milan...
- Page 3 Before you start building your new microphone please carefully read this building instructions. Attention: Schoeps LDC is a medium-heavy project. The circuit is made up of only a few components. However, it should be borne in mind that certain manual skills will be required or the successful completion of the mic construction.
- Page 4 The Schoeps style LDC board allows you to build a microphone that is based on the circuitry from the legendary Schoeps small diaphragm microphone. However, thanks to a small modification of the circuit, it can use a large diaphragm capsule. The circuit is frequency flat, with no internal equalizer, so capsules like the C12, M7 or K47 fit perfectly with it.
- Page 5 Here, for the sake of illustration, a different point of view. Continue by soldering diodes D1 and D2.
- Page 6 The zener diodes D3, D4 and D5 follow. Next in order are inductors. There are 4 of them on the board.
- Page 7 Continue with ceramic capacitors C7, C8 and C11.
- Page 8 Film capacitors always light up the whole board :-) Don’t install C5 now. You can use this with a very bright capsules. C5 forms LPF. Experiment with values around 22nF if necessary. Now solder the transistors to the board. Notice that on the board around the footprint of the FET transistor there are small marks D, S and G (= drain, source and gate).
- Page 9 Solder the two trimmer resistors into their place. Now it's time to carefully clean the bottom side of the printed circuit board. Isopropyl alcohol and a toothbrush is your good helper.
- Page 10 After cleaning the board, solder two electrolytic capacitors from the bottom side of the board. Now it's time to create a filter directly on the XLR connector insert. Connect the first capacitor between pin 1 and pin 2 of the XLR connector and the second between pin 1 and pin 3. At the same time connect pin 1 via resistor leg to the ground lug of the XLR connector insert and solder the three cables too.
- Page 11 Screw the prepared XLR connector into the microphone chassis.
- Page 12 Screw the microphone board to the chassis and solder the three cables to the appropriate pads on the board.
- Page 13 Install the capsule holder. Now it's time to attach your favorite capsule to the holder. As stated earlier the Schoeps LDC is a frequency flat circuit very suitable for capsules like C12, K47 or M7 that do not need frequency correction.
- Page 14 Solder the cable from the front diaphragm to the teflon pin on the underside of the board. Solder the cable from the backplate to the pad marked BCKP on the circuit board.
- Page 15 Put the head basket on the microphone and you can proceed to the first test of the microphone. Connect the microphone via cable to the preamp and activate phantom power. Adjust the voltage on trimmer P2 so that you measure 55V to 60V (higher voltages could damage your capsule!!!!) at the cathode of diode D1 against 0V (ground) on the board.
- Page 16 Congratulations! Your new microphone is now complete and ready to use!!!
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Page 17: Additional Info
WIRRING INFO 1) Capsule wiring: Front membrane cable to teflon pin marked as FD from the bottom side of pcb. Cable from capsule backplate to BCKP pad on the mic pcb. 2) Its always great idea to check phase of DIY microphone against commercial microphone. ADDITIONAL INFO Take you time when soldering the XLR insert. - Page 18 Part Value Tol. Min.V Dimmensions link 1 link 2 notes olt. Resistors 10 % 6.5x2.5mm mouser link 6.3x2.4mm mouser link matched to R3 mouser link matched to R2 mouser link mouser link matched to R6 mouser link matched to R5 mouser link mouser link 20 %...
- Page 19 Part Value Tol. Min.V Dimmensions link type notes olt. Diodes 1N4148 mouser link 1N4148 mouser link 6.2V mouser link zener 6.2V mouser link zener 6.2V mouser link zener Inductors 680uH mouser link 120uH mouser link 47uH mouser link filter on XLR 47uH mouser link filter on XLR...