TubeOhm De-Generator Assembly And Alignment
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- Building instruction (20 pages) ,
- Building instruction (23 pages)
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Summary of Contents for TubeOhm De-Generator
- Page 1 De-Generator Assembly and alignment of the individual components V 1.03 as of 12.01.2020 www.tubeohm.com...
- Page 2 Now that all components are soldered, checked and hopefully cleaned, the last step comes. The next step is the assembly of the single components on the motherboard and the adjustment of motherboard and filterboard. We now have the following components: CPU Board Filterboard Motherboard...
- Page 3 Now we will build the de-generator first of all together That's what we need: Abstandshalter/spacer 7x5mm spacer Female/male M3 7x30 mm spacer Male /male M3 6x9mm spacer Female /male M3 2x20 Pol cable CPU to Pannelboard 2x 20 Pol cable /80 mm...
- Page 4 Here a view how the spacers have to be screwed together with the PCBs. The 5mm spacers come down, then the motherboard, then the 30 mm spacer, then the panel board. The panelboard is screwed with 9mm spacers. At the 5mm and the 9mm spacers the case will be screwed later.
- Page 5 >>> -7,5...8,2 is OK Now the voltages on the filter board can be checked. If all voltages are correct, the de-generator is switched off again and the filter board is pulled out of the slot. Then it can be equipped with the ICs.
- Page 6 Installing the CPU Board Now the CPU board can be plugged into the CPU board position. Pay attention also with the CPU board to the fact that all plugs are correct in the sockets!
- Page 7 The 2x 20 pin connecting cables are connected to the CPU board. 2x 20 pin cable from CPU Board to Pannel Board Mic Cable Volume cable And then the CPU board is put on the motherboard. See picture - all cables have to be plugged in this way. Connection of the volume cable.
- Page 8 Attention, please note that there is no short circuit between the ribbon cable and the switching regulator. Pay attention to the polarity of the MIC cable. Now that all boards are in their place, the CPU board and the panel board are connected with the two 2x20 pin cables.
- Page 9 Checklist the motherboard is tested as far as possible. All voltages are correct. The ICs are correct in the sockets ??!! Check again ! the filterboard is checked, all voltages are correct, the ICs are correct in the sockets. The filterboard is correctly plugged on the motherboard. Please check again ! the CPU board is checked by us.
- Page 10 This means that the right and left filter must be adjusted in V/OKT, and then again among each other ! Sounds complicated, but it is not. The de-generator is switched on. Both audio sockets are connected to one -stereo input of the amplifier.
- Page 11 ***The second encoder is used to set the bank. With the LOAD button , the sound program is loaded at the lower left *** Now the de-generator should play three tones in the LOOP. Click to listen to an audio sample>>>...
- Page 12 Attention - it is not important which frequency the second filter has. It is important that the frequency doubles over the three tones! Both audio connectors are connected to the de-generator. The first filter now has e.g. 80,160 and 320 Hz.
- Page 13 Attention, please note that there is no short circuit between the ribbon cable and the switching regulator. EXT-Volume R74 adjusts the volume of an external input signal. The setting is uncritical. It should be set to avoid overdriving. That was already all to the setting.
- Page 14 The SD RAM card must be inserted into the CPU board. After switching on of the de-generator a TubeOhm logo should appear. The de-generator is connected to MIDI and audio. Then the selection window for the sounds is displayed. Press button 1 to enter the Oscillator menu.
- Page 15 So the delay timing has to be set first ! Procedure for setting the DELAY timing: The de-generator is connected via the audio sockets in -stereo. Load bank 3 the sound > ECHO-CALIB . There is a cracking sound from both loudspeakers.
- Page 16 With the Trimmpotis R17 and R31 both VCAs are adjusted so that they close completely and no sound can be heard anymore. To do this, connect both audio outputs of the de-generator to an amplifier and turn it a little louder. The de-generator should NOT be played with MIDI.
- Page 17 These 0.2 volts generate a current that is sufficient to drive the amplifier. Since the oscillators are always running, you can hear a sound even if the de-generator is not played. With the two potentiometers for each VCA the operating point is shifted so that Ground is actually Ground =0V .
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