Doepfer A-185-2 Precision Adder / Bus Access

PRECISION CONTROL VOLTAGE ADDERModule A-185-2 is a precision control voltage adder/buffer. Precision means that the amplification of the inputs without attenuators is exactly 1.00 and is suitable to add control voltages for the pitch control of VCOs (e.g. from keyboard + sequencer 1 + sequencer 2). Summing resistors matched to 0.1% are used to obtain an accuracy of 0.1% for the added voltages.The module is equipped with four CV inputs: one with attenuator and three without attenuator. Each input is normalled to +1 V (i.e. if no plug is inserted the input contributes 1 V to the sum appearing at the output).The input with attenuator can be used for common modulations (e.g. from an LFO, ADSR, Theremin, Pitch-Bender) for all VCOs connected to the output. The Lev.1 control is used to adjust the depth of the modulation, the first switch selects the polarity of the modulation. If no signal is connected to the first socket the attenuator works as a (fine) tuning knob because a voltage in the range 0...+1V (right position of the switch) or 0...-1V (left position of the switch) is added to the CV output.The inputs without attenuators are planned to add control voltages coming out of keyboards, sequencers, Midi-to-CV interfaces, ribbon controllers or other CV sources that follow the 1V/oct standard. For example the CV of a keyboard can be used to transpose the CV coming from a sequencer, or the CV of a slow sequencer can be used to transpose the CV from a fast sequencer.Each input is equipped with a three-position switch that determines if the corresponding voltage is added (right position), subtracted (left position) or if the input has no effect (center position). If no plug is inserted the corresponding switch works as an octave switch for the lower three sections as the default 1 V are added or subtracted to the output voltage according to the switch position. The first switch can be used to add a variable voltage to the sum output. The variable voltage is adjusted with the Lev.1 control and the knob works then as kind of a (fine) tuning control.The module is equipped with 4 outputs: three non-invertíng and one inverting ouput. An internal jumper can be used to connect the non-inverted or inverted output to the CV line of the A-100 bus. That way the module can used to control several VCOs that are connected to the same bus board as the A-185-2 (same functionality as A-185-1).Remark for A-185-2 users: There is a pin header with three pins (labelled JP5) near the bus cable connector. If no jumper is installed there is no connection between the outputs of the A-185-2 and the CV line of the A-100 bus. In the lower position the normal CV output of the A-185-2 is connected to the CV line of the A-100 bus. In the upper position the inverted CV output of the A-185-2 is connected to the CV line of the A-100 bus.Features4 CV inputs4 outputsSpecifications:10 mA +12V10 mA -12V0 mA 5VWidth: 6HPDepth: 50mmRETURNSThe majority of items that we sell are covered by the Distance Selling Regulations in the UK which gives you 30 working days from receipt of the goods to cancel the contract and return them. There are some items which are not covered by the DSR's including Software and Hardware that includes Software needed for it's operation and Music items (Records, CD's DVD's and so on), (mainly in ear headphones and microphones).If you do wish to return an item then please contact us and we'll give you the relevant information - buyers are responsible for the cost of shipping items back to us and also for ensuring they arrive back to us in good condition. If the returned items arrive back to us in a damaged state, or the product's original box/packaging is damaged, we reserve the right to deduct an amount from the refund in order to compensate for the damage. This amount will be decided by our staff after inspection of the items.If you have received an item and it is faulty then please get in touch straight away. We will do our utmost to sort out any problem quickly and to your satisfaction.Where items are faulty within 7 days from date of purchase, they will be classed as an out of box failure. These items will be collected, and replaced with an identical product (subject to availability of stock).We may ask you to post small, low cost items, such as headphones, back to us.Any items over 30 days old will need to be returned to either our service department, the manufacturer or their appointed agent for warranty repair. We will always advise you of the return address details that you should send the goods to where this is not our normal returns address.
PRECISION CONTROL VOLTAGE ADDER

Module A-185-2 is a precision control voltage adder/buffer. Precision means that the amplification of the inputs without attenuators is exactly 1.00 and is suitable to add control voltages for the pitch control of VCOs (e.g. from keyboard + sequencer 1 + sequencer 2). Summing resistors matched to 0.1% are uséd to obtain an accuracy of 0.1% for the added voltages.

The module is equipped with four CV inputs: one with attenuator and three without attenuator. Each input is normalled to +1 V (i.e. if no plug is inserted the input contributes 1 V to the sum appearing at the output).

The input with attenuator can be uséd for common modulations (e.g. from an LFO, ADSR, Theremin, Pitch-Bender) for all VCOs connected to the output. The Lev.1 control is uséd to adjust the depth of the modulation, the first switch selects the polarity of the modulation. If no signal is connected to the first socket the attenuator works as a (fine) tuning knob because a voltage in the range 0...+1V (right position of the switch) or 0...-1V (left position of the switch) is added to the CV output.

The inputs without attenuators are planned to add control voltages coming out of keyboards, sequencers, Midi-to-CV interfaces, ribbon controllers or other CV sources that follow the 1V/oct standard. For example the CV of a keyboard can be uséd to transpose the CV coming from a sequencer, or the CV of a slow sequencer can be uséd to transpose the CV from a fast sequencer.

Each input is equipped with a three-position switch that determines if the corresponding voltage is added (right position), subtracted (left position) or if the input has no effect (center position). If no plug is inserted the corresponding switch works as an octave switch for the lower three sections as the default 1 V are added or subtracted to the output voltage according to the switch position. The first switch can be uséd to add a variable voltage to the sum output. The variable voltage is adjusted with the Lev.1 control and the knob works then as kind of a (fine) tuning control.

The module is equipped with 4 outputs: three non-invertíng and one inverting ouput. An internal jumper can be uséd to connect the non-inverted or inverted output to the CV line of the A-100 bus. That way the module can uséd to control several VCOs that are connected to the same bus board as the A-185-2 (same functionality as A-185-1).

Remark for A-185-2 users: There is a pin header with three pins (labelled JP5) near the bus cable connector. If no jumper is installed there is no connection between the outputs of the A-185-2 and the CV line of the A-100 bus. In the lower position the normal CV output of the A-185-2 is connected to the CV line of the A-100 bus. In the upper position the inverted CV output of the A-185-2 is connected to the CV line of the A-100 bus.

Features
  • 4 CV inputs
  • 4 outputs
Specifications:
  • 10 mA +12V
  • 10 mA -12V
  • 0 mA 5V
  • Width: 6HP
  • Depth: 50mm


RETURNS

The majority of items that we sell are covered by the Distance Selling Regulations in the UK which gives you 30 working days from receipt of the goods to cancel the contract and return them. There are some items which are not covered by the DSR's including Software and Hardware that includes Software needed for it's operation and Music items (Records, CD's DVD's and so on), (mainly in ear headphones and microphones).

If you do wish to return an item then please contact us and we'll give you the relevant information - buyers are responsible for the cost of shipping items back to us and also for ensuring they arrive back to us in good condition. If the returned items arrive back to us in a damaged state, or the product's original box/packaging is damaged, we reserve the right to deduct an amount from the refund in order to compensate for the damage. This amount will be decided by our staff after inspection of the items.

If you have received an item and it is faulty then please get in touch straight away. We will do our utmost to sort out any problem quickly and to your satisfaction.

Where items are faulty within 7 days from date of purchase, they will be classed as an out of box failure. These items will be collected, and replaced with an identical product (subject to availability of stock).

We may ask you to post small, low cost items, such as headphones, back to us.

Any items over 30 days old will need to be returned to either our service department, the manufacturer or their appointed agent for warranty repair. We will always advise you of the return address details that you should send the goods to where this is not our normal returns address.
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