Module A-111-2 is the successor of the obsolete High End VCO I A-111-1.
Here are the most important features of the module:
- triangle core (i.e. all other waveforms are derived from the triangle by waveshapers)
- fully analog design
- min. 15 octaves pitch range (typ. 0.5Hz - 20kHz in VCO mode / 0.001Hz - 40Hz in LFO mode)
- perfect 1V/octave tracking over min. 10 octaves, typ. 20Hz - 20kHz (control LF has to be fully CW for perfect 1V/octave tracking)
- exponential frequency controls and inputs:
- Tune: range can be selected by means of a jumper, about +/- 1 octave (jumper JP6 not installed) or about +/- 3 octaves (jumper JP6 installed)
- Fine: about +/- 1 semitone range
- Octave: range switch with 6 positions for 6 octaves
- 1V/octave CV input
- XFM input with attenuator
- access to internal bus CV (via jumper, optional, please remove the bus jumper if this feature is not used to avoid unwanted frequency modulation as then the unused CV line of the bus works as a kind of antenna)
- linear frequency controls and inputs:
- LF (manual linear frequency control: fully CW = standard setting for usual VCO applications, fully CCW: close to 0Hz frequency)
- works also as a kind of range control for the exponential section but for standard VCO applications with 1V/octave control voltage the LF control should be fully CW !
- LFM input with attenuator, DC coupled
- Pulsewidth controls and inputs (for rectangle output):
- PW (manual pulsewidth control from 0%/output = fixed at "low" state up to 100% / output fixed at "high" state)
- PWM input with attenuator
- Hard Sync input (CEM3340 hard sync type)
- Soft Sync input
- Waveform outputs:
- Sawtooth, output level ~ 10Vpp (voltage range ~ 0 ... +10V)
- Rectangle (controlled from pulsewidth section), output level ~ 10Vpp (voltage range ~ 0 ... +10V)
- Triangle (output level ~ 10Vpp, voltage range ~ -5V ... +5V)
- Sine (output level ~ 10Vpp, voltage range ~ -5V ... +5V)
- Range switch to select VCO/VCLFO mode, frequency relation between VCO mode and LFO mode about 500 : 1
- dual color LED display (to display low frequencies below ~ 25 Hz)
- Nearly "perfect" waveforms
high end triangle to sine converter with excellent sine waveshape (thank's to Tim Stinchcombe who recommended this circuit)
the micro precision VCO A-111-3 uses the same VCO core as the A-111-2, but has less inputs, outputs and controls
The following document shows the positions and functions of the jumpers and trimming potentiometers of the module: A111_2_trimming_potentiometers_and_jumpers.pdf
Technical remarks:
The control voltage applied to the socket 1V/Oct is added to the control voltage coming from the bus (interruptible by removing the jumper JP4). Connecting a cable to the socket 1V/Oct does not interrupt the bus CV connection ! I.e. the 1V/Oct socket is not normalled to the bus CV. This allows e.g. transposing sequence CV (applied to the socket 1V/Oct) by the bus CV (e.g. connected to the CV output of a Midi-to-CV interface).
The module is based on the CEM3340 circuit. The hard sync of the CEM3340 works different compared to most other VCOs. The excerpt from the data sheet below shows the details. The CEM3340 type of hard sync is also explained in the A-111-1 user manual on page 9: A111_man.pdf.
How much is my shipping?
Shipping is automatically calculated before you submit your payment information. Simply add items to your cart and proceed to the checkout page, where you'll be offered shipping options and their prices. In the UK it's normally around £4 for order values under £150, and free above that. Shipping to mainland EU is typically between £7 and £20, depending on the shipping method and the size and weight of the order.
Do you ship to my country?
Almost certainly - the site will give you an estimate of shipping costs if you add an item to the cart and then enter your country and postcode. If you have specific requirements (such as if you prefer UPS over FedEx, for example) then let us know in advance and we'll try to work something out for you.
Shipping methods
We use a combination of Parcelforce, DPD, Royal Mail and UPS for the UK, and for international orders it's either Royal Mail, UPS, DHL or FedEx depending on where you are in the world. If you have a particular preference then try to let us know BEFORE you order so we can look into it for you. Please note that there may occasionally be additional shipping charges if you live in a remote area, depending on what surcharges are applied by the shipper. We'll get in touch to discuss this with you in such cases.
Dispatch times
For UK orders, we normally dispatch the same working day if we get the order before 15:00. If you have a really urgent situation then of course drop us an email before ordering and we'll always do our absolute best to accommodate you.
For international orders, we normally dispatch the same day if we get the order before 13:00 but again, occasionally it might be the next day before we can send it out, and sometimes FedEx or UPS may come a little earlier than scheduled which would also push an order into the next day.
Shipping times
Since April 2020 the couriers we use have suspended guarantees for shipping times, so even though we're paying them for priority services - 24-48 hours for most of the world - in practice it's often an extra day on top and sometimes it can be longer.
There is absolutely nothing we can do about this unfortunately. If you are outside the UK and it's a life-or-death situation where you absolutely MUST have that passive mult for the next day then... it may be better to find a local supplier.
Saturday shipping
If you're in the UK and you order before 15:30 on a Friday then we can send something for a Saturday delivery (NB: this applies to UK mainland addresses only). The success rate with DPD is about 95% so it's worth a punt most of the time. Please note that if you select Saturday shipping on an order placed earlier in the week, we'll wait until Friday to ship it.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch if you have questions.
Product Overview
Module A-111-2 is the successor of the obsolete High End VCO I A-111-1.
Here are the most important features of the module:
- triangle core (i.e. all other waveforms are derived from the triangle by waveshapers)
- fully analog design
- min. 15 octaves pitch range (typ. 0.5Hz - 20kHz in VCO mode / 0.001Hz - 40Hz in LFO mode)
- perfect 1V/octave tracking over min. 10 octaves, typ. 20Hz - 20kHz (control LF has to be fully CW for perfect 1V/octave tracking)
- exponential frequency controls and inputs:
- Tune: range can be selected by means of a jumper, about +/- 1 octave (jumper JP6 not installed) or about +/- 3 octaves (jumper JP6 installed)
- Fine: about +/- 1 semitone range
- Octave: range switch with 6 positions for 6 octaves
- 1V/octave CV input
- XFM input with attenuator
- access to internal bus CV (via jumper, optional, please remove the bus jumper if this feature is not used to avoid unwanted frequency modulation as then the unused CV line of the bus works as a kind of antenna)
- linear frequency controls and inputs:
- LF (manual linear frequency control: fully CW = standard setting for usual VCO applications, fully CCW: close to 0Hz frequency)
- works also as a kind of range control for the exponential section but for standard VCO applications with 1V/octave control voltage the LF control should be fully CW !
- LFM input with attenuator, DC coupled
- Pulsewidth controls and inputs (for rectangle output):
- PW (manual pulsewidth control from 0%/output = fixed at "low" state up to 100% / output fixed at "high" state)
- PWM input with attenuator
- Hard Sync input (CEM3340 hard sync type)
- Soft Sync input
- Waveform outputs:
- Sawtooth, output level ~ 10Vpp (voltage range ~ 0 ... +10V)
- Rectangle (controlled from pulsewidth section), output level ~ 10Vpp (voltage range ~ 0 ... +10V)
- Triangle (output level ~ 10Vpp, voltage range ~ -5V ... +5V)
- Sine (output level ~ 10Vpp, voltage range ~ -5V ... +5V)
- Range switch to select VCO/VCLFO mode, frequency relation between VCO mode and LFO mode about 500 : 1
- dual color LED display (to display low frequencies below ~ 25 Hz)
- Nearly "perfect" waveforms
high end triangle to sine converter with excellent sine waveshape (thank's to Tim Stinchcombe who recommended this circuit)
the micro precision VCO A-111-3 uses the same VCO core as the A-111-2, but has less inputs, outputs and controls
The following document shows the positions and functions of the jumpers and trimming potentiometers of the module: A111_2_trimming_potentiometers_and_jumpers.pdf
Technical remarks:
The control voltage applied to the socket 1V/Oct is added to the control voltage coming from the bus (interruptible by removing the jumper JP4). Connecting a cable to the socket 1V/Oct does not interrupt the bus CV connection ! I.e. the 1V/Oct socket is not normalled to the bus CV. This allows e.g. transposing sequence CV (applied to the socket 1V/Oct) by the bus CV (e.g. connected to the CV output of a Midi-to-CV interface).
The module is based on the CEM3340 circuit. The hard sync of the CEM3340 works different compared to most other VCOs. The excerpt from the data sheet below shows the details. The CEM3340 type of hard sync is also explained in the A-111-1 user manual on page 9: A111_man.pdf.
Technical Specs
Shipping Details
How much is my shipping?
Shipping is automatically calculated before you submit your payment information. Simply add items to your cart and proceed to the checkout page, where you'll be offered shipping options and their prices. In the UK it's normally around £4 for order values under £150, and free above that. Shipping to mainland EU is typically between £7 and £20, depending on the shipping method and the size and weight of the order.
Do you ship to my country?
Almost certainly - the site will give you an estimate of shipping costs if you add an item to the cart and then enter your country and postcode. If you have specific requirements (such as if you prefer UPS over FedEx, for example) then let us know in advance and we'll try to work something out for you.
Shipping methods
We use a combination of Parcelforce, DPD, Royal Mail and UPS for the UK, and for international orders it's either Royal Mail, UPS, DHL or FedEx depending on where you are in the world. If you have a particular preference then try to let us know BEFORE you order so we can look into it for you. Please note that there may occasionally be additional shipping charges if you live in a remote area, depending on what surcharges are applied by the shipper. We'll get in touch to discuss this with you in such cases.
Dispatch times
For UK orders, we normally dispatch the same working day if we get the order before 15:00. If you have a really urgent situation then of course drop us an email before ordering and we'll always do our absolute best to accommodate you.
For international orders, we normally dispatch the same day if we get the order before 13:00 but again, occasionally it might be the next day before we can send it out, and sometimes FedEx or UPS may come a little earlier than scheduled which would also push an order into the next day.
Shipping times
Since April 2020 the couriers we use have suspended guarantees for shipping times, so even though we're paying them for priority services - 24-48 hours for most of the world - in practice it's often an extra day on top and sometimes it can be longer.
There is absolutely nothing we can do about this unfortunately. If you are outside the UK and it's a life-or-death situation where you absolutely MUST have that passive mult for the next day then... it may be better to find a local supplier.
Saturday shipping
If you're in the UK and you order before 15:30 on a Friday then we can send something for a Saturday delivery (NB: this applies to UK mainland addresses only). The success rate with DPD is about 95% so it's worth a punt most of the time. Please note that if you select Saturday shipping on an order placed earlier in the week, we'll wait until Friday to ship it.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch if you have questions.
