SWC-60/SQC-60 mk3 (english)

Aus KeyboardPartner Wiki
Version vom 12. März 2020, 17:04 Uhr von Bovist (Diskussion | Beiträge) (→‎T100/T200/T500-Series)
(Unterschied) ← Nächstältere Version | Aktuelle Version (Unterschied) | Nächstjüngere Version → (Unterschied)
Zur Navigation springenZur Suche springen

Deutsche Anleitung: Siehe SWC-60/SQC-60 mk3


Frequency inverter/power conditioner with 60 Hz output, square or sine wave, noiseless. For US Hammonds to be used in Europe (50Hz) or on instable 60 Hz mains (accepts 40 to 400 Hz input), i.e. to stabilize organ tuning on mains from mobile power unit. Unlike the SQC-60 square wave version, the sine converter SWC-60 fits all electromagnetic Hammonds including those with self-starting motors (L-, H-, T-series). The square-output version SQC-60 has less output power, it fits all Hammond organs with start/run motor (A-/B-/C-series, M-series).

Combined with our optional controller unit the device offers tuning in cent or half note steps.

Crystal stabilized circuit, no deviation from set frequency. Simple installation, is looped into wires to run motor. Unique soft-start technology ensures proper starting even with weak start motors on 50 Hz mains: Frequency is raised smoothly from 50 to 60 Hz on start-up and locked.

Relay output (up to 10A/230V) to power up a Leslie along with organ.

Step-down transformer 230V/117V for organ required (not included) for use in Europe (230V mains). Recommended power rating 160 VA (organ) or 400 VA (organ and Leslie).


PLEASE NOTE: Soldering skills required. Installation requires authorized technician. Disconnect organ from mains before installation or changing fuse (pull mains plug).

Following instructions describe installation in B3-/A100-Series consoles. For other/older models, refer to service manual of your organ and consult a technician.


The converter should be placed on left side inside the organ (seen from behind), either on left wooden side panel or below the generator (on A-100 series). For increased safety and lower noise sensivity, it is mounted in a vented metal box. The metal box must be earthed/grounded by connecting PE terminal to organ’s generator chassis ground to prevent interferences/noise.

The SWC-60/SQC-60 simply has to be inserted into the run motor’s supply wires. Desolder run motor’s wires (two pairs red/black in parallel - do not separate them!) from generator’s wire panel and connect to SQC-60 output terminals #3 and #4. Connect 110V input terminals #5 and #6 of SQC-60/SWC-60 to former motor terminals (middle and rightmost of 7 terminals at console organs, seen from behind) on generator’s wire panel. Leave all other cables going to generator terminal as before. Wire length and polarity is not significant; motor wires may be extended by wires capable of mains voltage only. Use shrink tube for insulation. Connect PE terminal #7 to generator chassis ground and, if present, PE terminal of mains plug. Terminals may be pulled off for easy de-installation or exchange.

A LED inside the power conditioner will flash six times rapidly when powering up, also when tuning changes. It will blink slowly in normal operation.

Wiring of relay output terminals #1 and #2 is optional. Relay contact is closed when motor is running. It may be used to power up a 230V Leslie in European installations.

To replace the fuse, open case (4 screws on sides). Only replace with rated fuse 5x20mm (500mA ... 630mA slow-blow for SQC-60, 1.25A ... 1.4A slow-blow for SWC-60).

US Conversions

117V organs require installation of a 230V/117V step-down/insulation transformer to be used on 230/240V mains. Remove power cabling and old mains plug and replace with IEC socket with proper cabling, including PE (protective earth, green/yellow wire) as shown. Picture also shows use of optional Leslie power relay to power up a 230V Leslie. A 240VA transformer is sufficient for B3- and A-100-type organs. If a 117V leslie is to be powered from organ's step-down transformer, a 400VA type is recommended.

Hammond switches are not suited for 230V use, so we recommend connecting the step-down transformer directly to mains input; 117V original switch wiring must not be changed. Note that the step-down transformer will be "on" all the time, so an external mains switch may be inserted to conserve power.

Swc60-diagram relay.png

Placement of transformer might be tricky to avoid hum in preamp or generator notes. Try best position before final installation of cables.


T-Series organs do have a self-starting motor, connected to a capacitor can. Please change wiring as seen in diagram. The older SQC60 (SWC60 Square) is not suitable.


Hum Supression

Mains line filter

If you ground the SWC60/SQC60 and there is a Leslie with the "death caps" .047uF from each side of AC line to ground removed, you will get a bad hum. We would recommend an encapsulated mains line filter (like this one pictured) rated at 3 Amps min. with ground lug connected to organ chassis, inserted into 117V wires from wiring panel to SWC60/SQC60. For Leslies with "death caps" removed, I would also recommend the installation of a line filter into Leslie Amp.

PCC Connection

PCC attached to SWC60

The PCC power conditioner controller unit is an optional accessory for remote controlling of our new series of Power Conditioners SWC-60, SQC-60 and SQC-50 mk3. It has a built-in LCD and rotary encoder for simultaneous transposing/tuning in half note or cent steps, i.e to achieve orchestral tuning. Box is attached by RJ45 patch cable (included) to CTRL connector of SWC-60/SQC-60. Controller box may be mounted in reach of organist by velcro tape. Always switch organ off before attaching/removing PCC unit!

The PCC has a built-in display with two rows. Upper row shows transpose value (plus 4, minus 3 half note steps), lower row shows fine tuning in cent steps. On power-up, locked mode is active. Press knob to enter transpose mode, indicated by an arrow pointing to NOTE number. Turn encoder knob to change transpose note. Press knob again to activate tuning mode and to go back to locked mode. Setting is saved permanently (even when disconnecting the PCC or power cycling the organ) when locked mode is re-entered. Note: First series of SWC/SQC-60 just toggle between transposing and tuning mode.

It is possible to fine tune the organ even when transposed. The PCC allows transposing of +4 half note steps up or -3 half note steps down. Please note that vibrato frequency also changes with transposing. Also the organ may sound somewhat dull in extreme transpose positions due to fixed generator filter frequencies.

Remark: Older SWC firmwares allowed transposing of plusminus 6 half note steps. Dependant on generator condition, the whole range may not be achieved on every generator; this is not a fault of SWC-60/SQC-60 nor the PCC. Run motor may stall if range exceeded and organ must be restarted thereafter. Also, there is a chance to overheat the run motor.

Technical Data

Input 117V 40Hz to 400Hz

Output 117V 60Hz crystal controlled, sine wave (SWC-60) or filtered square wave (SQC-60), variable frequency with optional controller unit

Output power: 60W for SWC-60, 40W for SQC-60

Installed in vented aluminum shielding box, dimensions 164 x 115 mm, height 55 mm (6 x 4.5 x 2.1 inches), mounting hole pattern 154 x 90 mm (6.06 x 3.54 inches).