System J Synthesizers

Various interfaces, cables, parts and information for analogue synthesists...

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Please read the Payment & Shipping page before placing an order. There is also important information for customers ordering from ITALY on this page.

If you are ordering from outside the U.K please remember to choose the International Shipping option during the PayPal checkout procedure. This is important as I will no longer process orders with the incorrect shipping selection.

S'il vous plaît lire avant d'acheter. Si vous achetez de l'extérieur de l'U.K s'il vous plaît n'oubliez pas de choisir "International Shipping (expédition internationale)" lors de la caisse PayPal.

Si va a comprar desde fuera del Reino Unido, recuerde elegir "envío internacional" durante el pago de Paypal.

Se acquisti al di fuori del Regno Unito, ricorda di scegliere "spedizione internazionale" durante il checkout paypal.

Vor dem kauf lesen Sie bitte.


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*NEW* - TC-X Universal Trigger Interface


The TC-X combines the features of both the TC-1 and TC-2 in one small box. It will convert V-Trig to S-Trig or the opposite S-Trig to V-Trig. It will convert short triggers and longer gate signals and is compatible with most vintage synthesizers from Roland, Korg, Moog, ARP, Sequential Circuits, Oberheim, Yamaha and many others. Also suitable for interfacing vintage synths with more modern modular gear.

The TC-X requires a DC power supply in the range of 5-12v, details the same as TC-2. More info here.

*NEW* - Boss DR-55 DC Input


6v DC voltage regulator board allowing you to run your Boss DR-55 from a suitable DC power supply such as Boss PSA or similar adapter with negative tip polarity. Internal or external mounting, permanent or temporary. Can replace original AA battery operation. Optional 3v lithium back-up battery for memory retention. No circuit modification needed. Details here.

*NEW* - GA-1 Gate Amplifier


If you need to boost 5v gate or trigger signals to 9v or 12v for your vintage analogue synths then the GA-1 Gate Amp may be of interest. More info here.

TC-1 and TC-2 Trigger Interfaces


TC-1 and TC-2 are back in stock. Useful trigger converters for V-Trig and S-Trig gear. More info here

*NEW* - Pratt Read keyboard bushings - Moog, ARP, Sequential Circuits etc


If your ARP Odyssey or Minimoog keyboard is noisy, uneven or sticky - this might be of interest...

Available in sets of 3, 4 or 5 octaves - suitable for many vintage synths including ARP Odyssey, Axxe, 2600 keyboards, Minimoog, Micromoog, Multimoog etc, Sequential Circuits Prophet 5, Pro-One etc. NOW BACK IN STOCK.

Click here for details

Roland Pitch Bender


I have some replacement Roland pitch benders available - used on many synths between 1978 and 1982 including SH-1, SH-2, SH-09, Promars, Jupiter 4, Jupiter 6, Jupiter 8, Juno 6, Juno 60, System 100m keyboards... Details here

Roland System 100m 6 pin and 8 pin DIN cables - *BACK IN STOCK*


8 pin DIN cable for connecting 100m modules to the 190 & 191J cabinets. Details here



6 pin DIN cable for connecting 100m keyboards to 190 & 191J cabinets and inter-connection between cabinets. Details here