JSA Effects "Harmonic Trem V2 Prototype" - a unique and original design, mosfet based, tremolo with sweepable phase for a range of different harmonic tremolo sounds
Remember when Harmonic Tremolo was all the rage thanks to TPS? Well, suddenly an archaic design concept was being requested by everyone with access to YouTube and a guitar. However, many of those old designs were built in to tube amps, and used tube stages, resulting in a very specific tone and, more importantly, feel. So how do you best approach capturing that as a pedal?
To start with you use MOSFET transistors as the amplifying stages. Sure they're not the same as running a tube at 240v, but they're essentially the next best thing
Volume modulation is easy, but Harmonic Trem requires two lines modulating, with one only modulating the very high frequencies to cause phase cancellation when mixed back with the full range modulated signal. However, it quickly transpired that you could add a volume control just on the high frequency line, allowing you to blend in as much of the phase cancelling signal as you desired to the normal modulated signal and, suddenly, you had an incredibly versatile tremolo! With the "phase" control fully left you get a standard tremolo effect, and turning the phase control clockwise blends in more and more of the phase cancelled signal so that, when fully right, you have maximum Harmonic Trem
Because of the nature of the circuit, the clean line is also boosted, using the same kind of MOSFET amplifier used throughout, so that there is plenty of output signal, and many users have exclaimed at how wonderful the pedal is just as a clean boost if you have the "Mix" control fully left
Unlike the production version, this prototype has an always on rate led, showing you the speed and depth of the tremolo in real time
This pedal was hand built by one-man-and-his-cat in the heart of the UK, housed in a 1590bs enclosure with top mounted jacks (the same small footprint of a EHX nano pedal, but slightly deeper than an EQD/Walrus pedal), and was one of a small handful of prototypes that went out to testers, so grab an utterly unique pedal, for a bargain price, while you have the chance
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Great chance to pick up a nice 2nd Hand JSA Effects Harmonic Trem Pedal
JSA Effects Harmonic Trem Pedal - 2nd Hand Details:
- Case/Box: None
- Overall Condition: Good
This is a previously loved item and as such may have signs of use. Please note that whilst we do our best to picture our 2nd hand and Ex demo items in detail it is not always possible to picture all marks, scratches, and blemishes on these items. This may be due to the reflective nature of the item or the finish. We do try to give a broad indication of the general condition in the description, but this is just a guide. If you are looking for something in extremely good condition it is advised to call for a detailed talk through of the item before ordering.
If you have any questions about this item or would like to know more about it, please feel free to contact us with any specific questions and a member of our sales staff will get back to you straight away.
This is a 2nd hand item and may not come with all originally included items and original accessories or software. Please refer to the pictures for all included items. All our 2nd hand items are fully checked and setup in advance of shipping. We package very well and usually ship next working day unless the item is marked Collection Only. If the item is marked as Collection Only you can still reserve with a deposit using our reserve and collect facility at checkout or by contacting us.
Sell Your Gear
As well as buying 2nd Hand items for cash we are also happy to take items as part exchange against all New, Ex Demo or 2nd hand. So, if you have anything to part exchange then please feel free to contact us through the "sell your gear" link above or email us and we will come back with a quote.
