Roland TB-303 Manuel d'utilisateur télécharger pdf (Page 23)

The dual 10 ohm output circuit with the original, large, 1000uf bypass capacitor is

capable of driving headphones hard, including headphones with impedances as low as 8

to 16 ohms. If you want to drive a small loudspeaker, please use a stereo socket and tie

both the ring and the tip of your plug together, with that driving one terminal of the

speaker, with the other terminal going to the ground of the plug.

In general, do not plug a mono 3.5mm plug into this socket, because that will short the

ring connection to ground, causing the Headphone Amplifier to work hard driving its

signal into a 10 ohm load, for no good purpose. If you want to use a 3.5mm mono socket

to get a second audio out from the machine, please plug it in half-way, so the tip of the

plug touches the ring connection of the socket.

Optional Switch for Audio In to Filter

I can install an extra three position toggleswitch, usually located between the Tempo and

Track/Pattern Group Selector knobs, to enable or disable the Audio In to Filter signal,

which is put into the machine via the old Mix In socket on the left of the rear panel.

It has three positions:

Position Audio In to Filter

enabled

Physical switch action.

Up Yes Stays in this position

Middle No Stays in this position

Down Yes Spring return to middle position

Optional Quicksilver 303

I can install the Quicksilver 303 CPU replacement system in a Devil Fish. This replaces

the TB-303’s CPU and provides new sequencing capabilities, with MIDI In and Out via

DIN MIDI connections and via a USB socket. I install a USB isolator for this socket.

If I install this, there can be no 32 Bank Memory system. There is no battery backed up

memory, so there is no need for an internal lithium battery or for installing C-cell

batteries, unless the batteries are needed to run the machine without a power adaptor.

The Quicksilver 303 microcontroller has its own non-volatile memory.

There is a separate manual to describe the particulars of the Devil Fish with the

Quicksilver 303. Please see the page: http://www.firstpr.com.au/rwi/dfish/midi-options/

for further details.

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Roland TB-303 Manuel d'utilisateur Page 23