Is it a 'fun' instrument, or a versatile band accessory?
Stylophone Model 350S
The model 350S was the 'big brother' of
the standard Stylophones, and although
working on the same basic principal,
provided a much wider range of effects
and sounds. What's more, it had two styli!.
There is no doubt that the sound quality
and versatility of this instrument was, and
still is, pretty impressive. Even today,
when played through a decent amplifier
and 'beefy' speaker set-up, the results can
be quite amazing.
The reason is that a number of different voice and instrument affects could be used at the same time, as opposed to the
single voice of the standard model. One of the most interesting aspects of the effects was the 'Photo Control' on the
effects panel. This really is great fun to play with, and can give fantastic effect while playing.
It had the wood finish speaker grill, as seen earlier on some of the 'standards', and the same keyboard set-up, although
this unit carried 44 keys as opposed to the usual 20.
Power consumption was much higher too, with 2 x large PP9 9v batteries needed to operate the instrument.
This made the 350S quite a heavy piece of equipment in comparison to its' smaller 'pocket-sized' counterpart.
Considerably larger than the standards, the 350S was a progression from a simple fun novelty to a seemingly fully
fledged musical instrument. It was still basically a single note unit, despite the second stylus.

The left hand stylus was used as a 'reiteration'
implement, and various effects could be made
using both styli in tandem.
All the effects were available on the top of the
panel; a tuning wheel was situated to the right
of the voice rocker switches. Effects
available to the user included Waa Waa,
Vibrato, Reiteration, Decay, Woodwind,
Brass,
and Strings. The speed of the vibrato
and the volume level could be controlled by
the Photo Control.
This was in the form of a light sensitive photo-
diode, covered with a plastic lens, located at
the left of the panel. When used in adequate
light, the hand could be passed over, or
cupped around the sensor, allowing more, or
less light to reach the sensor as a note was
played. This would vary the volume, or the
vibrato effect, whichever switch had been
selected from the control panel. Someone
watching you play while using this feature
would probably question your sanity, as it
does look very strange to say the least!. The
effect however, is quite remarkable. This
does of course mean you could not use the
second stylus at the same time, with both
hands in use, but more fun could be had using
this little device than the second stylus
anyway.
The main rotary volume
control, located just below
the 'photo control' sensor.
The sensor is just
visible below the
plastic window.
Adequate lighting
was needed to gain
the full effect from
this simple, but very
effective device.
'Rocker' switches along the top of the 350S
could be placed in three different positions to
get the required voice or effect .
The 'flat' position is 'Off'.
The white dial seen here is the 'tuning
control' adjuster.
As well as being the perfect 'home' instrument for the all the family to enjoy, it was also marketed as a band
instrument in its' own right, as some of the colour illustrations from the instruction manual suggest. How many
bands that actually did incorporate the 350S can only be guessed at, but there is no doubt it could have had a
place as an additional piece in certain circumstances, and given very favourable results.
Although both styli are exactly
the same as seen on the smaller
standards, the leads are longer
to accommodate the wider
keyboard of the 350S.
The familiar Stylophone logo,
painted silver as on the standards.
Three accessory
sockets on the left
side the 350S case.
350S
It's very important to note however, that what is regarded to be the totally unique sound of the pocket version will not
be found on the 350s. Its' sound is quite different - although similar in keyboard layout etc - it drifts from what the
'Stylophone-Sound' and 'Rolf Harris era' is all about.
You won't find anything close to the original 'Bowie ~ Space Oddity' sound on this instrument.
Reliability of the 350S

Generally, there are just a couple of areas where the 350S may need attention.
The first is the rocker switches - which can cause crackling and intermittent tonal variations. This can be put right in most
cases, but be prepared for a BIG strip-down, with 30+ screws needing to be removed to get at the problem!. Great
care has to be taken if attempting this, as other components could be damaged in the process. It may be better to put up
with these annoyances than risk any damage.

The other area however, is of much greater concern...
The circuit board carries an IC which controls sound output, and this component (long since obsolete) is the single- most
likely cause
of the 350S to break down. If this happens -and it often does after all these years - the unit will only be
heard if played through a separate amplifier, if at all. A tell-tale sign of this fault is when the stylus is applied to the
keyboard, only a very feint sound is heard (if even audible at all), which fades away rapidly. This happens no matter
which switch combination is used. Even with the volume control turned up to max, the sound will still be very low - then
quickly fall away. The user will then be left with a 'dead' 350S.

The fact is that this component can fail at any time on these 30 year-old instruments, and it is most unlikely you will be
able to get the 350S repaired at your local electronic service shop. Even if it were possible, it would be a very expensive
affair. These components are as rare as the proverbial rocking horse droppings, and to our knowledge, the only people
who now have these IC's are the Sales Center at stylophone.com.

Unfortunately, due to very limited numbers, they are not available for general sale. They are instead used as a standard
service replacement in their own reconditioned 350S units prior to sale, as a long-term guarantee to their own customers.