In order to work properly, the input and gain characteristics
of your PPA20 have to be matched to your cartridge.
The PPA20 has a choice of three predefined settings tailored to
the most common types of cartridge (special cases are discussed
on page 25).
The three cartridge settings on the PPA20 are
mm
,
mc x 10
and
mc x 30
. The
mm
setting has the lowest gain and is suitable for
high-output cartridges. The
mm
setting also selects the correct
input characteristics for a typical moving magnet cartridge.
The
mc x 10
and
mc x 30
settings select the correct input
characteristics for a typical moving coil cartridge. The
mc x 10
setting gives a gain of 10 times the gain on
mm
and is most
suitable for medium-output cartridges. The
mc x 30
setting has
a gain of 30 times the gain on
mm
and is most suitable for low-
output cartridges.
The cartridge selector button
mc/mm
allows you to select the
cartridge type and gain. The cartridge type and gain setting
you have selected is shown by an LED on the front panel marked
mc x 30
,
mc x 10
or
mm
. Pressing the
mc
/
mm
button steps
through the following sequence,
mc x 30
,
mc x 10
,
mm
,
mc x 10
and back to
mc x 30
(1)
.
You can have a different cartridge type and gain on each input.
Changing the input will return you to your chosen cartridge type
for that input
(2)
.
types of
cartridge
selecting the
cartridge type
14
15
selecting the cartridge type
selecting the cartridge type
mc/mm
mc x 30
mc x 10
mm
1. Because of the large difference in gain, the PPA20 passes through
mc x 10
when
switching from
mm
to
mc x 30
and back
2. The PPA20 remembers the cartridge type and gain for each input even when
power is disconnected
GRA00046.1-[CA]PPA20 13/03/01 11:31 Page 15
