Adjustments, Control functions and connections --- (2) – Dynavector PHA200 phono head amplifier User Manual

Page 3

��

� ��

��

1) Cartridge DC Resistance Selector

Three resistance/gain adjustments are available. Using
the rotary control on the front panel select the position
which matches the cartridge's DC resistance:

1. Low resistance: 4 - 8 ohms
2. Med resistance: 12- 24 ohms
3. High resistance: 30- 50 ohms

Note 1:

Input sensitivity and gain is determined mainly by the
cartridge DC resistance since the PHA-200 is a current
maximizing head amplifier. This means that the output
voltage of the PHA-200 varies according to the cartridge
resistance and the optimal output voltage is not achieved
unless the input resistance selector is set to match the
cartridge DC resistance.

(10) Power switch

When in the ON position, this switch allows the PHA200
to receive power, rendering the PHA200 operational as
shown by the power indicator at (2).

(11) AC power output socket

This socket should be connected to the AC power cable at
(8). Please ensure that the connection is properly locked
into position by turning the knurled outer socket of the
power cable to the right while pushing it in.

(12) AC power supply cable

This cable should be connected to the power source.
Please ensure that the operating voltage of the PHA200
matches the voltage in your area.

We recommend that this cable should be connected to the
"Switched AC outlet" of the pre-amplifier where such an
outlet is available.

Adjustments

The volume control of pre-amplifier
must be turned to minimum, when you
change the DC resistance selector.

Note 2:

When the loading impedance for the MM phono input of
the pre-amplifier is adjustable, you should set it to the
over "30K" ohms position. Operation below the "30K"
ohms level will result in a deterioration in low frequency
response.

2) N.B.

-Do not use the PHA-200 with a MM cartridge because the
PHA-200 is designed solely for MC cartridges.

-To avoid any hum problems, the power supply unit of the
PHA-200 should be located as far as away as practicable
from the main unit of the PHA-200.

-Do not connect any components e.g. transformers,
capacitors or resistors between the PHA-200 and the
cartridge since the design of PHA-200 circuit is quite unlike
that of other voltage amplifiers.

3) Positioning

Be sure to locate PHA-200 where:
- there is reasonable air circulation

Control Functions and Connections --- (2)