7
than the knob on the faceplate. The remote balance operates in 1dB
increments down to -15dB and then jumps to -90dB. This allows fine
adjustment where it is most typically needed yet facilitates the extinguishing
of the channel without going through all of the intermediate steps.
Headphone Jack
The RP-5 includes a tube based headphone amplifier that uses a ¼” (6.35 mm)
standard headphone jack. For performance reasons the jack does not include a
switch to break the audio signal. To mute the output from the preamp either
mute the preamp or turn off your power amp.
Phono Preamplifier
The RP-5 includes a high performance phono section that is suitable for the vast
majority of phono cartridges available today. It is user configurable and has
adjustments for gain, capacitance and resistive loading.
The RP-5 is shipped
with the gain set at 45 dB and the loading set at 47K.
This set up is appropriate
for most high output cartridges. Before removing the cover to make any loading
or gain adjustments, power off the RP-5 and let it drain off any voltages for at
least 30 minutes. Leave the RP-5 plugged into the wall during this time so that
the voltages can drain down properly. After the RP-5 has sat for at least 30
minutes disconnect the power cord from the wall or rear of the unit.
WARNING - This preamplifier uses voltages that could cause injury or
death. Never open the preamplifier while it is plugged in, and always
wait at least 30 minutes after turning the unit off before unplugging the
electrical cord and opening the unit.
Lethal
voltages can remain in the
electronics after the unit is unplugged.
Remove the 10 cover screws using a #2 Phillips screwdriver and pull off the
cover.
Setting the cartridge loading –
The cartridge loading switches are located on
the right hand side of the rear circuit board adjacent to the phono inputs (figure 3).
It is important to point out that the cartridge manufacturers recommended loading
should be considered as a starting point and not an absolute. Systems and
turntable setups vary significantly and if you want to get the most out of your
analog setup, take the time to find the settings that sound best in your system.
Phono capacitance
- There are two (red ) slide switches to add capacitance
(150pF) to the phono input. With the two switches in the down position there is
no added capacitance. When the switches are in the up position 150 pF
(picofarads) are added at the phono input. The RP-5 ships with these switches set
