Mark Levinson DUAL MONAURAL PREAMPLIFIER N26 - Manual (Page 15)

9
If you wish to vary the input capacitance of the phono option to
obtain the optimal value for a particular cartridge, a capacitor may
also be inserted into the optional load terminals (see "Terminating the
optional load" and "Making the internal adjustments").
Because the inherent input capacitance (all switches off) is in parallel
with the optional load terminals, use the following formula to calculate
the actual capacitor needed.
C = C
R
- C
T
- C
P
C = The capacitor value
C
R
= Recommended capacitance value
C
T
= Tonearm capacitance including leads
C
P
= Preamplifier inherent shunt capacitance
(Low-gain phono option = 100pf; high-gain phono option = 1000pf)
Note: We recommend high-quality polypropylene, polystyrene
or Teflon capacitors; see your Mark Levinson dealer.
The Nº26's optional balanced input module allows you to adjust the
input gain. If you wish to adjust the balanced input gain, see "Making
the internal adjustments;" refer to the table below for the proper switch
positions for each gain setting.
Switch –1.1dB –7.1dB
#1 Off On
#2 On Off
#3 Off On
#4 On Off
1. Make sure all associated equipment is disconnected from the AC
mains, and that the PLS-226 is disconnected from the AC mains.
Internal adjustments:
varying the input
capacitance
Internal adjustments:
adjusting the
balanced input gain
Balanced input
gain settings
Making the
internal adjustments
OFF
1 2 3 4
O
F
F
1 2 O
N
Phono gain
(right channel)
Cartridge loading OR
balanced input gain
(right channel)
Line gain
(left channel)
Phono gain
(left channel)
Cartridge loading OR
balanced input gain
(left channel)
Line gain
(right channel)
Optional load pins
Optional load pins
Nº26, internal adjustments