Construction
After having done many researches, a long lasting trial
period and according to our experience, preamplifier tube
6N1P was chosen as the best solution for few ordered custom
made devices. Sound tests revealed us possibility of introduction
Ni-Cd batteries (1.2 Volt) into cathode rod for obtaining
stabilization of bias. The usage of battery enables purity
of sound, larger frequency response and maximum gain. Anode
connection consists of noninductive wire wound resistor manufactured
by RCD. Capacitors on the signal path are WIMA MKP-10. Potentiometer
of volume control is 2 X 250 K Ohms, produced by ALPS. To
avoid discussion about the effects of wire length to the way
of signal PCB is directly attached to RCA jacks; all components
are on the double side PCB made out of epoxy board. The signal
is transmitted from the anode. |
