oreomu.blogg.se - Vox ac10 vs ac10c1

The AC10C1 utilized solid state diodes for power supply rectification, eliminating the need for the EZ81 rectifier tube from the original 1960 AC-10 design. The output stage of the AC10C1 was powered by two EL84 tubes, just like the design of the 1960 JMI AC-10. The AC10C1 preamp also included a digital reverb circuit that was designed on to a small separate PC board (see photo above). A second 12AX7 (V3) was the phase inverter. One half of V2 served as an preamp gain stage while the second half powered the treble and bass controls of the Top Boost tone control stack. The signal path for the AC10C1 started with a 12AX7 (V2) tube. In addition to the Top Boost tone control circuit and gain control, the AC10C1 also included reverb. The Vox AC10C1 was a single input, single channel design with four tubes. The AC-10 and AC-15 power amp stages were so close in design that it would not be unreasonable to conclude that both amps should have been rated at 15 to 17 watts RMS. Both had two EL84 output tubes, similar power amp circuitry and similar B+ plate voltages. The AC-10 only had a simple passive "Tone" control to attenuate the treble response.Ī close comparison of the JMI AC-10 schematic (OS/008) and JMI AC-15 schematic (OA/031) reveals that the AC-10 and AC-15 shared a nearly identical output stage.

The 1960 design for the JMI AC-10 did not include separate treble and bass controls, sometimes called "Top Boost" in Vox parlance. The first channel was powered by the EF86 tube, the second channel and the tremolo circuit was powered by the ECF86. The amp featured two inputs, two channels, tremolo and a tone control.

The JMI Vox AC-10 was an open backed, hand wired amp that featured six tubes: an EF86, ECF82, ECC83 (12AX7), two EL84 output tubes and an EZ81 rectifier tube. Let's compare the original AC-10 circuit, designed in 1960, to the 2015 model. Years after the original JMI AC-10 made its final appearance in the May 1966 Vox price list.