![]() ![]() The original design for the JMI AC-15 B+ power supply included a EZ81 full wave rectifier tube and a choke. ![]() In additional to the B+ (high voltage) and a filament heater winding, the AC15C1 power transformer included an additional secondary winding to supply the solid state reverb and tremolo circuits. While the primary winding of the AC15C1 power transformer varied to accommodate regional mains voltages, all four of the transformers listed above had identical secondary windings. The following chart details the part numbers of those power transformers. Vox produced four versions of the AC15C1 chassis, each equipped with a power transformer that accommodated regional differences in mains AC voltage. The Tube PCB was mounted to the five tube sockets and included most of the power supply components.įour additional small printed circuit boards mounted the input jacks, output jacks, power switch and power indicator LED. The "Tube PCB" was located on the inside bottom of the chassis. The Main PCB was mounted vertically against the back of the chassis. The larger of these two boards was the "Main PCB." The Main PCB included the controls plus the Top Boost, reverb and tremolo circuitry. ![]() Most of the AC15C1 circuitry was designed onto one of two dual sided printed circuit boards (PCB). This allowed the chassis to act as a heat sink for the tube sockets. While an earlier version of the AC-15 had tube sockets that were mounted directly to the main PC board, the tube sockets for the AC15C1 were fastened to the chassis. The chassis bolted to the amplifier cabinet with four large machine screws. The control panel nomenclature was silk screened directly to the top of the chassis. The top, bottom and inside of the chassis were painted in semi-gloss black paint. The AC15C1 steel chassis had a "C" shaped cross section. It included spring reverb, tremolo and output jacks for extension speakers. The AC15C1 was powered by three 12AX7 and two EL84 tubes. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |