Vox_AC15_mods 电路图 维修原理图.pdf

220p 500p .0047F 630v .0022F 630v .0015 to VOL pot to board Vox AC-15 Modifications More Brilliance Replace the Brilliance switch with this 2 pole 6 position switch for more tone options. The extreme positions of this switch still maintain the original tone options. STBY 250 Double Pole/3 Position Switch Off Both poles are open Center Top pole is closed On Both poles are closed B+ Standby Plus!This 3 position Standby switch allows you to choose between full B+ and a lower B+. T S G T S G Jump NORVIB Separate DPDT Jump!This mod allows you to easily jump the channels. Delta Tremolo/Vibrato Replace the original internal Depth preset and 3 position Speed switch with a front panel DEPTH pot (1M-A pot with push/pull switch) and a Speed pot for more control of the Trem/Vib effects. The switch is used to add another capacitor in parallel with one of the oscillator caps to lower the LFO frequency. The .022F results in a very slow speed for some nice swampy Mississippi delta sounds. 220pF 500pF .0015F .0022F .0047F 6 5 4 3 2 1 C CW CCW 2 Pole 6 Position MBB 6 5 3 2 1 CW CCW 4 C NOTE! All terminals for half the switch are jumpered together and just used as a tie point for the caps. 收音机爱好者资料库 Ra d i o Fa n s .CN T S G IN Channel Select Switch to VIB preamp 132 64 to NOR preamp 5 The switch is a C&K 7211 ON-ON-ON. It is not a standard DPDT switch. (Alternate to Jump mod) 收音机爱好者资料库 Ra d i o Fa n s .CN