Vox AC30
Treble
Bass
Normal
& Top Boost
There are pictures of rebuilt AC30s all over the place, so no point in doing any more. Instead these are some tidied up schematics of the various versions with component values that are difficult to read on the factory originals.
IMPORTANT: These drawing and notes are provided for interest only and are not guaranteed to be accurate. Use at your own risk and discretion. The equipment shown contains lethal voltages and should only be worked on by people with suitable training and experience. Schematics and layouts are typical but will vary.
It's interesting (if your interested in that sort of thing) that the AC30 drawings were all updated in September 1964.
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OS/056 was issued on the 9th Sept 1964 as the TREBLE version.
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OS/057 was issued on the 11th Sept 1964 as the BASS version.
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OS/065 was up-issued to issue 4 on the 11th Sept 1964 when the word NORMAL was added to the title.
Even though they have lower drawing numbers than 065 (which is marked as being issued in 1960), there doesn't seem to be any reference to 056 or 057 before 1964. Work that one out. The drawings refer to the AC30.36, presumably 3 channels / 6 inputs. Later serial number plates just said AC30/6.
To make life easier, the power supply details and revision notes have been separated out onto a second sheet on each of the versions. The power indicator lamp doesn't appear on any of the original drawings unless I've missed it.
PRINTING
Wix images are in .webp format. To make a hard copy of a drawing :
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Left click when the magnifying glass icon appears and wait for the picture to clear.
(On a touch screen, tap on the image) -
Right click and 'save image as' to somewhere as a webp file.
(On a touch screen, touch and hold down to view the menu) -
Open the saved file with 'Photos' (Windows 10) or whatever app works for you.
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Use the print menu to print to A4 plain paper.
1. Vox AC30.36 TREBLE Version Schematic From OS/056
2. Vox AC30.36 BASS Version Schematic From OS/057
Vox AC30.36 NORMAL Version Schematic From OS/065
Vox AC30 TOP BOOST Mod From OS/010
The A/026 drawing referred to is the schematic for a four input version.
