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Vintage threads from the first ten years
Anyone worked on Vox SS Conqueror ?
 7/21/2005 6:52 PM |
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| Pete | Anyone worked on Vox SS Conqueror ? I have a late/mid Sixties Vox conqueror I am having some trouble with. The schematics on the vox and other sites apart from being impossible to read values from do not accurately reflect the actual circuit. The most noticable I can recall is a 100 ohm resistor to ground from the bass pot in the schematic whereas with the actual unit the resistor is across the pot from the wiper. The main problem is the bright or distortion channel.Its impossible to get a decent looking sine wave through it as compared to the normal channel.When using a guitar through it the normal channel sounds full bodied and surprisingly warm but the distortion channel sounds thinish and gutless. Have removed all the transistors and individually tested them and rearranged them according to gain (the originals have no number only a white dot) I assume they are BC 109's. Have checked the electros with an ESR meter (very handy)and replaced ones that are too far out.. or dont show any reading at all. Being mainly a "valve guy" I was pleasently surprised at the sound this amp is capable of. I can vaguely remember a local band buying a pair of ss vox's in the 60's and having endless trouble with blowing up the output section due to instabilitys but have read an article detailing lack of zobel filter etc. Does anyone know of an accurate schematic or have any experience with these amps ? It does work except for the reverb which utilises 2 phonograph crystal pickups either end of the reverb spring and one of the pu's is not functioning.It looks like something cobbled together by the props dept of the BBC for the early Dr Who series complete with rubber band suspension! Any help appreciated. Cheers |
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| Ray Ivers Pete, |