Question about Music
Purchased off ebay, had no tubes. purchased new tubes.
The adjustment method varies from amp maker to amp maker. if you're unfamiliar with the procedure, you're better off to take it to the shop and get it done right. If you really want to do it your self, VHT has a meter they sell for about $100 online so you can see where you're at and then you adjust the bias trim pot inside your amp to balance them out to where you want them.
But again, you're best off leaving it to a pro.
Posted on Nov 23, 2014
Testimonial: "I thought I had entered the amp's description. It is a line 6 Spider Valve HD 100 Mk1 Bogner. There are no bias pots, but Molex connectors without any jumpers. Locating a schematic for this is proving to be impossible."
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Posted on Jan 02, 2017
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