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Re: Powerampdist. in guitaramp

My Musicman HD130 guitaramp has 270 AC for the powertubes. And voltagedoubling with 2 diodes and two 100uF/450V caps in series. That gives 350 VDC to the screengrids and 700 VDC to the anodes. Isn´t that called halfwawerectification? As I wrote earlier I have 25mA current through each EL 34. (EH). Problem: crossoverdistortion. Wonder if I should change to full rectif. with 4 diodes in a bridge ? 270 AC will give at least 385VDC ? Can I use this voltage instead to the anodes ? It will also mean that no caps have to be in series so total uF for filtering will become two times the present value. With perhaps 50mA current through each tube? In that case, can I expect less crossoverdist? Please give me an advice what to do. This amp must be able to play louder without dist. than it does now . Regards Stewen


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  • Re: Powerampdist. in guitaramp - Stewen 09:20:09 03/24/06 (0)


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