iamthecheese
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Just a random thought...Is there something better than a wallwart the minimax can use...kinda like an M3 can use a STEPS or a TREAD?
Originally Posted by iamthecheese /img/forum/go_quote.gif Just a random thought...Is there something better than a wallwart the minimax can use...kinda like an M3 can use a STEPS or a TREAD? |
Originally Posted by tomb /img/forum/go_quote.gif Yes - what PScal said. The power supply on the MiniMAX is actually a modification of the STEPS, which itself was a modification of the standard LM317 application notes. The difference being that the MiniMAX was specifically tuned even further to achieve somewhere around a ~45uV ripple, when measured at the V+ and Gnd points, which essentially is the point of separation between the amp and the power supply. Just think of the walwart as the transformer in the power supply circuit - that's all it is. |
Originally Posted by iamthecheese /img/forum/go_quote.gif I was kinda of hoping to get rid of the wallwart...maybe a psu that would use a standard 110v cord like computer PSUs just to free up space on my UPS(its full and I have to keep switching around plugs). Is it even realistic to have an external transformer that would be in a lansing case with the same length and width to put under the minimax? Or would it mostly be a waste of time? |
Originally Posted by BoogieWoogie /img/forum/go_quote.gif I had the minimax bias at 17v 16v each tube then I tested it with a dac and the sound was great but I changed after to 13,4v and dint turn on until my dac came, now that it came the sound is to much distorted and metalic feeling, I changed back to 17 just to check and this effect was lessier. Is the my multimeter defected or is something wrong with minimax ? |
Originally Posted by tomb /img/forum/go_quote.gif I'm not sure I understand all of that, but if you're asking if a higher bias could make the tubes sound better - yes, that's entirely possible. However, you need to be careful that final biases are based on a warmed up amp. Bias will drop over the first hour or two. So, if you set it to 13.5 in the first few minutes, it may very well drop to 12 or less several minutes later. That could definitely sound bad. Or, your 17 or 16V bias (which is it?) could have dropped to 14 or 13.5, which means it might have been where it should've been. Also, tubes will change over time as the getter burns out remaining gases that may be in the tubes from sitting on the shelf for the last 50 years. So, a recheck is always in order if you want the very best sound. |
Originally Posted by BoogieWoogie /img/forum/go_quote.gif I don't think thats it ,Its been 3 hours on and I just checked its 13,50 13,68 , whats the max bias recommend so I can tune it be hear ? |
Originally Posted by the_equalizer /img/forum/go_quote.gif Great! I enjoy galleries a lot. Thanks TomB ! cheers! |
Originally Posted by timmyGCSE /img/forum/go_quote.gif how long do you reckon the latest round of kits will be in stock tom? I'll probably be looking to order a kit beginning of may. |
Also whats the shipping cost to the UK like? and with the wallwart..can I just use a UK equivelent that gives the same output? or just use a travel adapter.. |
Originally Posted by tomb /img/forum/go_quote.gif Beezar attempts to keep the MiniMAX kit in stock at all times.There are answers to both these questions, but I'm afraid you need to send me a PM or e-mail. It's not exactly proper to be conducting business in the thread (I'll get banned.). |