Members knuckle_head Posted March 3, 2010 Members Share Posted March 3, 2010 I am designing a balanced circuit and am perplexed by a few things. Can a balanced tone pot share a capacitor or will I need one for each side? I am familiar with ceramic caps, but am finding all the Sprague stuff to be non-ceramic - is this an issue? I am doing all the balanced shaping/control before the transformer - is this bad? I bet I'll come up with one or two more..... Link to comment Share on other sites More sharing options...
Members knuckle_head Posted March 4, 2010 Author Members Share Posted March 4, 2010 bumpin - to keep it on page 1 Link to comment Share on other sites More sharing options...
Members slapthefunkyfour Posted March 4, 2010 Members Share Posted March 4, 2010 I'm gonna guess you need a cap for each side. I hope more people chime in on this because I'm also working on a special project. Link to comment Share on other sites More sharing options...
Members boseengineer Posted March 4, 2010 Members Share Posted March 4, 2010 What exactly do you mean by "balanced circuit"? Are you driving the caps in both polarities? That's fine as long as they are not electrolytic caps. Link to comment Share on other sites More sharing options...
Members knuckle_head Posted March 5, 2010 Author Members Share Posted March 5, 2010 Yes I'm driving the caps on both polarities - so polypropylene, polyester film or ceramic caps will do? Will I need one per polar side? Link to comment Share on other sites More sharing options...
Members boseengineer Posted March 5, 2010 Members Share Posted March 5, 2010 One is fine. As long as it's not tantal, electrolyte, or a supercap they work in equally in both polarities. Doesn't even matter which way you put them into the circuit. Link to comment Share on other sites More sharing options...
Members knuckle_head Posted March 6, 2010 Author Members Share Posted March 6, 2010 Thanks Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 6, 2010 Moderators Share Posted March 6, 2010 One is fine. As long as it's not tantal, electrolyte, or a supercap they work in equally in both polarities. Doesn't even matter which way you put them into the circuit. I've seen an increasing number of bipolar electrolytics. More dummy proof than before! Link to comment Share on other sites More sharing options...
Members Gregidon Posted March 6, 2010 Members Share Posted March 6, 2010 If you show a schematic i'll take a look at it for you Link to comment Share on other sites More sharing options...
Members knuckle_head Posted March 6, 2010 Author Members Share Posted March 6, 2010 I am manic, but refuse to solder myself in... Link to comment Share on other sites More sharing options...
Moderators isaac42 Posted March 6, 2010 Moderators Share Posted March 6, 2010 Depends on how you're going to do it, I suppose. Seems to me that there is no inherent ground side to a pickup, so you'd have +, -, and ground. The tone cap would be shorting the highs not to ground, but from + to -, so the highs wouldn't be going into the signal path to the amp. One cap should be fine. Link to comment Share on other sites More sharing options...
Members knuckle_head Posted March 6, 2010 Author Members Share Posted March 6, 2010 Depends on how you're going to do it, I suppose. Seems to me that there is no inherent ground side to a pickup, so you'd have +, -, and ground. The tone cap would be shorting the highs not to ground, but from + to -, so the highs wouldn't be going into the signal path to the amp. One cap should be fine. If a humbucker were wired to be balanced (+ - and ground) and share a common ground a single cap would work.... Link to comment Share on other sites More sharing options...
Moderators isaac42 Posted March 6, 2010 Moderators Share Posted March 6, 2010 If a humbucker were wired to be balanced (+ - and ground) and share a common ground a single cap would work.... I'd think so. However, a cap from each (+ and -) to ground would also work, but then you'd need a stacked pot as well, right? I'd try a single cap in series with a single pot wired as a rheostat, straight from + to -. Link to comment Share on other sites More sharing options...
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