Little tech questions from your day

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benadrian wrote:jbar wrote:Does anyone know if an egc does weird things to a clip on tuner? I've started using a proper box tuner or even my phone and I've noticed that my clip tuner was tuning me almost a half step sharp on the unwound strings. It is nowhere near accurate.I have a TC Polytune clip-on that I use sometimes with my EGC and it works fine. Two things I can think of to mention.1. Make sure the floor tuner and the clip on tuner are set to the same reference pitch; A-440hz for example.2. Personally, I always tune with the 12 fret harmonic of the string, not the open string. It has more fundamental and far fewer overtones than hitting an open string. I do this no matter what tuner I'm using.Cheers!I downloaded the manual for the thing and futzed around with it for a while. Discovered 2 more buttons on the thing and discovered it was set to bass and the HZ were indeed set to something that was not 440. Now it works perfectly.Salut, all.

Little tech questions from your day

182
eliya wrote:I didn't open it up and it's not entirely clear from the flow-chart in the manual but I think so. Impedance balanced is when the "-" is going to ground through a resistor, R, and the "+" also has a resistor of value R in series? Because if so, then that's what the manual shows, I believe.If it's impedance balanced, then there isn't any actual signal on the - pin. You could output a test tone and see if there's any AC voltage on that pin with a multimeter.

Little tech questions from your day

183
TomWanderer wrote:I was trying to find a thread just about Tascam tape machine problems but I'll just leave this here...Does anyone have a recommendation for where I can send a Tascam 488 for repair? One of mine has a problem where the tape speed fluctuates. Sometimes it gets pitched up or down for a while and I have to stop and fast forward or rewind and it usually comes back, sometimes it's just momentary fluctuations. I have replaced the belt in the past year or so and I can confirm that the moving parts are clean and spinning free. I suspect that it's an electronic issue.Any advice would be appreciated.Yes:http://njfactoryservice.com/Russ is the Tascam expert. Spring for the proper repair and it'll be good as new.

Little tech questions from your day

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You could probably sweep a test tone up and down around the crossover point and see if it starts to disappear as the frequency gets close. If the drivers are same polarity it should be a relatively smooth transition; if they re opposite polarity you d get a notch around the crossover frequency.Crossovers are pretty much just parallel bandpass filters, splitting the full-range signal into band-limited signals of frequency ranges appropriate for the driver types.

Little tech questions from your day

187
ldopa\_chicago wrote:Dr Tony Balls wrote:Is there a name for a tool that is like a clamp but that expands instead of contracts? Something like a scissor jack but I dont need anything heavy duty or large. Or even like a small version of a shower curtain rod where you turn it to expand. HALP ME.Put some correct-hand threaded bolts on a turnbuckle? You can build your own to suit at the hardware store.BING BONG you win the prize! Thank you.

Little tech questions from your day

188
weezy wrote:I was going to post this in the craigslist brag thread but I got neck issues.I got this super clean mid '70s jazz bass for cheap because the neck was screwed up - broken truss rod and a little bowed. I took it to a good/experienced luthier and at first he thought it was going to be a matter of simply adding some washers, a new bullet and call it a day. Today he told me that it would need to be totally rebuilt/re-machined/etc, and he won't even do it because there's not enough meat on the neck as it is. He said he doesn't do heat treating anymore because eventually the neck reverts (it has a memory?).....I would still like to try salvaging it, somebody's aunt played this very little, and it came with the PU covers, case, etc. It looks like it's barely been played.Should I try sending it to warpedneck.com? Or should I just spend a few hundred on a new neck, or just part out everything else? Doesn't warpedneck just do heat presses? If so, it's not a great fix. Like your luthier said, It will most likely revert back to it's bowed state.

Little tech questions from your day

189
Does it matter if in a two-way speaker the tweeter and woofer are wired with the same polarity? Also, how can I check for that?A little background: I bought a pair of passive speakers on Reverb and when I got them they sounded terrible and phase-y. I contacted the seller and he said he replaced the woofers recently and must've flipped the wires by mistake. Fair enough. I open these jawns up and notice that in one speaker the red wire didn't go to the red terminal. I flip it and it all sounds good now. Question is, how can I tell other than by ear, that the woofer is wired with the same polarity as the tweeter?

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