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Mottlefeeder
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A box that includes different size holes for the battery terminals would tick the boxed for me - no chance of inserting a battery rhe wrong way round and damaging the circuit. David
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The IEM (in ear monitors) Bible thread
Mottlefeeder replied to EBS_freak's topic in Accessories and Misc
That one was two shielded balanced pair cables with a common figure-8 sheath - presumably someone still makes it. David -
The IEM (in ear monitors) Bible thread
Mottlefeeder replied to EBS_freak's topic in Accessories and Misc
As a compromise, Studiospares did a figure-8 stereo microphone cable - two balanced cables joined together. Haven't found it yet on the G4M site... David -
Taking a back-up desk (and other kit) to gigs
Mottlefeeder replied to Al Krow's topic in PA set up and use
The BL provides a Yamaha mixer/amp and PA speakers, but we often busk using event-supplied generators. I carry a mixer which can be battery powered, and a battery powered rig so we can continue with my mixer & amp & his speakers if the power fails (typically the generator runs out of fuel). David -
The IEM (in ear monitors) Bible thread
Mottlefeeder replied to EBS_freak's topic in Accessories and Misc
I've been using stereo microphone cable to do this for several years - it works well for active basses with electronics to drive the signal through the cable, but passive basses may have some loss of high frequency contect due to the cable capacitance. David -
Interesting history of tuning here. https://jakubmarian.com/the-432-hz-vs-440-hz-conspiracy-theory/ David
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Behringer xenyx 304 - EQ on bass/line in, and also on the stereo line in/PC out. This makes it really easy to minimise the bass on the track you are learning, regardless of whether it comes from an external MP3 player or from the PC. David
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I think the issue with people practicing is that you might play through the same phrase many times, and that is what winds people up. David
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OK - your back-up head (Elf or similar?) will probably have a jack socket output so you would need a jack plug to speakon to connect to the extension speaker and a speakon to jack socket to connect that to the combo cab. That would also give you the option of connecting the combo amp to the extension speaker if the combo speaker was suspect. David
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Yes. Been there, done that - I once managed to connect my main amplifier output to my back-up amplifier, and only one survived. Your option of making your back-up amp have the same connection as the combo amp is the safest option to prevent two amps being connected at the same time. David
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I built a kit which used 'Overlord of Music' hardware. It was fine for EADG, but useless for BEAD tuning as the string clamp bends the string through 90 degrees, and the B string would not take that. I ended up making an in-line clamp to get round the problem David
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I'm trying to squeeze as much bass out of a small cab as I can, and the constraints I have accepted are that I need the steeper filter to reduce the port velocities. So my filter does not need to be variable, which makes things easier. With regard to digital options, the last digital circuit I designed was the logic behind a discharge-then-charge battery charger. I think it had eight gates in it. Also, learning new languages has never been easy for me, so I'm pretty much 100% anogue. I'll check out LTspice and see how steep the learning curve will be. David
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It's funny how when you only have a hammer, every problem starts to look like a nail! Thanks for the info - I'll check it out. (And thanks for correcting my typo which I only noticed last night) David
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Feeding WinISD'a filter calculator with the cookbook recommended Q per section for a two-section filter, I get two 12dB filters to give the same response as a 24dB filter. Unfortunately I cannot model the Rod Elliott twin 18dB filter design as WinISD only allows a triple 12dB design. But that gives me a design that I can work with. David
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My understanding is that the Q defines the sharpness of the knee, and that also affects the likelihood of ripple. The Butterworth 'design' maximises the range of the flat response, and the WinISD Butterworth graphs show no ripple. Chapter 16 of the op-amp cookbook @tauzero linked to does show graphs for various filter configurations. David
