3below

[quote name='ahpook' timestamp='1362351142' post='1998907'] if there's any articles you can't get hold of, and would like to see, do let me know. about time i annoyed them at the British Library again [/quote] Thanks, offer well received since my current employment provides lab rats but no access to journals etc Essential Tension.... be careful what you start

[quote name='Beer of the Bass' timestamp='1362349870' post='1998876'] It'd be very cool if your experiment was documented with audio files. You could perhaps coat a cheap piezo disc in epoxy to stop it from shorting and attach it to your plank... [/quote] Piezo is where I was going, but am also interested in magnetic pu, ie how does the (potential viscous) drag affect the magnetic response? showing a total lack of knowledge I also wonder about what frequency is propagated in the medium (water). Will it be the same as the string vibration? This is not my branch of Physics so I may be asking very simplistic uniformed questions about well understood effects. Time for a lit survey I think. I had not thought of audio files, however that would be straightforward since the data would be voltage - time to obtain frequencies. The fun bit is it is a simple experiment to execute and provides good data to answer the question. Before anyone asks, I can access a swimming pool so boundary reflections can be negated lol.

[url="http://basschat.co.uk/user/1234-ahpook/"]ahpook[/url] [color=#222222]It Is a long time since I have been called a star [/color] [color=#222222] It is a phrase I use on my students, showing my age.[/color] [size=4]The initial question is a really good one, and not readily soluble to mere mortals ( ie sub Einstein abilty) or me without experimental data. It is the sort of practical real world Physics I enjoy. Let's build a test rig and find out... Will there be a significant difference between E and G string due to mass/unit length and diameter? etc, etc[/size] [size=4]Lastly I also have a beard ! They are essential for all sorts of reasons [/size]

A tough call in life but you have your reasons. Life will move on, other music opportunities will appear that can fit your circumstances. Keep in touch with lads in band, give support as best you can. What goes round comes round.

Speaking as an engineer and physicist I think I will have to get some students (lab rats) building the test rig. The problem is complex and of interest. Plywood, old strings, machine head and bath to be pressed into service. Watch this space.

[quote name='BigRedX' timestamp='1362236360' post='1997374'] It could just as easily be on the inside 10 turns. [/quote] Agree, that what was I was trying to say with which end to remove turns from. You said it more clearly - inside or outside windings. Ask the guy can he rewind without original coil - he will have some originals to work from. If he has, you now have nothing to lose and £20 to gain (other than time, faff and possibly varnish everywhere). If he can rewind try the DIY first. Nothing to lose, beer money to save...

Very unlucky by the sound of it, probably a short. However it can't be far in, say 6K ohms and 7500 turns for whole pickup. This gives about 1 ohm per turn. Are you brave? You might get lucky by removing say 10 turns - problem is which end to remove 5 turns from. The danger of this approach is that you may destroy it forever and it may not fix the issue. It depends on how the pickup coil was wound. It may not be possible to remove the offending wire to remove the short. Another desperate measures method - am not sure if this will work. Polyurethane varnish (spirit based), dilute until incredibly thin. Immerse pickup coil, leave several days. Remove, allow to dry. You might get lucky and varnish gets into the 'short'. Good luck

If the main body of the coil is still in its paper / plastic wrap (I forget what, was 1975 or so when I took mine apart to look inside) then the coil should be ok. You might have a short against the metal case. Take it apart, remove the coil from the magnets (it is very simple construction if an original one). Try measuring resistance. If in the K ohm range (as mentioned above) the coil is ok. If the coil is ok when outside the case, coat the wires in something like varnish or nail varnish. This will hopefully sort it.

Play it, see what you think, is it worth the money. I would also suggest look at Yamaha pacificas, seriously good value for the money.

Basschat is great, I have bought a fair bit of kit here. I have sold one set of kit and gave a donation (no email though - but may have been in early days) . I would be happy to subscribe. What are the costs of hosting and running site? what bandwidth are we using? should this data be available in the community?

Great job, these cabs are built to last from high quality materials. Will last another lifetime now.

As a physicist I would resort to the time honoured method... suck it and see. With experimental evidence of the real situation we can see which effects dominate. . Ahpook - how [color=#282828][font=helvetica, arial, sans-serif][size=4]very, very hand-wavingly were you? A drop of 0.0001 Hz seems low from intuition - which can be very wrong. You are bang on about the potential complexity with possible transition from laminar to turbulent flow, We could also see cavitation as well. [/size][/font][/color][size=4]An interesting problem, good for final year degree project or a more qualitative A level investigation I guess.[/size]

UK mains transformer should not make any difference providing it is right specification - giving correct HT (B+) etc.

The offsetting makes cabinet shorter in vertical dimension and wider in horizontal. Cones closer together vertically, further apart horizontally. I will decline making comments on sonic performance, there are better qualified and experienced people who can.

What will the app do?

[quote name='paulconnolly' timestamp='1360872403' post='1977796'] It was fine. I'm still crap [/quote] A man who knows my bass playing - am still amazed what a difference 2.5mm makes (no references from other half here please). However am gradually getting used to narrower spacing. As others have mentioned - just put the time in.