Mr. Foxen

Trace already did stuff with front resonant chamber:

Bear in mind in that image, the hole is about one wavelength across.

[quote name='4 Strings' post='1318340' date='Jul 27 2011, 03:08 PM']Here's a photo of the tidal movement through a restriction from above. Is this what the hole does (seems the opposite of the beam blocker)?[/quote] The foam is transparent to big waves, and makes much more mess, because small waves get through, but later or in a different direction and they bounce around the cells in the foam.and all sorts of other stuff depending on frequency. Plus more fun from the inside edge of the hole.

[quote name='BigRedX' post='1318001' date='Jul 27 2011, 10:07 AM']Bridges where the intonation adjustment isn't done by winding the saddle backwards and forwards on screw but requires you to move it physically by hand. It's far more cumbersome, time consuming and potentially less accurate to set. However I see a lot of designs using this method so I'm thinking there must me a good reason for it from tone PoV to make it worthwhile because it certainly isn't ergonomic. Would any of the Basschat resident luthiers care to comment?[/quote] Those ones tend to let you fully lock the saddle in place, rather than wibbling about on a spring. You could have a screw as well, but more parts for same functionality.

Know how to work a multimeter? [url="http://www.hobby-hour.com/electronics/resistorcalculator.php"]Usning this handy resistor calculator[/url] you can test the resistors relating to that valve are in spec, in case they are the issue.

Find some lead solder. Not lead solder is all round rubbish.

[quote name='ShergoldSnickers' post='1317189' date='Jul 26 2011, 03:26 PM']Analogy? Take a torch and a sheet of glass. Clear glass gives a focused beam from the torch, as the beam is relatively unaffected. Frost the glass however and you'll get scattering, widening the beam. I'm guessing this is something like?[/quote] Problem is, see the Dark Side of the Moon cover, different frequencies/colours scatter more than others.

Neck is from a copy, so isn't even as complete as it looks.

I've already read it, and the dissection of it with various engineers, including BFM. Just because something works doesn't mean that the explanation of why it works is true.

[quote name='stevie' post='1316888' date='Jul 26 2011, 12:24 PM']The hole in the foam is an integral part of the design. If you block it up with a beam blocker it won't work properly. Have you read the description?[/quote] Think the point is it doesn't work the way you think it works.

I'm at a pretty uncreative time at the moment, everything is going pretty smooth, so I don't have much I wish to express. So I work on my technique, getting various bits I've picked up to integrate into my playing. When I do wanna to say something, maybe they'll be useful.

[quote name='Johnston' post='1316752' date='Jul 26 2011, 10:46 AM']Headless acoustic. That sounds sweet .[/quote] Yeah, good camping bass. But at this point, I'd strip it and ebay it in separate parts.

[quote name='Beedster' post='1316479' date='Jul 25 2011, 11:42 PM']That's lovely, my only worry is that it might be a little underpowered. Does it do loud and clean?[/quote] If they don't, something is wrong. Usually that something is an ECC83 in the phase splitter position which makes them do loud and dirty. Should be an ECC81, then it is clean, and loud. 6 EL34 is 120w with a lot of headroom.

A lot of cocking around with valves, and this now all works, and isn't stupidly noisy, still quite noisy though, gonna investigate the noise reduction mods, starting with the least invasive. Working on another one now. Further updates on other amps will be on this blog I started for the purpose, will be posts about other gear work I do and whatever I get my hands on, as well as stuff I'm selling: [url="http://ampstack.wordpress.com/"]http://ampstack.wordpress.com/[/url] Eventually I'll be arsed to put appropriate decorations on here.

That only works for one speaker, this is all about aligning multiple speakers. Really the right way to do multiple speakers is low pass all but one, then maybe donut that, so you have the low end sensitivity of multiple speakers, and the dispersion of one.

[quote name='stevie' post='1316010' date='Jul 25 2011, 05:41 PM']Sorry, I was too cryptic. When standing in front of and above a speaker, a guitarist will hear more and smoother mids and highs when the speakers are side by side than when they are vertical, assuming the top of each cab is positioned at the same height.[/quote] The top of the cab will be higher if it is stacked vertically, that is a bunch of the point.

[quote name='stevie' post='1315987' date='Jul 25 2011, 05:29 PM']That would be one vote for Leo Fender then.[/quote] No, Fender didn't make tall stacks, they made short combos, and guitartists tend to sit on them or stand in front of them, so all the top end misses them and icepicks anyone in front..

I think audience on axis, but guitard's ears off axis is usually the problem scenario.

[quote name='stevie' post='1315869' date='Jul 25 2011, 03:56 PM']Stands that raise and tilt guitar speakers have been available certainly since the 1960s. I imagine Fender offered them; Vox certainly did. Angled cabs have also been available since the 1960s. What difference do you think crossfiring drivers make?[/quote] Moves the cone centers closer together, broadening with dispersion.

[quote name='stevie' post='1315794' date='Jul 25 2011, 02:58 PM']He'd probably be tempted to stick it somewhere else. You have to take Bill's contributions on here with a pinch of salt. One of his (many) regular lines is that Leo Fender didn't know how to design speakers and that guitar drivers should be stacked vertically. But go to his site and look at the guitar cab design that he is flogging for 15 dollars.[/quote] It has speakers crossfired and pointing upward. Not like Fenders, but retaining the width requirement to fit amplifiers. Fender ha the option of making amps that fit, and chose not to.