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The machine still looks exactly the same as it did when I built it: The only thing that will change with this round of upgrades is the spindle - waiting for it to be delivered. You want some examples of work the machine has done?  Here you go: These are ribs for the pair of speakers I am...

A well mated and clamped glue joint is much stronger than the wood itself, so no screws are needed for the joint strength.  The reason to use screws is if you have insufficient clamps (they will clamp the wood together for you while the glue dries), or perhaps if it helps you with alignment in...

The cracks won't do any harm of themselves. The problem is that if the cracks depend then eventually you will have a hole in the surround and that won't be great. Kind regards, Ian.

I am not showing every step of progress because it will just become boring (sanding, painting, sanding, painting, sanding, etc) but here are a few pics of the progress. Bass baffles primed (2K HS primer).  These will now be left to cure for about a week before I do the final sanding job on...

So with the new speaker build and a number of other projects I have been doing the past while I have finally decided to get myself a new spindle for MountainMan. Nothing wrong at all with the current spindle - it is a water cooled 2.2kw spindle with VFD speed contol from the far east.  Those...

Don't use the manufacturers graphs. I have yet to measure an actual driver in a cabinet which looks much at all like the graph the manufacturer provides.  I am not saying they are lying, but their ts ting conditions are vastly different to your real world application. It's normal to have the...

Rubber tends to get brittle if it sits still for an extended period of time. Not too sure why that happens,  but it can be seen even in car tires.  If you have a car you drive daily you won have any issues with tires, but if you have any car that sits unused for extended periods of time you...

Lots and lots of sanding in your future then.  Best of luck! Kind regards, Ian.

Are you planning to do the paint work yourself? 2k paint? Kind regards, Ian.

I have been sanding and filling, sanding and filling, sanding and filling,... ...sanding and priming, sanding and priming, ... ...sanding and filling, sanding, sanding, sanding, sanding... ...and some more priming... for about 5 days solidly now and am finally getting to the point where the...

I agree with you - if you are want to outsource the work, then be prepared to pay for it.  Favors are fine and good if you can call on them, but ultimately if you want good work in a timely fashion it will cost you if you can't do it yourself. Kind regards, Ian.

You can run  both  :thumbs:

Those will work well! I actually recommend 45VAC transformer for the small signal stage, which gets regulated down to 55V DC. The current gain stage normally runs on 35VAC transformers (giving 50VDC) so the large transistors mounted to the main chassis heatsinks will need to dissipate a bit...

Should be fine as long as it's dual secondaries or center tapped  :2thumbs: What VA rating are your transformers? Kind regards, Ian.

^^^ of course you are right - my explanation is no good if you wanted to use it for anything needed in engineering. What I wanted to convey in a over simplified way is how the glass skins make the panel stiffer / stronger even though they are so thin compared to the wood. You mention CLD, and...

I have had issues importing a bench power supply which was somehow classified as a "military use" thing.  Needed to fill in a couple of pages worth of paperwork saying exactly who I am, what I am doing with the equipment, how long I will use it for, what color my bed linen is, where I live, etc...

Hi Guys, Sorry about the delay - sometimes life's little drama gets in the way of our fun... Not too much to report on, but here is something: Some 3D profile milling using a 6mm ball nose bit in MountainMan: The result: I managed to bond my new proprietary damping layers onto the...

Finally here I am making a panel damping "skin" under high vacuum.  These will be used on the front and back of the baffles to damp any ring there and will help stiffen the panel a bit as well. Kind regards, Ian.

Next I did some turning work on the lathe. Started with this: ...and finished with this: --- Not everyone is crazy enough to cut a brand new US$120 driver like this, but it needs to be done (and I am crazy enough).  No going back now, so forward we march  :o Kind regards, Ian.

Little bit of progress... Bass driver baffle drilled: Recess cut: Milling done: Kind regards, Ian.