Marconi knob Яeverse Engineering

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If this is still happening, I'd be in for 10 red winged knobs if they come in around the quote onlymeee got. Just decided to build me a 2254.
 
Too bad about these...

Anyway, I ordered 2 from Neve directly, and I've noticed that they're a brass coloured shaft as opposed to the silver that I used to get from BAE.  Also, the hex thread on the little screw is larger, and the hole shaft size will not fit onto the Grayhill switches. 

Does anyone know why?  I thought these were all supposed to be the same?  What can I do now?  Drill out the shaft?

Seems like an odd thing to have to do after spending $90...
 
I'm sure they work fine on AMS-Neve stuff . . . just gotta research and ask questions before buying, especially at that insane price point.  Do they make things sound better?  Sorry, I know that looks matter sometimes, but that's silly money for a knob.




******** bob
 
Siegfried Meier said:
Does anyone know why?  I thought these were all supposed to be the same?  What can I do now?  Drill out the shaft?

i think grinding the shaft is much easier and more safe.
thats the way i've solved such a problem.
 
Pretty risky, because you run the risk of the insert coming loose of the plastic. But maybe grinding with a very small tool will work (dremel), if you have a lathe maybe mount the dremel in the tool holder in some way. Mounting the knob in the clamp will not be easy.
IMHO, returning them is your best bet, it's pretty serious money for a bunch of knobs, they should fit.
 
Ya, I find it odd that they would have different sizes, especially when we're talking about maybe a mm or 2 at the most.  I'll see what I can do to have it machined out.

And they do make the units sound better ********, for your information.

Thanks,
Sig
 
It is probably the difference between 1/4" (6.35mm) and 6mm sizing.

I was building an 8 channel Green pre & I discovered this, so I took a 6mm drill bit & drilled the hole out using a hand drill & holding the knob in my other hand. The uneven movement of the drill made the hole just big enough to fit onto the shaft.

It was 2am in the morning though.

Peter
 
But the difference between 6 and 1/4" is very small, you do run the risk of the drill catching and tearing out the insert, a reamer could be an option as well. These have a less aggressive cutting angle and more cutting edges.
 
For what it's worth, I've been talking to Davies Molding in the US, and they're preparing a quote on these knobs.
 
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