AETHERPHON, global theremin family

Thanks Kevin.  Thanks David.

This is very helpful and informative advice from both of you.  Now that the black paint on my theremin is no longer perfect, I feel the temptation myself to drill.

-Chris


--- On Thu, 9/4/08, David VanHorn <microbrix@...> wrote:

> From: David VanHorn <microbrix@...>
> Subject: Re: [Aetherphon] capacitance drift
> To: aetherphon@yahoogroups.com
> Date: Thursday, September 4, 2008, 4:32 PM
> > You can use a small, jeweler's screwdriver however
> -- if you force the
> > coil adjustment too far it is easily damaged.  The
> plastic tool
> > reduces the risk of damage from over-tightening.
> 
> That's not quite right.
> 
> The damage comes from the screwdriver being a hard wedge,
> and the core
> being VERY brittle ferrite.
> Pushing the screwdriver in hard enough to make it turn the
> core, puts
> enough pressure on it to crack the ferrite if the
> screwdriver isn't
> held exactly vertical.
> Radio shack sold a kit of tuning wands, which work nicely.
> I'm not
> sure if they still sell them.
> 
> Also, the metal of the screwdriver will affect the tuning.
> 
> It seems like sacrilege, but I've been very tempted to
> drill a small
> hole in the upper case, right over the coil, so I can tune
> without
> having to guesstimate the shift of installing the upper
> case.