Here is a good explanation of the principle (3rd paragraph) and how to do
--On Friday, May 26, 2006 1:40 PM +0200 George Brock-Nannestad
<[log in to unmask]> wrote:
> From: Patent Tactics, George Brock-Nannestad
> Hi Phillip and Graeme,
> you posted:
>> On 26/05/2006 you wrote;
>> ph> Cool cartridge/headshell modification. I never would've
>> ph> thought of this. Now how does it work (so I can do it)?
>> I wouldn't recommend you do this, it raises the mass of the headshell
>> by some considerable degree (the switch probably weighs more than the
>> headshell) and this is not a good idea at all. Far better to place
>> the switch further down the line.
> ----- actually it is a good idea. It enables the reversal of polarity of
> the floating (non-grounded) coil in a stereo pickup, thereby enabling
> summing to vertical instead of horizontal. I have used it for 30+ years,
> only, precisely because of the mass you mention, Graeme, mine is a
> switch I obtained from a company that manufactures hearing aids, with no
> metal, except for switch blades and contact points (gold, rather than
> silver). The rest is plastic. Soldering needed precision work. I did
> not have a preamplifier that permitted doing reversal at the time.
> Kind regards,