In the spirit of options , I offer these thoughts.
Some years ago I wired a 16 inch Pickering tonearm with a phase
inversion switch. The DPDT switch is mounted in the channel in the
tonearm portion of the assembly and consequently avoids adding mass to
the cartridge mount. The switch is a subminiature " MICRO" type that
easily fits into the channel. The hole for the toggle was located above
a cutout in the arm making installation very easy.
The bearings in the pivot were removed and cleaned/ lubricated with a
very thin grease . The needle bearings for the pickup were cleaned and
Completly trouble free service for the last twenty or more years.
Why not ( If you have a second cartridge to spare ) wire a second head
shell with the phase invertion already installed ? I'm guessing that
your tonearm has a socket and that the shell isn't hardwired into the
Please excuse me if I sound insulting as it isn't meant to be in any
way shape or form.
Belfer Audio Archive
222 Waverly Ave .
Syracuse N.Y. 13244-2010
>>> [log in to unmask] 5/27/2006 7:54 PM >>>
----- Original Message -----
From: "Marcos Sueiro" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, May 27, 2006 7:57 AM
Subject: Re: [ARSCLIST] lateral cut switch
> Here is a good explanation of the principle (3rd paragraph) and how
> --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
>>> by some considerable degree (the switch probably weighs more than
>>> headshell) and this is not a good idea at all. Far better to
>>> the switch further down the line.
>> ----- actually it is a good idea. It enables the reversal of
>> the floating (non-grounded) coil in a stereo pickup, thereby
>> summing to vertical instead of horizontal. I have used it for 30+
>> only, precisely because of the mass you mention, Graeme, mine is a
>> switch I obtained from a company that manufactures hearing aids,
>> metal, except for switch blades and contact points (gold, rather
>> silver). The rest is plastic. Soldering needed precision work. I
>> not have a preamplifier that permitted doing reversal at the time.
>> Kind regards,