bdbayer wrote:... air purification is usually done with negative ...
IF you only have one polarity you are adding charge.
bdbayer wrote:If the unit you have pictured only generates negative ...
By the description on the web page, that's what it does.
bdbayer wrote:... probably just hooked to one side of the AC circuit.
There's only two leads.
I've read on the web about a kit (Heath type thing) to build an ion generator that can be used to emit positive 'or' negative ions, depending on how the polarity of all the diodes are set up.
Bun not both alternatively or at the same time. =-/
bdbayer wrote:... wonder if the same device would generate positive if hooked to the opposite side of the AC line.
Might be something to ask an electrician.
No idea how I'd do that. As far as I know (corrections welcome), AC voltage is a sinewave and at line frequency (50/60Hz) will go back and forth from + to - (or something like that).
bdbayer wrote:... Zerostat has really gone up since my days ...
In my days, which are probably the same as yours, it was also a rather expensive thing to have around.
The guy who had an AR turntable, a Rabco SL8 with a Pickering cartdrige and a a Zerostat was king of the neighbourhood. =-)
What would be needed is an AC powered Zerostat-like device, small enough so as to be able to keep it inside the grinder body with the emitters pointing into the funnel.
Thanks for your input.