All these newfangled units like nano and pico are OK as far as they go, but
before they were around, real engineers and tinkerers used micro-microfarads
(mmF) bur conversationally called them mickey-mikes. That has kind of a
ring to it, don't you think? Kind of a buzz? Reminds you of the days when
electrons went through vacuums and capacitors had wax on them. When you
could solder things without a microscope. Not to sound like a Luddite, but
I long for the good old days, when you knew when something failed--your ears
rang and the air was full of fluttering aluminum foil. THEM was the days.
---Carl
Now, where the heck is the SEND key?
-----Original Message-----
From: David Rieben
Sent: Tuesday, December 09, 2014 3:45 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Sprague 4000MMFD caps
Hi Dave,
Looks like you were asking a question about .004 ufd being equal to 4000
mmfd (pFd). 4000 (10 e-12) Farads would indeed equal .004 (10 e-6) Farads
:-) The mmfd (micro-microfarad ~10 e-12 or one-trillionth of a Farad) is
now a pretty much archaic term and is now usually expressed as a pFd
(picofarad). Of course, it could also be expressed as 4 nFd (nanofarads)
David Rieben
david baehr <dfb25@xxxxxxxxxxx> wrote:
' Hockey puck' caps 30kv, about 2 5/8" x 1 1/2" size . Using on a
7500/60 neon right now, may move up to 9000/60.
How much abuse can these take ? I'm guessing heat is a concern.
Working well on small coil now. Short runs . Maybe someone here has used
them and can comment.