While I was writing that note, I was trying to remember exactly what I used
as a grinding powder. I remember that I had a piece of very thick plate
glass to grind on, and I remember having to add a few drops of water to the
paste every so often while I worked, and I remember having to switch my
fingers to opposite corners frequently to make sure the grinding was even,
but for the life of me, I can't remember what I used to make the grinding
paste. Tooth polish, maybe? It will probably come to me six months from
now, when I'm in the middle of a presentation to a client. I think the
badgers keep nibbling bits of my brain when I'm not looking. Sort of a
delicacy to the badgers, like cheese otters.
I also tried the trick of drawing on the crystal with a lead pencil to
lower the frequency, but that never worked for me.
Funny how things change but stay the same. Just last year I was grinding
ceramic quarter-wave resonators to tune up some near-microwave stuff...
Mike K1MG
>
> > Anyway, trying to move across a novice band is ambitious. I think that
> > trying to move from 3250 kHz to above 3500 is science fiction.
> >
> What's the problem, just use a courser file! :-)
> Never had much in my Novice year (1955). What did you use to grind them?
> I remember trying to use Ajax powder in a paste...
>
> Bob Patten, N4BP
> Plantation, FL
> n4bp@shadow.net
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