Re: [Elecraft] OT: moving xtals

[Thom LaCosta]

On Sat, 16 Jun 2007, DOUGLAS ZWIEBEL wrote:



To lower the frequency, I used to make figure 8's using solder to
"draw" on the xtal's flat surface.  Of course, you could not lower the
frequency too much that way or the xtal would stop vibrating.


I remember using the "lead" from the softest pencils I could find.




Remember all the "circuits" that you could find that let you "rubber" the xtals?


Ah...the fun days when nobody thought about holding solder in their
hands (or mouth) and intentionally inhaling solder fumes (tendrils)
cuz it smelled so good.


That was the approved soldering methodya held the solder in your teeth, so 
that you had an extra handand if you got real fancy, you mounted the 
soldering iron so that the tip was reight in front of you...that way, you could 
use both hands to hold the stuff that you wanted to solder together.


Can't do it anymorethe hands shake, not enough teeth to hold solder and 
seeing anthing that close is impossible.



Thom,EIEIO
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[Elecraft] OT: moving xtals

[DOUGLAS ZWIEBEL]

Al said:
Then  we'd disassemble the xtals and soak em in acid for a few minutes
to tweak them  up 3 or 5 KC.


I never did that.  I used to make a slurry with Comet (the cleanser,
before it went grit free) and, using an index finger on the xtal, make
circles in the slurry to "grind" the xtal (move it up in frequency).
Using this method, you could move a xtal all the way up the band, but
it took time.  And you would "measure" the frequency by transmitting
with it by FINDING it on your receiver, then taping a paper label to
the xtal with the new QRG.

To lower the frequency, I used to make figure 8's using solder to
"draw" on the xtal's flat surface.  Of course, you could not lower the
frequency too much that way or the xtal would stop vibrating.

Ah...the fun days when nobody thought about holding solder in their
hands (or mouth) and intentionally inhaling solder fumes (tendrils)
cuz it smelled so good.

de Doug KR2Q

PS...I have a crystal for 7000.1 - by is that a good one...would
multiply up on LOTS of bands!
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