The older (FT-243 style) crystals could be opened with just three small screws. The rectangular
piece of quartz could be removed and cleaned, -OR-, you could make marks on it with a pencil to
LOWER the frequency a very small amount. Essentially you were just adding a little mass to the
vibrating quartz, slowing it down slightly. Had nothing to do with the composition of the pencil,
just added mass. The risk was if you added too much mass, the crystal would get sluggish and even
quit oscillating. Then it was time to open it up again and clean off all the pencil marks.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Neil M Califano wrote:
Someone I know used to write on crystals with a pencil claiming the frequency
could be changed. Is this true or an urban legend, because graphite is
crystalline?
_______________________________________________
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist
