Robert Ladden <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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In International Crystal terms, FC is the channel frequency. That is
the frequency that the operator sees (such as 14.0 MHz). FX is the
crystal frequency. That is the actual frequency of the crystal. For
example, on a T-4XC, the crystal frequency is 11.1 MHz higher than
the channel frequency. When I order from them, I give them both and
they seem to understand.
So it is not fundamental and overtone frequencies. You really want to
be sure the actual crystal frequencies are correct. The receipt
should list it all.
73,
Bob WW3QB
At 08:08 PM 3/2/2008, you wrote:
"Rich Carter" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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I received a set of four premixer crystals from International Crstal for my
TR-3. The TR-3 premixer is the same design as that used in the TR-4. Two
of the crystals work fine, but two don't work. I am unable to align the
second pair. Each crystal has two frequencies marked on them, FC and FX. I
seem to remember something about fundimental and overtone frequencies of a
crystal, and suspect that these two measurements are related to that. The
two crystals that work have a fundimental frequency (FC) that matches what I
ordered, whereas the two that don't have an overtone (FX) that matches what
I ordered. I assume that international crystal is aware of what the Drakes
require, so I'm puzzled that they appear to have sent me the wrong parts.
If someone could briefly explain what the difference between these two
measurements is, or point me to a web-page, I'd appreciate it.
Rich - KE1EV
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