Dear forum,

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==About Crystal Measurements==
At the time I mail to BITX about this subject,
'actually' I was using a 3.579545 MHz crystal, that available
at my junkbox and drifting is in this frequency.
( not 12 MHz... ).
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After that email I buy some crystal,
each 10.00 MHz, 12.00 MHz, 12.288 MHz, and 14.00 MHz.
and make some test for each crystal, using my vfo and socket
as?Hans's suggest, then connect / monitor at :
shortwave rx, counter 8 leds, counter one-7segment, and
rs232 - pc monitor ( this rs232 is part of one-7segment counter's add on )
here are the results:
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The measurements stop at 10.00 MHz on 8 led cntr,
since the 8 led accuracy is 10.xxx MHz, and I need to
check them on rs232-pc but happened not displayed.
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Please suggest what is possible here.
-Why for 10 MHz higher the circuit doesn't works normally ?
I have read that for a higher frequency, the vfo gain could be drop.

-Does vfo design limit is at 10 MHz ?
-How to fix this ?

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Thanks.