On Apr 6, 4:49 pm, robert casey wrote:
Many years ago my father (now a silent key) built a crystal tester that
pretty much worked with any crystal you stuck into it. Low frequency,
high frequency, name it. It also had a meter that indicated "crystal
activity" and also had an adjustment (think it was a pot) for IIRC
"bias". Also an output jack to feed say a frequency counter.

I imagine that he got the circuit from either an issue of QST or the
handbook. Searched the web, though I found many circuits, none looked
like this one. Anyone recognize from my sketchy description the circuit
my father used, and any links to where I can get a schematic so I can
build my own? TIA

73s Bob

To check crystals I use an old Heathkit Grid dip oscillator. good
xtal will oscillate, meter will show activity ,tune it in on your
receiver to read frequency. Don`t think the newer GDO (fet osc) will
work as well as the old tube type..I see them at hamfest ,sometimesf
or or a few bucks..GL HS