[time-nuts] Valpey - VF154
redrabbitlosangeles at yahoo.com
Sat May 24 15:42:17 EDT 2008
I applied 5v + ground to the proper pins. Pin 1 left
Results vary from part to part, but within 10kHz of
1MHz.....especially if voltage is dropped to 4.1v.
3.3v output is further off.
I don't know if a load on the output makes a
difference...(load resistor value ? ).
Scope shows a square wave...but not a pretty one.
A 10nf cap across the power pins helps freq stability,
but does nothing to the scope image.
Is it pointless to attempt to get a good sine wave out
of this? ...or best to get a real sine wave part ?
These I'm guessing, are TTL/CMOS type.
> Hi Randy:
> Those appear to be the very common 14 pin dip IC
> pin 7 = ground
> pin 14 = Vdd
> pin 8 = Out
> pin 1 may be no connection or may be inhibit. Check
> with DMM in Ohm and diode
> It sure looks like:
> Have Fun,
> Brooke Clarke
> Randy Leifer wrote:
> > Novice here.
> > I have a small electronics lab at home.
> > PART 1:
> > I have these Valpey Fisher VF154 1 MHz
> > I could not find any details at the VF website on
> > particular model #. (OC, VC, ???)
> > Picture/link below....
> > PART 2:
> > Does anyone have a link to a simple circuit, where
> > could use these to get a stand-alone signal @
> around 1
> > or 2 volts?
> > This is just an educational value/exercise for me,
> > don't really have an intended use (yet) for these.
> > I have some high-speed opamps and buffers....?
> > Thanks,
> > =Randy Leifer=
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