The ohm symbol in the symbol character set is the same code as the "W".
I've seen some 10 kW rheostats. You could use the OCXO as decoration on
the shaft.
Mike
On 8/28/2012 7:24 PM, jmfranke wrote:
Now I need to find a 10 KW potentiometer!
John
--------------------------------------------------
From: "Jerry" <[email protected]>
Sent: Monday, August 27, 2012 8:10 PM
To: "'Discussion of precise time and frequency measurement'"
<[email protected]>
Subject: Re: [time-nuts] Isotemp OCXO trimpot question...
I don't know if the list allows attachments but I tried to attach to
this
email a datasheet for a very similar Isotemp 10Mhz OCXO (Model
OCXO134-10;
PN 6624.00002). Just in case the attachment doesn't come thru here
is the
relevant section.
I am not certain whether the pins are the same as your model but I
believe
all the Isotemp OCXO have same arrangement:
3. ELECTRICAL FREQUENCY ADJUSTMENT
3.1. Range > ±0.45 PPM
< ±1.2 PPM (At time of shipment) (Referenced
to nominal frequency)
3.2. Control 0 VDC to Vref (0 VDC to +8 VDC ) or a 10 kW
potentiometer connected between pins 2 and 4 with wiper connected to
pin 3.
3.3. Slope Positive
3.4. Center Vref/2 ±10% of Vref (+4 VDC to +0.8 VDC)
Jerry
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Azelio Boriani
Sent: Monday, August 27, 2012 6:57 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Isotemp OCXO trimpot question...
If there is no datasheet to refer to then the usual value is between
10K and
20K.
10K is the most common value for 5V or 8V Vref. The OCXO should
provide the
Vref output pin to connect one side of the pot, the other to GND, for
a GND
referenced EFC. Your mileage may vary but, without a datasheet, it is
the
best starting point.
On Mon, Aug 27, 2012 at 11:26 PM, Bud Patten
<[email protected]>wrote:
I have an Isotemp OCXO (674-0010-000) an am wondering what is the
recommended value for the frequency trim pot?
Bud
W0LCP
Time is only there to prevent
everything from happening at once.
Einstein
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