[Lowfer] [part15] " XR " got thirsty

[Andy - KU4XR]

Charlie:

I checked the datasheet, and mine is the Output Enable option.
I set ARGO on QRSS-3 to watch the shift, and when I touch, or
move the osc. chip it jumps around noticably. I can touch the
power connections and solder joints and it's steady, 



Andy - KU4XR - EM75xr - Friendsville, TN.
LOWfer Beacon " XR " @ 185.29855 KHz ( QRSS-60 )
Coordinates:  N:  35* 43' 54" - W:  84* 3' 16"
http://www.myspace.com/beaconxr


--- On Sun, 10/4/09, Charlie , W5COV <cvest at cox.net> wrote:

> From: Charlie , W5COV <cvest at cox.net>
> Subject: Re: [Lowfer] [part15] " XR " got thirsty
> To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net>
> Date: Sunday, October 4, 2009, 12:24 AM
> Andy , did you order the Standby
> option , or the Output Enable option ?
> 
> Lyle makes this note on them :
> 
> If the OE/ST pin is left floating, the oscillator runs
> continuously. When it 
> is grounded, the oscillator is either placed in STANDBY or
> OUTPUT DISABLE 
> mode, depending on the chip option. The difference is that
> chips with the 
> STANDBY option will turn off completely when OE/ST is
> grounded. In chips 
> with the OUTPUT ENABLE option, the oscillator keeps running
> but the output 
> stage is turned off. There apparently is an internal pullup
> resistor of a 
> couple of megohms on the OE/ST line, because the current
> from the pin is 
> only about 2 microamps when it is grounded. If you want to
> be able to shut 
> off the oscillator with a logic-level signal and minimize
> power consumption 
> while in the disabled mode, you would want a chip with the
> STANDBY option. 
> For rapid on/off switching, as in a CW transmitter, you'd
> need the OUTPUT 
> ENABLE option.
> 
> Charlie , W5COV 
>