[time-nuts] FE-5680A Loop Lock Indicator

[Bob Stewart]

I just did a quick inline test with the 3456A.  The resistor measured 
just over 1000 ohms, and it's dropping just over 2.5V before it locks.  
So, that's about 2.5ma current draw from the FE-5680A for about 90 
seconds or so.  I think we're just at the splitting hairs stage on this.  =)

Bob





>________________________________
> From: Al Wolfe <alw.k9si at gmail.com>
>To: time-nuts at febo.com 
>Sent: Sunday, September 22, 2013 6:43 PM
>Subject: Re: [time-nuts] FE-5680A Loop Lock Indicator
> 
>
>   I'm surprised no one suggested using two 2N2222's in Darlington. Then a 22K or more from the base to the indicator pin would not load things down much. Collector load then 1.2K to 2k in series with the LED.
>
>Al, K9SI
>
>
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