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[time-freq] TADD-2 Initial checkout current draw...

John Ackermann N8UR jra at febo.com
Sun Feb 21 23:43:25 UTC 2010


You're fine.  I need to update that measurement; it was cribbed from the 
TADD-3 manual and doesn't take into account the second 10V regulator on 
the TADD-2.

I'll update the manual; thanks for pointing out the error.

John
----

Dave hartzell said the following on 02/21/2010 06:14 PM:
> Hello,
> 
> I'm going through the initial checkout and the documentation says that 
> the initial current draw (with NO ICs install) should be less than 15 mA.  
> 
> I see a draw of about 30 mA, which I confirmed with two meters.  The 5v 
> and 10v rails are fine.  No smoke was released.
> 
> This doesn't seem like a "short" or a fault condition, but is twice what 
> the documentation states.  My gut says that this is OK and I'm inclined 
> to proceed.
> 
> Just curious...
> 
> Also, Step 3 of "Initial Test -- 2" says to measure the 5v bus on the 
> cathode end of D1.  It looks to me like that is an error, as that 
> carries all +12v of the supply?
> 
> Thanks,
> 
> Dave
> AF6KD
> 
> 
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