Order Tray | Contact Us | Home | SIG Lists

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

Dave hartzell hartzell at gmail.com
Sun Feb 21 23:51:36 UTC 2010


John-

No worries, thanks for the great kit!

Dave



On Sun, Feb 21, 2010 at 3:43 PM, John Ackermann N8UR <jra at febo.com> wrote:

> 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
>>
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> time-freq mailing list
>> time-freq at tapr.org
>> https://www.tapr.org/cgi-bin/mailman/listinfo/time-freq
>>
>
> _______________________________________________
> time-freq mailing list
> time-freq at tapr.org
> https://www.tapr.org/cgi-bin/mailman/listinfo/time-freq
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tapr.org/pipermail/time-freq/attachments/20100221/30cc9463/attachment.htm>


More information about the time-freq mailing list