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[time-freq] TADD-2 assembly question

Kyle Jamieson jamieson at gmail.com
Fri Jan 15 12:29:43 UTC 2010


Thanks for the reply; it's running great now.

Just for the record, I believe there's an error where "Initial Test --
2" asks to measure 5V bus at D1's cathode: it is in fact 13.8V there,
but one can check the 5V bus voltage at the output of IC1 instead.

Kyle

On Thu, Jan 14, 2010 at 6:29 PM, John Koster <w9ddd at tapr.org> wrote:
> I don't have one to check to be sure, but you can use the shell of the
> Synch input BNC as a ground reference to see which pin of JP2 is ground,
> or conversly F1 should be at 13.8, so you can check which pin has
> continuity to it.
>
> On Thu, 14 Jan 2010, Kyle Jamieson wrote:
>
>> Hi all,
>>
>> I just picked up a TADD-2 and have a question with assembly.
>> Installation of most components and the steps "Initial Test--1",
>> "Integrated Circuit Installation -- 1" (as documented in the
>> instructions) went smoothly.  Now I am at "Initial Test -- 2" where I
>> need to apply 13.8V to JP2.  My question is: in which direction
>> (looking at the circuit board right side up sitting on a table) across
>> JP2 do I apply 13.8V?  Positive lead on the right hand side pin, or
>> left?
>>
>> Thanks,
>> Kyle
>>
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>> time-freq at tapr.org
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>>
>
> --
> 73,
> John, W9DDD
>
>
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