[Elecraft] Line Audio Output Mod

[Don Wilhelm]

  Barry is correct.  The Revision number printed on the board is for the 
PC Board layout itself, and has little relationship to the version of 
the populated board.  This is not an "Elecraft only" situation, it is 
common in the industry.  This is quite common with computer option cards 
as well, especially video cards.

Now, if there is a paper sticker on the board, it will usually convey 
the level of the assembled board.

Bottom line - do not depend on the markings on the board for level 
identification without further manufacturer's substantiation that the 
markings on the board do indeed identify the level.

73,
Don W3FPR

On 1/19/2011 8:39 PM, Barry N1EU wrote:
> Dave, which part of the instructions indicate your board needs the mod?
>
> The Elecraft Web site says K3's before: "about Oct 7, 2008, about S/N 1900"
>
> The revision marked on your board has no bearing on this.  Boards needing
> the mod will measure 604 ohms at R19 and R20 as Joe mentioned.
>
> 73, Barry N1EU
>
>
> DBellW6AQ wrote:
>> I'm really confused.  I have a KIO3A, Rev A, C 2007.  According  to the
>> Mod
>> instructions this board should need the resistance  modification. . . . .
>>
>> What gives?  Instructions wrong?
>>