[PVRCNC] Re: The smell of solder fumes in the morning... was Re: K3

[Brian Alsop]

Guys,

Check for RFI problems on all bands with the external band decoders.

I had problems with a HB band decoder connected to the K3.  It was 
expecting an LPT port type connection.  Had to add pullup resistors to 
achieve this.  That isn't quite enough.  Band decoder would go nuts at 
power levels >50 watts on 160M.  Solution: add .01 bypass caps to ground 
at the switched side of the pull up resistors to ground.  DUH! 

73 de Brian/K3KO
bemeier at bellsouth.net wrote:

>Update to Will's comments about Top Ten - 
>
>I have purchased both Top Ten Band Decoder cables and DX Doubler cables for my K3s.   The DX Doubler cables worked fine and all connections are to the back of the K3, keeping the front totally free of any connections.  OUTSTANDING !!
>
>The Band Decoder cables had a wiring error.   I am currently at work and don't have the details with me, but from memory TX inhibit was swapped with BD2 (I think).  Anyway, the problem was relatively easy to determine by making a simple truth table and comparing it to the BD0, 1, 2, 3 expectations from the K3.   Swap green / blue in one end of the cable - FIXED !!!
>
>K3 connector - page 18 of the manual
>K3 Band Decoder truth table - page 19 of the manual
>
>As for his upcoming research on solder fumes vs. tequila..... well, as my K3s are built I will await his findings.
>
>73,
>Bruce - N1LN
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