[Elecraft] KRC2 Band Decoder

[Iain MacDonnell - N6ML]

Matt/W6NIA notes, off-list, that the driver in the KRC2 has protection
that makes the diode unnecessary ... but, personally, I'd still include
it anyway - it's just good practice...

     ~Iain / N6ML



mzilmer at verizon.net wrote:
> I cannot post to the group from this account right now, so feel free to 
> paraphrase or repost.
> 
> If he's using the KRC2, diodes won't be needed for either sink or source 
> outputs.  The TPIC6C595 driver includes transient protection for both type of 
> output...
> 
> 73,
> matt W6NIA
> 
> 
> May 29, 2009 12:16:12 PM, ar at dseven.org <mailto:ar at dseven.org> wrote:
> 
> 
> 
>     Vic K2VCO wrote:
>      > Jack Smith wrote:
>      >> Source = the device outputs current
>      >> Sinks = the device pulls the current to ground.
>      >
>      > In practical terms, you can connect a 12v dc relay to a source terminal
>     of the KRC2 and
>      > ground the other side of it.
>      >
>      > To use a sink terminal, connect +12v dc to one terminal of the relay and
>     ground the other one.
> 
>     Err, you mean connect the other one to the "sink terminal" :)
> 
>     You should also have a diode across the coil of the relay, of course,
>     so your "sink terminal" doesn't get slammed as the magnetic field
>     collapses when it's turned off.
> 
>     ~Iain / N6ML
> 
> 
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