[Elecraft] K2 and Digital Modes

[David Wilburn]

The good news is that digital modes do not require a lot of power.  I 
worked Israel on 50w, and Seattle of 15w from the east coast of 
Virginia.  You can an additional fan, I believe Tom shows it on his page.

David Wilburn
dave.wilburn at verizon.net
K4DGW
K2 #5982


Tom Hammond wrote:
> Gary:
> 
>> I'm thinking of buying the kit for the K2 with the 100 watt PA. I will 
>> mainly be operating on Digital modes such as PSK 31 MFSK 16 RTTY and 
>> Hellschreiber. I will be using a Tigertronics SL 1+ interface but was 
>> wondering if there are any known problems with the K2 and any or all 
>> of these modes before I buy the Kit and start building.
> 
> The KPA100 is a nice 100W amp, BUT it is NOT rated for 100% duty cycle 
> in digital (continuous-duty carrier) modes. In fact, were it me, I'd 
> probably not run it at more than about 40W output if I was using it on a 
> digital mode.
> 
> You COULD probably run it at somewhat higher output IF:
> 
>  1) You remoted the KPA100, as MANY(!) have done, to a separate EC2
>     enclosure, AND
> 
>  2) IF you took steps to BLOW A LOT of air across the heatsink.
> 
> At higher continuous duty output power levels, I'd want to pass a
> LOT of air across both the TOP and the BOTTOM (between the PC board and 
> the heatsink) of the heatsink.
> 
> Cheers,
> 
> Tom Hammond
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