[Elecraft] K3 13.8 VDC power

[david Moes]

Interesting presentation and I certainly understand the principal of 
supply voltage vs IMD. There are some transmitters that I would not run 
at 12v    some are worse than others.   Im looking specifically at K3 
performance as this is what I have, and as Don points out it is one of 
if not the cleanest out there and as pointed out droping my power by 30% 
would have little effect at the receiving end but would certainly reduce 
IMD and may get me an hour more operating time to boot.      What 
transmitter you were using on page 43    Seems to be an ICOM 7600  for 
most samples  and what were the actual high, nominal, and low voltages. 
   just a guess would be the rigs spec High,  13.8, and spec minimum.

Also  I wonder if I could get the authors permission to use this in a 
presentation at a club meeting.

David Moes
dmoes at nexicom.net
VE3DVY,  VE3SD

On 12/23/2014 02:24, Jim Brown wrote:
> On Mon,12/22/2014 2:50 PM, david Moes wrote:
>> I'm just curios  is there any real test data available showing what 
>> IMD may be present at  various supply voltages?
>
> The link below is for a presentation that K6XX and I did to NCCC a 
> year or so ago. See slide #42 for some measurements that Bob did.
>
> http://k9yc.com/K6XXAmpTalk.pdf
>
> The measurements I posted a day or two ago were done at supply 
> voltages between about 12.5V and 12.9V.  It's hard to find the IMD -- 
> there's some, but it's WAY down.
>
> 73, Jim K9YC
>
>
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