[Elecraft] K2 Two Alien Problems

[David Fleming]

The rush-rush sound might be serial port noise caused
by mmtty polling the rig. I get serial port noise on
my K2. Or it could indeed be aliens.

David, W4SMT

--- Fred Jensen <k6dgw at foothill.net> wrote:

> OK, only one is Elecraft-related.
> 
> 1.  Not Elecraft One:  15m RTTY, K2/100 feeding amp
> to 500W, DC muffin 
> fan on KPA100 heatsink, tower is ENE of the back
> corner of the house 
> about 15m away, beam at 070.  All is well.  Turn
> antenna to WNW 
> [starting to get over the house], and when I
> transmit, the fan stops. 
> While transmitting, turn beam back to 070 [away from
> house], and fan 
> slowly speeds up.  This happens when I have the fan
> on the K2 running 
> but I'm transmitting on my soon-to-be-replaced
> TS-850 at 500W from the 
> amp too.  Ideas welcome, no full-moon stories
> please.
> 
> 2.  Elecraft one [I think]:  My RTTY set-up is
> really minimalist.  Sound 
> card feeds the mic input, headphone jack feeds the
> sound card input, VOX 
> keys the radio, a splitter feeds a little RS audio
> amp to my headphones. 
>   It's about the complexity I can handle with the
> gap between RTTY contests.
> 
> Regardless of band, I have a very low "rush-rush"
> sound in the cans.  If 
> you remember the movie "Contact," it sounds like the
> alien prime number 
> signal before we did all the DSP to it and found
> other stuff.  Just 
> "rush-rush-rush" about once a second.  [I tried
> counting them, but so 
> far, no prime numbers, I don't think it's ET].  I'm
> close to deaf so it 
> may be a lot louder than I think, but it doesn't
> show up, that I can 
> tell, on the MMTTY displays.  It changes character
> when I am tuning the 
> K2.  It also will change intensity when I move the
> headphone cord.  I 
> can make it stop by tuning the radio real fast. 
> This does not happen 
> when I'm on the 850 [or FT-847].
> 
> It doesn't bother me all that much, just curious. 
> Ideas welcome, let's 
> leave full moon stories out of this.
> 
> 73,
> 
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2008 Cal QSO Party  4-5 Oct 08
> - www.cqp.org
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