[Elecraft] Tech Mode

[Phil Anderson]

Hey Fred, etal...  about wireless clean up and NOISE. Redoing my 
basement, adding insulation and sheet rock.....once that's done, I too 
must clean up the "wireless stuff" hanging out behind the K3, P3, two HP 
23" displays, and Dell Optiplex 330 on the bench. While cleaning the 
wireless stuff up, I'm planning to follow some of the advice blogged by 
K9YC: replace zip cord with twisted pair (CAT5 type) for cabling (such 
as the winkeyer between the Dell and the K3) various items together, 
grounding the shielded of all boxes on the table to just ONE GND spot 
(which is also connected to GREEN safety). I'm also going to audit where 
the noise sources in the house are and add where needed CMC (chokes) to 
cut the noise level into the radio bench.  For example, I have noted 
that the original contractor (19 year house) added one smoke alarm near 
the kitchen and one at each end of the basement. The cable for the later 
two runs just eight feet above my  bench and the total length of that 
cable back to the breaker box is about 60 feet! That's likely a good 
antenna. I also need to audit all circuits (including door bell) running 
from the eight breakers in the main box and another 6 in the basement 
satellite box. Lots of potential antennas there for RFI pickup!

Right now, my P3 shows a noise level on 30 meters of about 3 dB above 
reference. I also see several steady traces on the waterfall display 
below, finding that the source of that one at 10.122 is my LINKSYS 
router attached to my Dell with cable. So you see, the RFI cleanup is 
probably going to take longer than the basement redo project! 73, Phil, 
W0XI in Kansas.
>
> [(Fred Jenen...) My new synthesizer hasn't arrived yet, but I'm 
> getting the impression that installation is pretty straightforward.  
> What isn't going to be straightforward is sorting out all the 
> "wireless stuff" behind the rack to get the K3 re-installed.  I think 
> I'll dismantle everything, clean up all the dust and use the hand-vac, 
> and start fresh.]
>
>
>
>
>
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> Don Wilhelm <mailto:w3fpr at embarqmail.com>
> Saturday, March 07, 2015 6:12 PM
> No way!
> I have too many passwords and PINs as it is.  Leave well enough alone.
> Those who are prone to inattention and fumble fingers should *not* 
> leave TECH MD set to ON -- do as the manual suggests.
> Those who choose to leave it set to ON will just have to accept the 
> consequences if some calibration parameter is inadvertently changed.
>
> 73,
> Don W3FPR
>
>
>
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> Fred Jensen <mailto:k6dgw at foothill.net>
> Saturday, March 07, 2015 5:51 PM
> Hmmm ... maybe a password or PIN to turn TECH MD on? :-)
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
> - www.cqp.org
>
>
>
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> Don Wilhelm <mailto:w3fpr at embarqmail.com>
> Saturday, March 07, 2015 5:27 PM
> There is no harm in leaving TECH MD set to ON, but there is exposure 
> for those "playing in the menu" to undo the calibration settings that 
> fall under the requirement to have tech mode turned on.  So when used 
> at the home station, fumble fingers is the major exposure.
> Now -- for Field Day and other occasions where others operating your 
> K3 might try changing settings 'just to see what happens', you may 
> want to turn TECH MD off during that event.
>
> 73,
> Don W3FPR
>
>
>
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> Roger D Johnson <mailto:n1rj at roadrunner.com>
> Saturday, March 07, 2015 4:56 PM
> I think it's for Field Day or contests where someone else may be 
> operating the rig. It keeps
> some of the more critical items a bit better hidden.
>
> 73, Roger
>
>
>
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