Ground system Radials, works with K2's!

[Tom Bosscher]

    I am a radio broadcast engineer (for, um, some 3 decades now), and
one of the people on one of the broadcast engineering forums has secured
permission to post a copy of a study on ground systems done in 1957.
This is good reading, and will help fuel the fire of antenna debating in
ham radio!

    The direct link is :

   
http://rfry.org/Software%20Download/Ground%20Systems%20-%20Brown,%20Lewis%20and%20Epstein%201937.pdf

    (watch the wrap)
   
    And the mans web site with the link is:

    http://rfry.org/Software%20&%20Misc%20Papers.htm


          73, de tom K8TB  K2 3206 es K2 5050

p.s., this is a copy of RF's email (Thats Richard Fry!)

**************
After some "back and forth," IEEE just gave me permission to post the
benchmark 1937 paper by Brown, Lewis and Epstein about MW ground systems.

Quite a few on RT and BC asked me earlier for this, but I had to hold
off until it was possible.  Now I hope all those who asked will see this
posting eventually, and view/download it from the link below.  There are
some restrictions on its use, as shown in the file.

The file is about 3.3 megs, so a fast connection will help.

  http://rfry.org/Software%20&%20Misc%20Papers.htm

RF

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[Tom Althoff]

I just sold my Disney 25 year service award (Tinkerbell statue) on E-bay and
bought myself new studded snow tires and a K1-4 with the loot.

I've been reading the manual for the K1....I don't see mention of
auto-sensing of the paddle as in the K2.   If I connect the dit and dah
lines together and connect a straight key to ground will the K1 say "Ah..you
have connected a straight key!" or will it "Di-dah-di-dah-di-dah" whenever
the straight key is pressed?

Tom K2TA
K2/100/AT #1117
K1 #?????


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[Tom Althoff]

The K1 should arrive next week.   I see a lot of mods got incorporated into
production K2's  (AGC thump, NB audio and 100K pot linearity mod).

There is mention of shortening the AGC response time by swapping a 1.0uf for
the original 2.2uf.    Did that mod make it to the current production units
as well?

Thanks!

Tom K2TA
K2/100/AT #1117
K1 #????

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[Mike Morrow-3]

Tom wrote:

>I've been reading the manual for the K1....I don't see mention of
>auto-sensing of the paddle as in the K2.

That's because the K1 keyer does NOT have the "ADn" and "ADr" auto-detect feature.  

However, the K1 quick reference card on Elecraft's site at

http://www.elecraft.com/K1/K1quick.pdf 

has for several YEARS contained several errors, one of which being that it lists these functions for the K1 keyer.  (The other error is that it shows "NB1" and "NB2" for the noise blanker functions, rather than the correct "HI" and "LO" that actually appears in the display.)

73,
Mike / KK5F
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[Mike Morrow-3]

Tom wrote:

>The K1 should arrive next week.   I see a lot of mods got incorporated...

>There is mention of shortening the AGC response time by swapping
>a 1.0uf for the original 2.2uf.    Did that mod make it to the current
>production units as well?

No, I don't think Elecraft has "embraced" that mod officially.  

But without it, the AGC on the K1 is incredibly slow.  I know of no one who has been sorry he made this simple AGC mod.  Fast AGC is generally preferred for CW mode by most operators.  It's always struck me as odd that the stock K1, as a CW-only rig, has such slow AGC.

I'd recommend that you build your K1 with 1 uF at RF-C31, rather than mess with the 2.2 uF value.

73,
Mike / KK5F


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