Revised Shipping date for K3

[Don Rasmussen]

Vic GLOATED shamelessly:
---------------------------------------------------------------------------
Okay - last night, I worked G4AMT with my K3. Here is
a very interesting shot - of G4AMT coming back to
KC7V.  I snapped the photo a bit too soon to get his
full call in the display:
http://www.kkn.net/~tree/160/G4AMT.jpg
Note the frequency.  You might wonder about the
display on the left showing my passband (it's got
wings on it).  Just yet another feature that hasn't
been talked about yet that will blow the socks off the
competition.
Vapor - not.
-------------------------------------------------------------------------
The only vapor is coming off my jealous tears - pass
the Kleenex I am about to write a Country song... ;-|
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[Jay Schwisow]

I expect many non-CW guys (and gals) will get on CW with this in-display
decode feature.  Cool and well done Elecraft!

Jay - KT5E

Don Rasmussen wrote:

> Vic GLOATED shamelessly:
> ---------------------------------------------------------------------------
> Okay - last night, I worked G4AMT with my K3. Here is
> a very interesting shot - of G4AMT coming back to
> KC7V.  I snapped the photo a bit too soon to get his
> full call in the display:
> http://www.kkn.net/~tree/160/G4AMT.jpg
> Note the frequency.  You might wonder about the
> display on the left showing my passband (it's got
> wings on it).  Just yet another feature that hasn't
> been talked about yet that will blow the socks off the
> competition.
> Vapor - not.
>
>
>
>  

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[Julian, G4ILO]

A lot depends on how well it decodes someone sending with his left
foot and only a few dB above the noise. But I hope you're right. CW is
the original digital mode!

--
Julian, G4ILO K2 s/n: 392  K3 s/n: ???
G4ILO's Shack: www.g4ilo.com
Ham-Directory: www.ham-directory.com


On 9/14/07, Jay Schwisow <[hidden email]> wrote:
> I expect many non-CW guys (and gals) will get on CW with this in-display
> decode feature.  Cool and well done Elecraft!
>
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[Fraser Robertson]

Apologies for this completely OT question, but I know I'll get some good
answers on here, plus it will make a change from 'where's my K3?'

Someone has just asked me this, and I confess it’s something that’s puzzled
me before:

In HF ATUs, and high power linears for that matter, it is common practice to
short out the unwanted turns of an inductor, e.g. in a tapped/switched coil.
Why does that not have a significant effect on the Q of the coil.  I know it
would have a detrimental effect in a transformer, so what’s the difference?

I’d be grateful for any comments/pointers.

Thanks / 73 Fraser G4BJM (K2/100 etc.)

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[Fraser Robertson]

I had two personal replies, from K6DGW and GM4ESD, thanks guys.  I think the
crux is that these are air cored coils, so the coupling between turns and
therefore the detrimental effect is lower.  Unlike the case of say a mains
transformer, where the core ensures tight coupling, so a shorted turn is
much more significant.

Please excuse the BW but I hope this is of interest.  73 Fraser G4BJM

>From: "Fraser Robertson" <[hidden email]>
>To: [hidden email]
>Subject: [Elecraft] OT question - shorted inductor turns
>Date: Sat, 15 Sep 2007 12:28:45 +0000
>
>Apologies for this completely OT question, but I know I'll get some good
>answers on here, plus it will make a change from 'where's my K3?'
>
>Someone has just asked me this, and I confess it’s something that’s puzzled
>me before:
>
>In HF ATUs, and high power linears for that matter, it is common practice
>to short out the unwanted turns of an inductor, e.g. in a tapped/switched
>coil. Why does that not have a significant effect on the Q of the coil.  I
>know it would have a detrimental effect in a transformer, so what’s the
>difference?
>
>I’d be grateful for any comments/pointers.
>
>Thanks / 73 Fraser G4BJM (K2/100 etc.)
>

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[AC7AC]

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