New K2 build...

[k2-6]

Hello,

I was wondering if anyone else has built a K2 lately. I am in build phase
II and I am to install an RF Choke on the back of the board, it's item ID
is RFC15. The manual says to expect a sub miniature with
Brown-Black-Brown. However, my sub miniature RF Choke is
Green-Brown-Green. Is this a recent change that is not noted in the
construction manual?

Best Regards,
Steve
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[AC7AC]

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[Don Wilhelm-3]

Steve,

Look more closely at the bands - I would bet it has a green body and you
are confusing the color code bands with the body color.

A green - black - green RF choke would have a value of 5,0000,000 uH,
and I don't believe that large an inductance would be practical in a
choke of the size you have in hand.

73,
Don W3FPR

[hidden email] wrote:
> Hello,
>
> I was wondering if anyone else has built a K2 lately. I am in build phase
> II and I am to install an RF Choke on the back of the board, it's item ID
> is RFC15. The manual says to expect a sub miniature with
> Brown-Black-Brown. However, my sub miniature RF Choke is
> Green-Brown-Green. Is this a recent change that is not noted in the
> construction manual?
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[k2-6]

Hey Guys,

Thanks everyone for your help, you guys are quick. I found out that I
didn't get an errata sheet with my K2 and Elecraft has replaced the sub
miniature Chokes with larger ones. I guess some people were having
problems with how fragile the minis were. So, I was actually looking at
R116, the only sub mini left, it wasn't a choke at all.

Best Regards,
Steve

> Hello,
>
> I was wondering if anyone else has built a K2 lately. I am in build phase
> II and I am to install an RF Choke on the back of the board, it's item ID
> is RFC15. The manual says to expect a sub miniature with
> Brown-Black-Brown. However, my sub miniature RF Choke is
> Green-Brown-Green. Is this a recent change that is not noted in the
> construction manual?
>
> Best Regards,
> Steve
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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[Will-69]

On Sat, 21 Jul 2007, [hidden email] wrote:

> I was wondering if anyone else has built a K2 lately. I am in build phase
> II and I am to install an RF Choke on the back of the board, it's item ID
> is RFC15. The manual says to expect a sub miniature with
> Brown-Black-Brown. However, my sub miniature RF Choke is
> Green-Brown-Green. Is this a recent change that is not noted in the
> construction manual?

There is a change indeed.  I noted it for future building once I'm past
correcting the build of my control board

Will
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[David King-11]

I sent Steve this answer off list...but it also answers Clark's  
missing R116 question...so I'm posting it to the full list.

dk

Steve...I ran into this same issue with mine a couple of weeks ago and  
when I checked with Scott
at Elecraft parts, he said the small green/brown/green was R116 which  
goes across toroid
L33 in the BFO section (pg58).

I counted all my RF chokes and compared them to the parts list and  
found the parts count
showed a regular sized brown/black/brown so I used that.

I think they need to learn the difference between a miniature and  
sub-miniature!

Also, I couldn't get up to 6V on page 61, the VCO alignment stage...I  
would max out at
3.8 volts...and I had the windings correct on T-5, the correct part at  
C72 and the
correct value at L30...and when I asked and even sent a photo of the  
toriod, Gary said I
should try to squeezing the windings closer together (rather than  
leaving them uniformly
spread out to ensure 85% coverage of the toriod as they stress over  
and over)...I moved
them (pinched) closer and it immediately solved the problem....that  
little tip would be
nice to have show up somewhere in the book, also!

David King
KE7EKA


Quoting [hidden email]:

> Hello,
>
> I was wondering if anyone else has built a K2 lately. I am in build phase
> II and I am to install an RF Choke on the back of the board, it's item ID
> is RFC15. The manual says to expect a sub miniature with
> Brown-Black-Brown. However, my sub miniature RF Choke is
> Green-Brown-Green. Is this a recent change that is not noted in the
> construction manual?
>
> Best Regards,
> Steve
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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