K2 / KPA100: How to install chokes RFC6-7-8-9 near J8 ?

[OZ2BRN Brian Lodahl]

Hi,

It appears to me that all the mini-chokes RFC6-7-8-9 supplied with the
KPA100 kit is not yet small enough to fit into the outline on the PCB,
as shown near J8 (the DB-9 connector).

The assembly manual does not state anything about the assembly direction
of these chokes, if or if not they may be installed upright instead of
flat on the PCB - but it appears there may be room to do so.

I'm worried that if i attempt to force them in lying flat, I will damage
the chokes insulation or cause for an open joint.

Any experience here from previous KPA100 builders - what to go for ?

73'
Brian OZ2BRN
K2 # 6936



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[Don Wilhelm-4]

  Brian,

I believe this is addressed on the errata sheet (it used to be).
Yes, you can install them upright or at an angle, or with both leads
bent under the body to enable horizontal mounting - the choice will
depend on your version of which is more aesthetically pleasing.

73,
Don W3FPR

On 1/2/2011 1:52 PM, OZ2BRN Brian Lodahl wrote:

> Hi,
>
> It appears to me that all the mini-chokes RFC6-7-8-9 supplied with the
> KPA100 kit is not yet small enough to fit into the outline on the PCB,
> as shown near J8 (the DB-9 connector).
>
> The assembly manual does not state anything about the assembly direction
> of these chokes, if or if not they may be installed upright instead of
> flat on the PCB - but it appears there may be room to do so.
>
> I'm worried that if i attempt to force them in lying flat, I will damage
> the chokes insulation or cause for an open joint.
>
> Any experience here from previous KPA100 builders - what to go for ?
>

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[OZ2BRN Brian Lodahl]

Thanks, Don - but I just checked again this morning, and it appears
neither to be mentioned in the latest assembly manual nor in the latest
errata sheets for KPA100.

@ Eric, Wayne; Maybe this is to be mentioned in next revision of the
errata sheets ?

73'
Brian OZ2BRN
K2 # 6936


Den 02-01-2011 20:51, Don Wilhelm skrev:

>  Brian,
>
> I believe this is addressed on the errata sheet (it used to be).
> Yes, you can install them upright or at an angle, or with both leads
> bent under the body to enable horizontal mounting - the choice will
> depend on your version of which is more aesthetically pleasing.
>
> 73,
> Don W3FPR
>
> On 1/2/2011 1:52 PM, OZ2BRN Brian Lodahl wrote:
>> Hi,
>>
>> It appears to me that all the mini-chokes RFC6-7-8-9 supplied with the
>> KPA100 kit is not yet small enough to fit into the outline on the PCB,
>> as shown near J8 (the DB-9 connector).
>>
>> The assembly manual does not state anything about the assembly direction
>> of these chokes, if or if not they may be installed upright instead of
>> flat on the PCB - but it appears there may be room to do so.
>>
>> I'm worried that if i attempt to force them in lying flat, I will damage
>> the chokes insulation or cause for an open joint.
>>
>> Any experience here from previous KPA100 builders - what to go for ?
>>
>
>

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[K1FFX]

I believe this is what you are looking for:

http://www.elecraft.com/Apps/Builder%20Alert%20Installing%20Small%20Chokes%20Rev%20B.pdf

I found it after breaking one of the leads off RFC9 (!).

You can have a look at the photo at:

http://build-k2.blogspot.com/2010/12/rfc9.html

Cheers -

Bruce

[OZ2BRN Brian Lodahl]

Hi Bruce K1FFX,

Yep, this is also pretty much similar to what I ended up doing - gently
bending the leads down below the body of the miniature RFC package,
letting them rest elevated about 1mm above the PCB.

Good picture - shows the detail of it, and good that there was a
backstory to this and I was not the only one loosing my mind over such
otherwise perefect build record.

May I suggest you still check (as mentioned in the manual) with an
ohmmeter that there is good DC contact through each of the RFC 6-7-8-9
to be sure that the bending of the leads does not cause for internal
breakage ?

73'
Brian OZ2BRN


Den 05-01-2011 21:52, K1FFX skrev:

> I believe this is what you are looking for:
>
> http://www.elecraft.com/Apps/Builder%20Alert%20Installing%20Small%20Chokes%20Rev%20B.pdf
>
> I found it after breaking one of the leads off RFC9 (!).
>
> You can have a look at the photo at:
>
> http://build-k2.blogspot.com/2010/12/rfc9.html
>
> Cheers -
>
> Bruce
>
> -----
> Bruce Rosen
> K1FFX
>

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[K1FFX]

Hi, Brian -

Yes ... I definitely followed the manual's instructions and tested
all of the RFCs after installation ... fortunately, there were no
problems.

Just got T1 and T2 installed ... quite time consuming but it looks
like they both went in OK.

73.

OZ2BRN Brian Lodahl wrote

May I suggest you still check (as mentioned in the manual) with an
ohmmeter that there is good DC contact through each of the RFC 6-7-8-9
to be sure that the bending of the leads does not cause for internal
breakage ?