swapping out K2 pa and qrp top

[George Cortez Jr]

Hi
After much hemming an hawing I just ordered the pa for the K2
How hard is it to switch out tops for qrp and qro operation?

Thanks
George
NE2I  K2#4801

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[k6dgw]

George Cortez Jr wrote:
> Hi
> After much hemming an hawing I just ordered the pa for the K2
> How hard is it to switch out tops for qrp and qro operation?
>
> Thanks
> George
> NE2I  K2#4801

Takes me about 5 mins ... 3 to find the phillips screwdriver, and 2 to
change the tops.  Be careful of the two screws in the top middle of the
side plates.  They screw into the heat sink and it is easily stripped.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2007 CQP Oct 6-7
- www.cqp.org
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[Doug Faunt N6TQS [phone]]

   Date: Sun, 04 Feb 2007 14:51:48 -0800
   From: Fred Jensen <[hidden email]>

   Takes me about 5 mins ... 3 to find the phillips screwdriver, and 2 to
   change the tops.  Be careful of the two screws in the top middle of the
   side plates.  They screw into the heat sink and it is easily stripped.

It's very easy to actually drill and tap the heat sink from the side,
then use a 1/2" length 4-40 screw at that location.

As shipped, you're using a short #5 screw into the slot in the heatsink, and
it strips very easily.

73, doug

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[Don Wilhelm-3]

George,

It takes 2 to 3 minutes depending on how fast you can take out 6 screws,
disconnect 4 cables, connect the 1 to 4 cables from the QRP top and
re-insert the 6 screws.

If you do not want to do that amount of effort or will be making the change
often, it is easy to mount the KPA100 in an EC2 enclosure (or mount it with
the KAT100-2.  If you go that route, you will need a KIO2 option installed
in the bse K2 - but there will only be 2 cables to remove from the back of
the K2 to separate the external amp from the QRP K2.

73,
Don W3FPR

> -----Original Message-----

>
> Hi
> After much hemming an hawing I just ordered the pa for the K2
> How hard is it to switch out tops for qrp and qro operation?
>
> Thanks
> George
> NE2I  K2#4801
>
--
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[Kevin Rock]

When I go out into the field I take off the amplifier top and replace it  
with the original top with its ATU.  Upon return from the field I replace  
the amplifier top but do not put in those side screws.  Since they are not  
really necessary (the heat sink is stiff enough) I have not put them in  
after I first built the amp.  There were stories running around of folks  
using larger and large screws to allow for stripping.  I experimented with  
leaving them out entirely and have not had any problems since.  Well,  
other than something similar to Fred's hidden Phillips screwdriver; I need  
to find those screws.  My screwdriver is easy to find, the screws take 90%  
of the cover transfer time!
    73,
        Kevin.  KD5ONS



On Sun, 04 Feb 2007 14:51:48 -0800, Fred Jensen <[hidden email]> wrote:

> George Cortez Jr wrote:
>> Hi
>> After much hemming an hawing I just ordered the pa for the K2
>> How hard is it to switch out tops for qrp and qro operation?
>>  Thanks
>> George
>> NE2I  K2#4801
>
> Takes me about 5 mins ... 3 to find the phillips screwdriver, and 2 to  
> change the tops.  Be careful of the two screws in the top middle of the  
> side plates.  They screw into the heat sink and it is easily stripped.
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2007 CQP Oct 6-7
> - www.cqp.org

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