New KX1 with KXB3080

[Soaring Eagles]

I apologize if this has been covered, but I didn't see it when I searched
the archives.

I received the kit for KX1 sn1519 just this week along with the KXB3080
board. Since there are a few changes to the KX1 board, I'm wondering if I
can do them as I build the basic KX1. I'm not sure how they affect the
basic operation without the KXB3080 board installed. I guess I'm just
looking to see if I can avoid having to change components that I just
installed.

If it's really better to build the basic KX1 then make the changes later,
that's fine, but I had to ask.

Thanks!

Jim Ujcik, WD9HBC

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[Don Wilhelm-3]

Jim,

I do the KXB3080 installs for those who do not wish to do their own - it is
a little bit 'tricky', especially with the physical placement of the added
toroids and their leads.

That being said, I would not recommend that you attempt to install the
KXB3080 as you build the basic KX1.  After you have done 2 of them, you may
be able to pull it off, but not the first, and the second is only a 'maybe'.

The problem is that you have no way of testing the basic KX1 until you have
finished both the KX1 board and also the KXB3080 option.  If you encounter
any problem, it is difficult to determine where it may be.  The KXB3080
changes both the receiver front end as well as the transmitter low pass
filter.

If you are expert at merging 2 sets of instructions and have a very good
photographic memory along with supurb confidence in your ability to build
without error, then you may try merging the two, but I believe if you had to
ask, you should not attempt it.

73,
Don W3FPR


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

> I apologize if this has been covered, but I didn't see it when I searched
> the archives.
>
> I received the kit for KX1 sn1519 just this week along with the KXB3080
> board. Since there are a few changes to the KX1 board, I'm wondering if I
> can do them as I build the basic KX1. I'm not sure how they affect the
> basic operation without the KXB3080 board installed. I guess I'm just
> looking to see if I can avoid having to change components that I just
> installed.
>
> If it's really better to build the basic KX1 then make the changes later,
> that's fine, but I had to ask.
>
> Thanks!
>
> Jim Ujcik, WD9HBC
>

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[David [M0WAM]]

Hi Jim

I did just what you are thinking when I built mine (KX1, KX1AT and KXB3080).

First I built the KX1AT board , then made the LPF1 board from the KXB3080. I
then built the main board incorporating the input filter changes, L6 on the
underside etc.  I fitted the LPF1 board instead of L1 and L2 (leaving the
green wire free), after plugging in the KX1AT temporarily to check the
position of the LPF1 board.  A tight fit...  Having done the testing and
aligning I built and fitted the KXB3080 board, re-aligned and all was fine -
no unsoldering needed.  

I found it useful to mark the KX1 assembly instructions at each point where
a change in component value or procedure was needed, but the whole process
went smoothly thanks to the invaluably colour photos in the downloaded
manuals.

A tip which may be helpful is to solder the ground wires on the crystals
very low down to avoid fouling the battery boxes when the case goes
together.

Regards

David
m0wam

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Soaring Eagles
> Sent: 05 June 2006 04:26
> To: [hidden email]
> Subject: [Elecraft] New KX1 with KXB3080
>
> I apologize if this has been covered, but I didn't see it
> when I searched
> the archives.
>
> I received the kit for KX1 sn1519 just this week along with
> the KXB3080
> board. Since there are a few changes to the KX1 board, I'm
> wondering if I
> can do them as I build the basic KX1. I'm not sure how they
> affect the
> basic operation without the KXB3080 board installed. I guess I'm just
> looking to see if I can avoid having to change components that I just
> installed.
>
> If it's really better to build the basic KX1 then make the
> changes later,
> that's fine, but I had to ask.
>
> Thanks!
>
> Jim Ujcik, WD9HBC
>
> _______________________________________________
> 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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