Collecting info about K3 and K3s

[Edward A. Dauer]

Over the past few days a number of questions have been posted about the
retrofit mods and other changes to the rig, with some answered but not
all; and the published FAQ doesn¹t anticipate everything we-all are asking
each other.  For example, I had been wondering whether the 100 watt amp
could be removed from a K3 and installed in a K3s/10, creating a K3s/100
and leaving behind a K3/10, for those for whom that would make sense.  Two
posts on the latest issue of the reflector say the PA technology has been
changed . . . suggesting (though unclearly to me) that maybe an organ
transplant in that direction can¹t be done.  Another is whether the KBPF3A
can be retrofitted into a K3 without having to do solder-type revisions to
the existing RF board.  And the like.  I¹ve been wondering whether there¹s
a way this kind of info could be accumulated in some easily accessible
form, as the Qs and As come along, maybe by adopting some common tag line
for later searching.  Not that clipping from every reflector issue
wouldn¹t be great fun, or course . . . .  I have never used ³Nabble,²
whatever that is, or any other archive.  Any suggestions?

Ted, KN1CBR

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[Joe Subich, W4TV-4]

> For example, I had been wondering whether the 100 watt amp could be
> removed from a K3 and installed in a K3s/10, creating a K3s/100 and
> leaving behind a K3/10, for those for whom that would make sense.

Elecraft insiders have confirmed that can be done.

> Two posts on the latest issue of the reflector say the PA technology
> has been changed . . . suggesting (though unclearly to me) that maybe
> an organ transplant in that direction can¹t be done.

Suggested but no specifics yet.  In any case, the original KPA3 will
work with the K3S/10.

> Another is whether the KBPF3A can be retrofitted into a K3 without
> having to do solder-type revisions to the existing RF board.

The KBPF3A will work in a K3.  However, you will still want to add
the new bypass capacitor to the output of the 9V regulator to kill
the LF hash being generated by the regulator although that is not
strictly necessary unless you want to receive at 137 KHz (below
about 250 KHz).

73,

    ... Joe, W4TV


On 2015-05-16 2:23 PM, Dauer, Edward wrote:

> Over the past few days a number of questions have been posted about the
> retrofit mods and other changes to the rig, with some answered but not
> all; and the published FAQ doesn¹t anticipate everything we-all are asking
> each other.  For example, I had been wondering whether the 100 watt amp
> could be removed from a K3 and installed in a K3s/10, creating a K3s/100
> and leaving behind a K3/10, for those for whom that would make sense.  Two
> posts on the latest issue of the reflector say the PA technology has been
> changed . . . suggesting (though unclearly to me) that maybe an organ
> transplant in that direction can¹t be done.  Another is whether the KBPF3A
> can be retrofitted into a K3 without having to do solder-type revisions to
> the existing RF board.  And the like.  I¹ve been wondering whether there¹s
> a way this kind of info could be accumulated in some easily accessible
> form, as the Qs and As come along, maybe by adopting some common tag line
> for later searching.  Not that clipping from every reflector issue
> wouldn¹t be great fun, or course . . . .  I have never used ³Nabble,²
> whatever that is, or any other archive.  Any suggestions?
>
> Ted, KN1CBR
>
> ______________________________________________________________
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>
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> Please help support this email list: http://www.qsl.net/donate.html
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>

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[Grant Youngman]

> On May 16, 2015, at 1:51 PM, Joe Subich, W4TV <[hidden email]> wrote:
>
>
>
>> Two posts on the latest issue of the reflector say the PA technology
>> has been changed . . . suggesting (though unclearly to me) that maybe
>> an organ transplant in that direction can¹t be done.
>
> Suggested but no specifics yet.  In any case, the original KPA3 will
> work with the K3S/10.
>

I recall some comment about FET’s in the new KPA3.  I wonder if the change was simply one of device availability, or if it addresses some of the transmit IMD concerns that have been raised by you and others.

I guess all will be revealed at some point :-)

Grant NQ5T

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[Bruce Beford-4]

> Over the past few days a number of questions have been posted about the
> retrofit mods and other changes to the rig, with some answered but not
> all; and the published FAQ doesn¹t anticipate everything we-all are asking
> each other. <snip>
> Any suggestions?
> Ted, KN1CBR

Yes- continue to ask questions that have not been answered in the current
FAQ, preferably not buried deep in a wandering thread. Then, wait for the
FAQ to be updated after the dust has settled, and Wayne and Eric have gotten
some post-Dayton rest.

73,
Bruce N1RX



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