Posted by
I7SWX on
May 08, 2007; 4:11pm
URL: http://elecraft.85.s1.nabble.com/Improvement-changes-to-K2-and-K1-transceivers-tp447177.html
Hi all,
Elecraft has announced their new super transceiver,
the K3. It sounds like being a real super duper for HF
enthusiasts and something that may give some distance
to JA Black boxes
. price permitting.
The K3 is no more a kit for the hungry homebrewers
maybe an open box for screws drivers
hi
It is possible that many colleagues will put out for
sale their K2 transceivers, maybe at interesting
prices, to purchase the new K3 RTX. These K2 are
already assembled and for those soldering iron drivers
there is not much work to be done to call themselves
homebrewers.
The K2 is a nice equipment but I believe there is
still space for improvements.
Following a comment I wrote in one message Re:
[Elecraft] here is how to "get a feel" for a roofing
... regarding possible mods to the K2, I received
several requests asking for information. This gave me
the idea to publish my ideas. Due tpo the fact that
this newsgroup has, at my knowledge, no possibility to
load files, I have uploaded the documentation in the
EMRFD newsgroup "Files", certainly one of the most
suitable for homebrewers and fiddlers.
http://groups.yahoo.com/group/emrfd/See for file: I7SWX possible changes to K2 and K1
RTX. It is possible you need to be a member.
The documentation reports suggested changes:
1)Front-end mixer replacement and roofing filter
addition. These mods have been implemented and tested
by I0CG in his K2.
2)Demodulator replacement. This is a more complex
change versus the front-end one. It is suggested and
not implemented
so volunteers are welcomed to
implement it and apply eventual project adjustments.
In addition, but without any written instruction, a
proposal for K1 changes is added. I may update this
part at a later date (the italian version of document
is ready).
Like for the K2, the two changes are: 1) Front end
replacement, similar to the K2 mod, and 2) Demodulator
replacement.
Due to the fact that in both stages the NE602 is used,
these replacements require additional stages.
Improvement should be substantial.
Changes are still theoretical as none have been
applied to a K1
here there is more bread and butter
for the homebrewers.
Comments and feedbacks are welcomed.
73
Gian
I7SWX
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