Re: KX-1 and 15M

[Dave G.]

Nope.... you are *NOT* the only one...
I, too, can only sit and wish....
and wait....    nudge, nudge, wink, wink!!

-
Dave G, KK7SS
'65 MKIII Sprite, Richland, WA
KX-1 #1913

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[Bruce Beford]

Wink and nudge all you like. 15M for the KX1 is unlikely to ever happen,
IMO. The DDS is driven by a 50 MHz clock. This sets the maximum clean output
frequency at about 16.6 MHz. (Clk/3). There is also a 14 MHz low-pass filter
on the output of the DDS. So, to do 21 MHz would require a new master clock
(surface mount),  and new output filter for the DDS. Of course another
(switchable) LPF filter for the PA and new firmware... Many of us users
would be willing to make the mods, but I just don't see it as an Elecraft
priority for a retrofit. Perhaps a new (rev B) version could be made, but I
imagine it would be a trade-off. I doubt 5 band capability could be done
without a lot of redesign. Perhaps you could make a 40M to 15M transverter,
and put it in place of the ATU...

72,
Bruce N1RX
KX1, K1, K2 and (soon) K3 user.


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[Mike Fitzgibbon]

With Elecraft now doing SMD I think it will be virtually impossible for
Wayne et al not to design and build a small pocket-sized radio using
surface-mount devices.   Maybe a partial kit with factory-built circuits
for the amps and oscillators, but user-built frequency-specific boards
like the Sierra kit.  Maybe handi-talkie sized and with user-selectable
band boards....Maybe with the capacity to hold two, three, five or so
band-specific boards...  or just one board that can be built with tiny
toroids(gotta give the toroids haters something to whine about...) and
set up for just a few bands.

Like I said...I think it will happen, after a time... and the other
products now in the works are out of the way...I don't think they can
resist.  After all, small radios and portable operation is a large part
of the foundation of qrp operations.  Although I have a KX1,  I would be
interested in a smaller more robust(enclosure) radio that could be
slipped in the pocket and if my fat ass falls down hiking in the hills
with it in said pocket...there is still some slim chance of it's
survival...crush tested to 250 lbs!

Would like to see something other than an active-mixer design, although
I know current considerations may get in the way of that, although new
mixers are being developed all the time and will continue to be.  Also,
modern battery technology has progressed to the point that running
post-mixer amps and other current-hungry circuitry may be possible now
or fairly soon with a small package.

This is something I have been thinking about for some time...  Over the
winter I and another gentleman are planning on attempting to build some
small 17 M SSB rigs...don't know how far that will get but with me and
ham radio... it is the journey and not the destination...I like to
tinker...

       Mike Fitz  N0MF
 


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[Bill Johnson-9]

My interest has always been to have a sub-mini HF SSB 17 meter radio with
all the goodies at least no bigger than the KX1 with tuner and batteries...
so hope you are successful if Eric and Wayne don't beat you to it.  I think
they might be doing the linears next though.

Bill
K9YEQ


-----Original Message-----
With Elecraft now doing SMD I think it will be virtually impossible for
Wayne et al not to design and build a small pocket-sized radio using
surface-mount devices.   Maybe a partial kit with factory-built circuits
for the amps and oscillators, but user-built frequency-specific boards
................

Like I said...I think it will happen, after a time... and the other
products now in the works are out of the way...I don't think they can
..................

This is something I have been thinking about for some time...  Over the
winter I and another gentleman are planning on attempting to build some
small 17 M SSB rigs...don't know how far that will get but with me and
ham radio... it is the journey and not the destination...I like to
tinker...

       Mike Fitz  N0MF
 

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