[Elecraft] K1 on 80 meter 300 KHZ ?

[Jessie Oberreuter]

     Giuliano, I0cg addresses this in his SSB mods for the K1.  See his
site:
	http://it.geocities.com/giulianoi0cg/

     I believe he parallels a 68pf NPO cap with the 120pf C2 to get a
250khz tuning range.  This prolly makes cw tuning a bit sensitive, but it
is a way to increase the range w/out sacrificing a band.  I don't recall
if RIT and XIT can both be turned on at the same time in the K1, but if
you remove or otherwise disable the 2n7000 that shorts across the RIT pot,
you could use it as a general purpose "fine tune", and use the LED drive
to control a back light :).

     Similar to your own suggestion, you could also use a four band board
to get two pairs of 150khz sets, but then you'll likely need to find
additional crystals for the required offsets.

     A third possibility would be to modify the VFO and/or pot circuitry
to be externally switchable into two ranges.  I seem to recall that this
is awkward, but I don't have the schematic in front of me.


On Wed, 26 May 2004, Oddvar Haug wrote:

> I have bulidt the K2 and KX 1 , both with all options, they works vy
> nice, now i have plannned to build the K1. As i can see in the spec, the
> K1 has only 150 KHZ on each band, so my question is: Is there some mod.
> i can do, so that the K1 will cover 300 KHZ on 80 meter , eg 3500 -3800
> KHZ ? One idea i have is to use a band module to ( 2 band ) to set up
> for two band segments on 80 meter, but there must be better metodes to
> got 300 KHZ bandwith ?? or is'nt it ? Hope someone have good tips to do
> it .
>
> 73 de LA2FCA
> Oddvar
>
>
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