[Elecraft] Impact of this mod: K3 I.F. Output Buffer GainModification???

[Alan Bloom]

The P3 is usable without the mod but it increases the sensitivity of the
P3 display.  On the low bands you probably won't notice any difference
but if you do much 10 or 6 meter operating you probably want to make
sure the modification has been done.

I'm not sure of the serial number of the changeover, but the web site
says "RF board Rev H3 and later" have the new resistor value.

Alan N1AL


On Fri, 2011-12-23 at 09:15 -0800, Matt Zilmer wrote:
> The main value is bringing the IF output up to a level that is usable
> by the P3.
> 
> I thought that the mod was in all K3's after s/n 3600-something or
> other, but there are probably experts around (or Elecraft crew) that
> know the exact cut-in s/n or date.
> 
> 73,
> matt W6NIA
> 
> On Fri, 23 Dec 2011 09:05:22 -0800 (PST), you wrote:
> 
> >Can someone explain the real world value of making this modification? This mod 
> >is listed on the Elecraft website with this description (new production 
> >incorporates this mod):
> >
> >This modification increases the signal level at the I.F. output by more than 10 
> >dB. It requires changing one
> >easily-accessible resistor on the K3’s main RF board with either another surface 
> >mount device (SMD) or a leaded
> >1/8 watt resistor.
> >I have s/n #3012 and expect my radio was pre-modification. I will be adding 
> >filters and other mods after the first of the year and want to make this is one 
> >time affair if possible.
> >
> >Merry Christmas!
> >Jack - WE5ST
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