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

[iain macdonnell - N6ML]

The app note says that the mod is incorporated into all new K3's since
September 2009.

Without it, the P3 (or other panadapters) should still function, but
some weak signals may be undetectable due to the noise floor of the IF
being below that of the panadapter.

   ~iain / N6ML



On Fri, Dec 23, 2011 at 10:22 AM, Mike <nf4l at nf4l.com> wrote:
> I'd be interested in knowing also.
>
> 73, Mike NF4L
>
> On 12/23/2011 12:15 PM, 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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