[Elecraft] K2: IF Tap Point

[Paul Gacek]

Don

Do you know what has to be done (extra circuitry etc) to get the DXE Clifton Lab amp to work with a K2 and essentially mirror the functionality of Jack Smith’s one?

Paul Gacek
W6PNG/M0SNA

> On Feb 15, 2019, at 9:41 AM, Don Wilhelm <donwilh at embarqmail.com> wrote:
> 
> Jim,
> 
> The IF take-off point normally used for the K2 is at J12 pin 1 which is after the Post-Mixer amplifier.  That point provides a signal that is about equal in strength to the antenna input affords isolation for BFO leakthrough.
> 
> For everyone's information, DX Engineering is selling the Clifton Labs buffer amplifier (but not the specific K2 version that Jack Smith (SK) also sold.
> 
> 73,
> Don W3FPR
> 
> 
>> On 2/15/2019 12:02 PM, Jim KO5V wrote:
>> Good morning,
>> I have a HupRF PAT tap buffer amp board for my K2's IF. I installed an SMA connector on the heatsink panel
>> when I built the rig.
>> Looking at the K2's block diagram, the IF is shown between the mixer and post-mixer pre-amp. On the schematic,
>> that appears to be between Z6, pin 2, and C159. My plan is tap the mixer-side of C159, then attach the ground
>> braid to the ground side of R80. Is this the right way to do this?
>> I've searched this reflector, and the web, and I can't really find anything specific using "K2 IF out", etc.
>> SDR kits' site (they sell G4HUP's kits since Dave passed away), and the HupRF site have no instructions for
>> Elecraft rigs. There are links to installation instructions in the most popular Yaekencom radios, but not the K2,
>> even though they are selling the K2 boards.
>> Thanks again. 73,
>> Jim KO5V
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