[Elecraft] K4 Second RX and VHF

[Wayne Burdick]

The KRX4 option (which turns a K4 into a K4D) comes with two modules: a plug-in digital downconverter board, and a plug-in receiver board. One of them lives in the digital compartment and the other in the RF compartment, which are already shielded from each other, so no additional shielding is needed.

The cabling requirements are simple (coax with very sturdy MCX plugs): one to bring RF into the receiver module, and another to get the filtered receiver output signal to the digital downconverter.

The internal transverter module has its own built-in shield that doesn't have to be removed to do installation. But to ensure signal integrity it requires short, high-quality coax cables for its antenna (ANT4 on the rear panel) as well as for its I.F. input and output. 

73,
Wayne
N6KR


> On Sep 14, 2020, at 9:44 AM, Ed Gray W0SD <w0sd at triotel.net> wrote:
> 
> I keep trying to find a picture for months of the inside of the K4 but I can not find one so I give up and will ask?  How is the second RX handled mechanically.  I just hate the box in the K3S for the second RX.  What a pain as you have to take it out to do things with the filters and all the cabling and routing to me is not good.  I hope this is all gone in the K4.
> 
> Secondly how will VHF be handled in the K4?  Again I am not a big fan of the cabling involved in the K3S for VHF.  A plug is computer type slot, etc. sure seems like it would be better.
> 
> Ed W0SD
> 
> 
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