[Elecraft] K4 RX routing?

[Wayne Burdick]

Jim,

Here's a short answer for now. As I posted earlier, the manual will cover this in detail. Bottom line: you won't need any external splitters.

There are two RX antenna inputs (RX IN 1 and RX IN 2) on the K4. Either can be used with the main receiver, sub receiver, or both. Also, one of the three antenna jacks associated with the KAT4 ATU (ANT 1/2/3) can be selected as a receive-only antenna for use with either or both receivers.

This makes a total of 5 possible RX antenna sources. The user interface makes this very easy, with a switch for selecting the RX antenna for each receiver.

To your point: Whenever the two receivers are sharing an antenna (either RX IN 1/2, or the TX antenna, or the specified RX-only ATU antenna), a 3 dB splitter is engaged.

Note that the above applies to the K4D and K4HD. In a basic K4, you can still do dual receive (even on different bands), but since there's only one A-to-D converter in this case, one antenna input (of 5 possible) would be selected for the main RX, and the sub RX, when turned on, would share this antenna inherently (since both receivers would be derived from the same ADC).

73,
Wayne
N6KR


> On Nov 18, 2019, at 8:52 AM, Jim Miller <jim at jtmiller.com> wrote:
> 
> Like many I'd like to get the feed from my RX antenna to both the RX in and
> Aux in. Some just do a parallel connection while others use a splitter.
> 
> Does the K4 have any tricks up its sleeve to do this without an external
> splitter?
> 
> Thanks
> 
> Jim ab3cv
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to n6kr at elecraft.com