[Elecraft] Sudden loss of K3 RX sensitivity

Jack Brindle jackbrindle at me.com
Tue Feb 23 15:54:37 EST 2021


Pete;

Always do what the master says. Keith knowns more about the K3 than almost anyone.

That 3db figure stands out for me, though. For a component failure or a misadjustment I would expect something else. This sounds more like the antenna is being split, going to another place along with the main RX input. Is it possible you are feeding the same antenna input to both main and sub RX?

It will be interesting to see what you and Keith come up with.

73!
Jack, W6FB

> On Feb 23, 2021, at 12:00 PM, Keith Trinity WE6R <keith at elecraft.com> wrote:
> 
> Hi Pete;
> RF gain up?
> Adjust width to click thru all filters.
> Does ATT/Pre change the sensitivity? (if not, it could be something in that circuit).
> Try the RX antenna BNC input (if KXV3 equipped).
> Try Ant 2 (if KAT3 equipped).
> If good at RX ant, then most likely D26 or 27 on RF board.
> If bad at RX ant too, then could be D5 on older KXV3 or D25 on RF board.
> Email me, I have a flow-chart picture I can send you to help.
> keith at elecraft.com  WE6R K3 Tech.
> ______________________________________________________________
> 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 jackbrindle at me.com



More information about the Elecraft mailing list