[Elecraft] Problems with KRX3A

[Clark Macaulay]

Gareth,

I had a similar problem when my K3 returned from the factory after a few
updates.  In my case, I had to press and HOLD the RX ANT button.  Don't
remember where I read this but it worked.  Toggling this switch changes the
Sub Rcvr between the main antenna and the receive antenna as the signal
source.

The K3 is a remarkable flexible radio.  With that flexibility comes
complexity at times that is hard to fathom--at least for me.

On Wed, May 27, 2020 at 9:50 AM Gareth M5KVK <gareth.m5kvk at gmail.com> wrote:

> Great minds, Grant. That's my next step.
>
> As I said in the OP, this was a rig bought secondhand.
>
> Gareth M5KVK
>
> On 27/05/2020, 14:35, "Grant Youngman" <ghyoungman at gmail.com> wrote:
>
>     Have you checked the installation of the receiver module?  Meaning
> that the two small riser modules that it plugs into are properly seated to
> the main RF board and the KRX3.  I had a dead sub-receiver problem once.  I
> had been in the radio at some point to install an update.  When
> reinstalling the KRX3, I had pinched one of the coax cables that’s in the
> vicinity of the riser nearest the front of the radio and pulled the cable
> out of it’s socket when reinserting the KRX3,  far enough not to work, but
> not so far that I noticed it until the next time I tried using the sub.
>
>     Just one more idea of something to look at.
>
>     Grant NQ5T
>
>     > On May 27, 2020, at 9:21 AM, Gareth M5KVK <gareth.m5kvk at gmail.com>
> wrote:
>     >
>     > I tried that, Richard.
>     > ANT definitely says MAIN but still no signal.
>     >
>     > Gareth
>     >
>     > On 26/05/2020, 18:40, "Richard Thorne" <rthorne at rthorne.net> wrote:
>     >
>     >    Gareth,
>     >
>     >    Try this.
>     >
>     >    - Turn on the sub receiver by pushing sub
>     >    - Push and hold B Set so the display shows b set
>     >    - Be sure the ant shows Main and not AUX.  If it shows AUX push
> the ANT
>     >    button to toggle between the two.
>     >
>     >    May not be the problem but I've found for some reason my sub
> receiver is
>     >    on the Aux antenna.  My rig doesn't have the ant tuner either.
>     >
>     >    Rich - N5ZC
>     >
>     >    On 5/26/2020 11:21 AM, Gareth M5KVK wrote:
>     >> Thanks, Richard
>     >> There is no ATU, so there is only the one ANT to select. However, I
> have checked that CONFIG KRX3 has Ant=ATu (even though there is no ATU,
> only this or BNC are offered as options)
>     >>
>     >> Gareth
>     >>
>     >> On 26/05/2020, 16:31, "Richard Thorne" <rthorne at rthorne.net>
> wrote:
>     >>
>     >>     Gareth,
>     >>
>     >>     You probably don't have the correct antenna port assigned to
> the sub
>     >>     receiver.  I'm not in front of my rig, but I believe you need
> to push
>     >>     and hold A/B (B Set) to get to the sub receiver, at that point
> be sure
>     >>     the correct antenna port is selected.
>     >>
>     >>     Rich - N5ZC
>     >>
>     >>     On 5/26/2020 10:05 AM, Gareth M5KVK wrote:
>     >>> Hi there
>     >>> I bought a s/h K3S a couple of years ago (SN 10901). It has a
> KRX3A installed, but I’ve never tried to use it until now. When I enabled
> the sub receiver this morning, I found I was getting no signal.
>     >>>
>     >>> I’ve checked various CONFIG settings and it’s set to use the MAIN
> ANT and it’s AF is independent of the K3S. In an attempt to make progress,
> I reviewed the installation instructions.
>     >>>
>     >>> Item 4, after enabling TECH MD, is Tap DISP and rotate VFO B to
> display SYN1 and SYN2. I do not see these items. Any idea how to debug this?
>     >>>
>     >>> 73
>     >>>
>     >>> Gareth, M5KVK
>     >>
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-- 
73,

Clark, WU4B
Little Pistol With Wires
QRPARCI #10815
SKCC #3892
NAQCC #5055
CWOPS #1869
Collins Collectors #AC90-12432
Southeastern DX Club <http://www.sedxc.org>
North Georgia QRP Club <http://www.nogaqrp.org>


*"It is vain to do with more what can be done with less."*
*Attributed to *William of Occam (1288 AD - 1348 AD)