Sub-rx wont work

[Martin-2]

Guys, the Main-RX and TX of K3 #2878 are up and running, thanks to the
hints from Markus and Chen.

But not the sub-rx.

All plugs mated
Checked the tmp-cables
Performed the calibration
No err-msgs
Sub-RX in config-menu set to *yes, installed*
ant = bnc

no receive, only noise like there is no antenna connected,
noise characteristics change with selected filter (Bandwith/shift)

Faint signals from *strong* stations.

Signals from my K2 sound ok when i transmit into a dummy load and
receive them with the K3 sub-rx.

So the sub-rx is not dead, but deaf.

The K3 has sub-rx, KXV3, equal filters ssb/cw on both rx's , *no* KAT3.

Where to begin the troubleshooting?

Martin

--

73, DM4iM

K2 #2706 , K3 #2878
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[MontyS]

Martin -
What type of antenna do you have attached to the BNC jack?  Which antenna is
selected with the ANT button? Are you listening in a ham band or outside?

Monty K2DLJ

> Guys, the Main-RX and TX of K3 #2878 are up and running, thanks to the
> hints from Markus and Chen.
>
> But not the sub-rx.
>
> All plugs mated
> Checked the tmp-cables
> Performed the calibration
> No err-msgs
> Sub-RX in config-menu set to *yes, installed*
> ant = bnc
>
> no receive, only noise like there is no antenna connected,
> noise characteristics change with selected filter (Bandwith/shift)
>
> Faint signals from *strong* stations.
>
> Signals from my K2 sound ok when i transmit into a dummy load and
> receive them with the K3 sub-rx.
>
> So the sub-rx is not dead, but deaf.
>
> The K3 has sub-rx, KXV3, equal filters ssb/cw on both rx's , *no* KAT3.
>
> Where to begin the troubleshooting?
>
> Martin
>
> --
>
> 73, DM4iM
>
> K2 #2706 , K3 #2878
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html 

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[Martin-2]

Guys, thank you for all the input.
Here's the setup

Config: KRX3 Ant=bnc ( I have no ATU)

2-way antenna switch, 1st. cable to ANT1, 2nd cable to AUX

A: Switch in position ANT1 and MAIN selected: Main RX ok, sub rx a *lot*
weaker.

B: Switch in position AUX and AUX selected: sub-rx  a little better than
before due to the 3-db increase because the antenna now is not shared
with main rx.

C: I also hooked the 2nd cable to RX-IN and selected RX-Ant, but same
performance as B.

What am i missing?


 Martin


--

73, DM4iM
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[Alexandr Kobranov]

What about roofing filters? Are they defined well and in correct slots?
I remember when I put filter to slot #5 instead of #1 and no signal
from KRX3. Just idea what to check...

gl
73!
Lexa, ok1dst


DM4iM napsal(a):

> Guys, thank you for all the input.
> Here's the setup
>
> Config: KRX3 Ant=bnc ( I have no ATU)
>
> 2-way antenna switch, 1st. cable to ANT1, 2nd cable to AUX
>
> A: Switch in position ANT1 and MAIN selected: Main RX ok, sub rx a *lot*
> weaker.
>
> B: Switch in position AUX and AUX selected: sub-rx  a little better than
> before due to the 3-db increase because the antenna now is not shared
> with main rx.
>
> C: I also hooked the 2nd cable to RX-IN and selected RX-Ant, but same
> performance as B.
>
> What am i missing?
>
>
>  Martin
>
>

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