Posted by
Christophe GIBERT on
Jun 07, 2020; 4:55pm
URL: http://elecraft.85.s1.nabble.com/K2-showing-Lo-P-on-10-meters-and-no-transmit-power-tp7661634p7661807.html
Hi Don, I've made some troubleshooting today.
Without the KAT2, I've got no power on 10 meters.
Visually all is good at bandpass filter for 10/12 meters. I've remade some joints but the problem remains.
With the troubleshooting of page 14, here are the values :
U10 pin 4 : 0.012 Vrms
U9 pin 6 : 0.293 Vrms
W6 : 0 or near 0 V
So in S1 anode : 0 V or near... It seems to incriminate the bandpass filter or am I wrong ?
Please tell ...
Thanks a lot.
--
Chris
________________________________
De : Don Wilhelm <
[hidden email]>
Envoyé : jeudi 4 juin 2020 17:34
À : Christophe GIBERT <
[hidden email]>; Elecraft Support <
[hidden email]>;
[hidden email] <
[hidden email]>
Objet : Re: [Elecraft] K2 showing Lo P on 10 meters, and no transmit power.
Chris,
The LoP message indicates that there is not enough power to tune the KAT2.
As your first troubleshooting test, unplug the KAT2 (both cables) and
try again - connect a dummy load to the lower BNC jack on the base K2.
See if you get power output on 10 meters. If not, look carefully at the
bandpass filter for 10/12 meters.
If the bandpass filter is OK, then you will have to do Transmit Signal
Tracing. Build the RF Probe if you have not already done that and turn
to the Troubleshooting appendix in the manual. Do the troubleshooting
on page 14. Use 10 meters instead of 40 meters, and tell me at which
point the RF voltage is significantly (more than 10%) less than the
expected voltage.
73,
Don W3FPR
On 6/4/2020 9:59 AM, Christophe GIBERT wrote:
> Hi folks, I'm done in the building of my #7855 K2 and his KAT2.
>
> I've got a problem on 10 meters.
>
> For example I put the VFO on 28 360 Khz and I press down TUNE, to tune.
>
> The screen shows a "Low P" message. When I try to transmit on this band, where is no power at all, the S Meter not move at all. (Problem with my antenna connected even with a good 50 ohms dummy load). All is good on the other bands.
>
> My K2 is KAT2 and KSB2 equiped.
>
> Some idea on where investigate ?
______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.htmlMessage delivered to
[hidden email]