[Elecraft] So here is one that has me stumped...

[Don Wilhelm]

George,

What happens when you transmit into a dummy load?
What happens if you connect the K3 directly to the tuner (remove the amp 
from the path of coax)?

If my understanding of your setup is correct, the K3 will indicate the 
SWR it sees into the input of the amp.
OTOH, the amp sees the SWR at the input to the tuner.

It sounds like you may have a problem with the tuner or the amp or the 
coax between the amp and tuner.
You could also have an RF feedback problem that is causing your SWR 
readings to be crazy.
Some work with an antenna analyzer may be helpful.

73,
Don W3FPR

On 11/6/2013 12:17 AM, George Pontiakos wrote:
> Out of the box, fired 7729 up…set the configuration to the quick start (which means all I did was select the external spkr set to 1). running thru a LDG AT600 pro auto tuner…and an AL-811…
>
> All ran fine, great report across the bands…called Dave at Elecraft for some help on setting the Sql to the RF collar…great accessibility and customer service….
>
> Came back from dinner….high SWR (ant is a Cobra Senior)
>
> Nothing else changed…but I get untransmittable SWR off of both dipoles….really high….I tried the following:
>
> 1.) Checked against both antenna's…both way high
> 2.) Switched Baluns….same result
> 3.) Switched Ant on the LDG…no joy
> 4.) Tried all Bands with the Tune press against both Ant…no joy
> 5.) When I flip on the Amp…running 35 watts…the SWR's on the LDG show pinned…on the K3 display show @ 1.2…
> 6.) Receive works great
> 7.) Replaced the coax from the K3 to the Amp…
> 8.) Cut and restripped the ladder line
>
>
>
> Receive is fine….cannot transmit since the simple allocation of the RF collar to the SQL function…
>
>