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

[George Pontiakos]

Thank you for the responses and suggestions:

1.) Ran the ant coax thru the balun directly to the K3- SWR 4.2/1
2.) Ran the ant coax thru the LDG 600 Pro bypassing the amp- high SWR
3.) When I hit the "tune" function on the LDG,  I am getting from the tuner a message "ERR_NO_RF_" blink once warning

The only thing I can think of the LDG has an internal issue, everything else seems correct…I had the exact same set up on my prior rig, same coax etc….worked like a charm…I am beginning to think it is the tuner…

Any other thoughts….I cannot believe I set a config by accident internal within the K3 to cause this issue…

My very best to all,

George

On Nov 6, 2013, at 5:46 AM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> 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…
>> 
>> 
> 
>