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

[Dale Putnam]

The one piece left unchecked, (in my mind and I may have missed something here) is the coax between the KX3 and the tuner.It sure wouldn't be the first time I got caught with a short piece of coax that failed at the exact "right" time... can you spell MURPHY???;-)

Have a great day, 
 
 
--...   ...--
Dale - WC7S in Wy
 
 


> From: pontiakos at monovasia.com
> Date: Wed, 6 Nov 2013 09:40:44 -0700
> To: don at w3fpr.com
> CC: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] So here is one that has me stumped...
> 
> 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…
> >> 
> >> 
> > 
> > 
> 
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