Re: [Elecraft] KAT500 Fault

[Dick Dievendorff]

Sounds like the amplifier key line is not connected thru the KAT500.  The ATU 
must be able to break the amp key line during tuning and all other ATU relay 
transitions. 

Dick, K6KR

Sent from my iPhone

> On Oct 2, 2015, at 04:47, dave_w0ru  wrote:
> 
> Fred,
> I am now trying the KAT500 output going to a dummy load. When the K3 is set
> at about 22 watts out, the KPA500 shows 440 Watts out. When I use the Tune
> feature on the K3 with Manual Tune feature on the KAT500, there is no fault.
> However, when I send with the K3 keyer and with Manual Tune on the KAT500, 
> I get a fault on the KAT500. Using the KAT500 utility, I find Fault Code 03
> - VFWD above relay hotswitch limit - VFWD 1551 VRFL 0 SWR 1.00 SWRB 1.00. Is
> the moral of the story to use the K3 Tune control, not the K3 keyer?
> 
> 73 de Dave w0ru
> 
> 
> 
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Re: [Elecraft] KAT500 Fault

[dave_w0ru]

I finally found out the answer. In checking the AuxBus cables, I found a
cable connecting the K3 Key Out to the KPA500 PA Key. Removing this cable
made the fault go away. Perhaps I had followed the Figure 3 on page 23 of
the KPA500 manual at some point. Anyway there is a lot of cabling back
there. 

73,
Dave w0ru




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Re: [Elecraft] KAT500 Fault

[Ron D'Eau Claire]

Right! You want only ONE key line. Note that in Figure 3 (pg 13) the
KPAK3AUX cable contains a key line inside of it. Figure 4 (page 14) show an
external key line cable between the K3 and KPA500 so you can break into it
to control some external gear such as a Stepp-IR antenna controller, but
also shows the "key line interrupter" between the K3 and the KPAK3AUX cable.
The interrupter opens the key line inside the KPAK3AUX cable so it's no
longer active.

Every time I have to recable my K3/P3/KPA500/KAT500 setup - which is almost
daily - I think to myself "Isn't wireless fun?"
 
Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of dave_w0ru
Sent: Friday, October 2, 2015 1:05 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Fault

I finally found out the answer. In checking the AuxBus cables, I found a
cable connecting the K3 Key Out to the KPA500 PA Key. Removing this cable
made the fault go away. Perhaps I had followed the Figure 3 on page 23 of
the KPA500 manual at some point. Anyway there is a lot of cabling back
there. 

73,
Dave w0ru




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Re: [Elecraft] KAT500 Fault

[dave_w0ru]

dave_w0ru wrote
> With the 
*
> KAT500
*
>  in Standby, I can tune with the KAT500 just fine.

That should read:

With the *KPA500* in Standby, 

Dave w0ru



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Re: [Elecraft] KAT500 Fault

[Cady, Fred]

Hi Dave, 
I don't have the full context of your note but here is some information that 
may help:

3.9.5   Tuner Fault Conditions
The FAULT LED being lit does not mean there is an equipment failure to cause 
you concern.  Rather, it indicates a condition that you should correct.
A fault will occur, and the FAULT LED will light under the following conditions:
•   If the RF drive power exceeds 110 watts during a tune operation.  This 
can happen if your amplifier outputs more than 110 watts and the KAT500 does 
not interrupt the keying line while it is tuning.  You should be using a K3–KPA 
Cable as shown in Figure 3 4 or a separate keying line cable as shown in Figure 
3 3.  Note that the KAT500 will not open the keying line if the power input to 
the tuner is greater than 30 watts unless you have configured it as shown in 
Section 3.8.
•   The VSWR of the antenna is higher than the configured Amplifier Key 
Interrupt VSWR Threshold and the red FAULT LED illuminates.  If this occurs, 
the amplifier’s keying line is interrupted.
This fault may occur frequently while the tuner is tuning and will be cleared 
automatically when the tuner is finished and a transmission occurs where the 
VSWR is about 10% lower than the threshold.  If the fault persists, press any 
KAT500 key, change bands, antenna or KAT500 mode, or fix the antenna problem 
and transmit again.  Because this fault may occur frequently, and normally, 
when tuning, it is not written into the fault log.
•   The impedance is outside the normal tuning range (see Table 3.1) but 
the KAT500 is able to match it.  In this case, you should reduce the power as 
needed to protect the KAT500.
To reset a fault, tap the TUNE switch or switch the power off and then on by 
holding the MODE switch. 

73,
Fred KE7X

Author of:
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Portable Elecraft KX3 – Going for the Summit with the KX3 and KX3-2M/4M"
“The Elecraft KX-Line – The Complete Station”
“The Elecraft KPA500 and KAT500 – the K-Line Dream Station”
Printed, coil bound copies of these are all available at www.elecraft.com
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide

KAT500 and KXPA500 Tuner Operation
http://www.ke7x.com/home/kat500-and-kxpa100-tuners

“The Elecraft KXPA100, PX3 and 2M/4M Transverters – Assembling the KX3-Line 
Station” available at www.lulu.com.

“The Elecraft K3S and P3 – Getting the Most out from Your High Performance 
Station”  coming very soon.
A book dedicated to the K3S upgrades for the K3 and a 3rd Edition of the K3 
book are works in progress.




From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> on 
behalf of dave_w0ru <dken...@gmail.com>
Sent: Thursday, October 1, 2015 9:32 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Fault

dave_w0ru wrote
> With the
*
> KAT500
*
>  in Standby, I can tune with the KAT500 just fine.

That should read:

With the *KPA500* in Standby,

Dave w0ru



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Re: [Elecraft] KAT500 Fault

[dave_w0ru]

Fred,
I am now trying the KAT500 output going to a dummy load. When the K3 is set
at about 22 watts out, the KPA500 shows 440 Watts out. When I use the Tune
feature on the K3 with Manual Tune feature on the KAT500, there is no fault.
However, when I send with the K3 keyer and with Manual Tune on the KAT500, 
I get a fault on the KAT500. Using the KAT500 utility, I find Fault Code 03
- VFWD above relay hotswitch limit - VFWD 1551 VRFL 0 SWR 1.00 SWRB 1.00. Is
the moral of the story to use the K3 Tune control, not the K3 keyer?

73 de Dave w0ru



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