Knowing what I did while transmitting at 100 watts of msk144, I’m surprised the
damage isn’t worse.
The protection circuits did the best they could of.
If you own any amp, you always need to be aware of the risk. I would never rely
on the automation to 100% protected any amp.
If you are
"The support team at Elecraft got back to me and the required parts to repair
the board are on the way. Nice job guys."
But the question remains - Why didn't the designed-in protections work? This
new KPA500 owner would appreciate an answer from Elecraft.
Andy, k3wyc
This still confirms the KPA500 is a darn near bullet proof amplifier.
And likewise from the company, excellent support.
Glad the issue was only minimal damage.
73
Bob, K4TAX
On 11/19/2018 4:30 PM, Michael Walker wrote:
Just an update on the repair
Turns out that the first part of the 6M
Just an update on the repair
Turns out that the first part of the 6M LPF took the hit on the amp
resulting in a CAP or 2 vapourizing. AKA - phasers set to kill. This
required no special electronic skills to find. You could see it and smell
it.
The support team at Elecraft got back to me and
adio, you should see an asterisk (*) in the LCD window
> that
> > tells you the amp is "keyed".
> >
> > You may have blown up the input attenuator. Or the RF deck. Or both. As a
> > machine I used to work with said when its power supply was overheating:
> > same PTT as the radio, you should see an asterisk (*) in the LCD window
> that
> > tells you the amp is "keyed".
> >
> > You may have blown up the input attenuator. Or the RF deck. Or both. As a
> > machine I used to work with said when its power supp
with said when its power supply was overheating: "$$$
> UP IN SMOKE!".
>
> 73
>
> Lu Romero - W4LT
>
>
>
>
> From: Michael Walker
> To: Andy Durbin
> Cc: "Elecraft@mailman.qth.net"
> Subject: Re: [Elecraft] Killed the KPA500 :)
>
Mike;
If you haven’t done so already, please call the customer support guys down in
Watsonville. They should be able to help you with the situation. They may ask
for a fault log from your KPA500 - if so please provide it. I will try to
quickly turn around the analysis that I do each time one
d when its power supply was overheating: "$$$
UP IN SMOKE!".
73
Lu Romero - W4LT
From: Michael Walker
To: Andy Durbin
Cc: "Elecraft@mailman.qth.net"
Subject: Re: [Elecraft] Killed the KPA500 :)
Message-ID:
Content-Type: text/plain; charset="UTF-8"
I
" I thought the KPA500 was designed to protect against that user error. Seems I
was wrong. "
According to the KPA500 Owner's Manual the KPA500 should react to excessive
drive by first switching in the attenuator and, if that is not sufficient drive
reduction, issuing hard fault 06 and
My KPA500 is configured to power on in STANDBY, but it stays in OPERATE
On Fri, Nov 16, 2018 at 9:57 AM Bob McGraw K4TAX
wrote:
> You can configure the amp via the MENU to power up in the stand-by mode.
> Also have it go to stand-by when changing bands.
>
> You should have the amp connected to
now for the rest of my message:
It stays in OPERATE when I change bands. I would like for it to revert to
STANDBY when I change bands, but can't find how to configure it to behave
that way. I welcome the information on how to do so.
Thanks,
Dave - K9FN
On Fri, Nov 16, 2018 at 10:08 AM David
See manual page 19 PWR ON Also BAND CHG is the other parameter.
Good luck with the repairs.
Bob, K4TAX
Sent from my iPhone
> On Nov 16, 2018, at 8:56 AM, Michael Walker wrote:
>
> Thanks all
>
> I'll check the menu. I certainly don't remember it being there, but I will
> have a 2nd
Sorry
I don't use a K3 and it was a mistake in my in head checklist.
Mike va3mw
On Fri, Nov 16, 2018 at 9:56 AM Bob McGraw K4TAX
wrote:
> You can configure the amp via the MENU to power up in the stand-by mode.
> Also have it go to stand-by when changing bands.
>
> You should have the amp
Thanks all
I'll check the menu. I certainly don't remember it being there, but I will
have a 2nd look once I reassemble it and remove the smoked parts.
I have the schematics now.
Thanks, Mike va3mw
On Fri, Nov 16, 2018 at 9:13 AM Mike Cox wrote:
> It's a MENU selection ... See MENU>PWR--ON
You can configure the amp via the MENU to power up in the stand-by mode. Also
have it go to stand-by when changing bands.
You should have the amp connected to the K3 via the multi conductor cable and
not use the amp key cable.
The amp follows the radio and none of this will happen.
Bob,
be.
73 de Ray
K2ULR
KX3 #211
-Original Message-
From: Ken Wagner K3IU
To: Michael Blake ; Michael Walker
Cc: Elecraft Reflector ; Andy Durbin
Sent: Fri, Nov 16, 2018 9:05 am
Subject: Re: [Elecraft] Killed the KPA500 :)
Me too... or mine too.
73
It's a MENU selection ... See MENU>PWR--ON ...
On 11/16/2018 8:57 AM, Michael Blake via Elecraft wrote:
My KPA500 does not power up in operate. It always powers up in Standby.
73 - Mike - K9JRI
On Nov 16, 2018, at 8:52 AM, Michael Walker wrote:
I have the schematics, as someone was
Mine also always powers up in standby...
73 Jeff kb2m
-Original Message-
From: Michael Blake via Elecraft
Sent: Friday, November 16, 2018 8:57 AM
To: Michael Walker
Cc: Elecraft Reflector ; Andy Durbin
Subject: Re: [Elecraft] Killed the KPA500 :)
My KPA500 does not power up
"My KPA500 does not power up in operate. It always powers up in Standby."
Mine too. I also drop to STBY on band change. Both are user configurable and,
since this is my first amp, I chose settings that leaned towards safety rather
than operator convenience. I forget what the defaults were.
The power up state, “standby” or “operate”, is programmable. I’ve always
felt is was safer to have an amp power up in standby in most cases. Some
remote operators may want it to power up in “operate” but would have to
take measures to ensure the exciter was in standby at the time.
Ken
WA2LBI
Me too... or mine too.
73, Ken K3IU
~~
On 11/16/2018 8:57 AM, Michael Blake via
Elecraft wrote:
My KPA500 does not power up in operate. It always powers up in Standby.
73 - Mike - K9JRI
On Nov 16, 2018, at 8:52 AM, Michael Walker wrote:
I have the
My KPA500 does not power up in operate. It always powers up in Standby.
73 - Mike - K9JRI
> On Nov 16, 2018, at 8:52 AM, Michael Walker wrote:
>
> I have the schematics, as someone was kind enough to send them to me.
>
> Yes, I forgot the KPA500 powers up in Operate. It is the only Amp
I have the schematics, as someone was kind enough to send them to me.
Yes, I forgot the KPA500 powers up in Operate. It is the only Amp I own
that does this.
I will mention it to Elecraft when I chat with them later today and suggest
the default should be the other way around.
Mike va3mw
On
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