[Elecraft] Killed the KPA500 :)

[Nr4c]

Mine has never started up in ‘Operate’ mode. Could it be a setting you imposed?

Sent from my iPhone
...nr4c. bill


> On Nov 16, 2018, at 2:19 PM, Luis V. Romero <lromero56 at tampabay.rr.com> wrote:
> 
> Michael:
> 
> The KPA500 defaults to power up in STANDBY but is programmable to power up
> in OPERATE mode. Someone must have changed yours.
> 
> The KPA500 can also be programmed to switch to standby on band changes. It
> defaults to selecting STANDBY or OPERATE per the last band change.
> 
> When connected to a K3 using the KPAUX cables, the amplifier and the radio
> communicate and the radio will reduce power when you switch the amp to
> OPERATE.
> 
> I run mine in Power up: STANDBY, Band change: Switch to STANDBY.  Its harder
> to do stupid things in this configuration. I'd rather accidentally transmit
> at 100w than blow the amp up. Also, my KAT500 tuner can auto bypass the amp
> if the SWR reaches 2.5:1 threshold to protect the amp. This is also
> programmable.
> 
> The menu settings for all of this are in the KPA500 Operations Manual on
> page 19.  BTW, there is no T/R relay to click in the amp. It uses PIN Diode
> T/R switching.  When you key the amp, and if you have it connected to the
> 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 supply was overheating: "$$$
> UP IN SMOKE!".
> 
> 73
> 
> Lu Romero - W4LT
> 
> 
> 
> 
> From: Michael Walker <va3mw at portcredit.net>
> To: Andy Durbin <a.durbin at msn.com>
> Cc: "Elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] Killed the KPA500 :)
> Message-ID:
>    <CA+33ts5vyMXY7o1vHi=8HoNaX4cKLsKhHfYR8te4-qYf8SeBqw at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
> 
> 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
> 
> 
> 
> 
> 
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