You may keep them both connected. That's what I do.
73 de Bob, K6XX
On Aug 15, 2012, at 2:08 AM, eric norris wrote:
> I want to try keying my KPA500 with a KX3. The KPA500 is connected to my K3
> via the serial-like cable. THE QUESTION: Can I just turn the K3 off and use
> the RCA KEY line
The powered-off K3 loaded down the KEY IN line, placing the KPA500 in
transmit mode. It was drawing bias current, dissipating heat. After a
while, the heat sink temperature rose to the FAN1 threshold and the fan
came on.
As you said, the solution is to turn off the KPA500 (or place it in STBY
This parameter is saved separately by band. Could that be the problem?
73 de Bob, K6XX
On 4/16/2012 1:58 PM, W0MU Mike Fatchett wrote:
> I keep setting the Data MD to 45 baud fsk and somehow the radio has gone
> back to 75 baud a couple of times on it's own. Anyone else seen this?
> Using MMT
The KX1 is expected to draw more current on 80m. This is documented in
the manual...
Regards,
73 de Bob, K6XX
On 4/16/2012 8:56 AM, Bob Tomas wrote:
> Hi,
>
> I have had a KX1 for a couple of years now. I was running some tests after
> a repair recently and noticed that
> in receive mode, the
I bet your power supply is running right at its current limit. When the
supply's limit is momentarily exceeded, its output voltage drops below 11.0V
and the K3 shuts down.
73 de Bob, K6XX
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.
Sounds like RF is getting into the temperature meter circuit. Probably
not a big deal, as 5C is only one fan speed step, but might as well
clean it up.
73 de Bob, K6XX
On 2/10/2012 12:30 PM, Mike Walsh wrote:
> Hi and thanks for the replies.
>
> However, I think people are misunderstanding my
Here is how I toggle KPA500 power from the K3 front panel. I have used it
for a couple of months on my remote station that is controlled by a
prototype K3/0 terminal. It consists of a K3 macro and an additional wire in
the AUX cable between the K3 and the KPA500. This simple control is all that
is
Why Per Band OPER/STBY is not really necessary...
Since you use ANT2 for 30m & 60m, and since you use power = PER BAND, just
set both the OPER mode and STBY mode power to 100W (or 50W on 60m). The K3
will transmit at that power whether the amp is in OPERate mode or STBY or
OFF.
OPER mode power is
I believe the most significant contributor to key-down power sag is the
increase in MOSFET channel resistance with temperature. As the MOSFETs heat,
their ON resistance increases slightly, which drops output power slightly.
Fortunately this is a small effect, especially when measured in dB.
73 de
My solution to the small OPER button? Use the menu command PWR ON > OPER to
tell the amp to go straight to operate mode when switched on. This way, the
large power button is the only control necessary. Whenever the amp is on, it
is ready and active.
73 de Bob, K6XX
> -Original Message-
You aren't getting the KEY IN signal so the amp thinks it is in receive
mode. Is the asterisk in the display?
73 de Bob, K6XX
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
> vtnn...@comcast.net
> Sent: Tuesday,
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