I have a K3s/10 (12 watt version) which I intend to use in the upcoming cq
ww cw contest. This unit does not have KPA3A power brick and cooling fans
installed.
While doing some trial runs I noticed that the area around the KLPA3A power
transistors is getting fairly hot after prolonged contest use
3000K VERY yellow... I wouldn't be able to see anything. I look
for highest possible... 5000K minimum
73,
Clay
On 10/23/2017 11:36 PM, Dave Cole (NK7Z) wrote:
Here is the review of these lights...
https://www.youtube.com/watch?v=zJWssuCGkC8
73s and thanks,
Dave
NK7Z
http://www.nk7z.
Part of the reason they look so yellow is the low CRI, or color rendering
index. Many bulbs lack deep red, so they look yellow even though they meet
the color temperature spec, they do it by having blue and more yellow and
tricking the measurement. Note that the CRI normally used is still not that
I must have at least 30 LED bulbs around the house ranging from ½W to 23W (eq.
to 120W incandescent flood light).
Most are in the range of 25 to 60 Watt equivalent (200 to 800 Lumens).
Some are 5 years or more old and are from many different manufacturers.
The distance to antennas is anywhere fro
The only time I've noticed RFI issues from CFL or LED bulbs is when they
are being excited by RF. I've measured 3 or 4 different ones of
different brands and wattage ratings. This was done using a fixture
where by the bulb was mounted on a suitable surface in a socket with the
transmit antenn
Nick,
It all depends on your perception of "fairly hot".
My 'rule of thumb' is that if you can hold your fingers on the surface,
then it is not too hot.
73,
Don W3FPR
On 10/24/2017 7:27 AM, Nick - VE3EY wrote:
I have a K3s/10 (12 watt version) which I intend to use in the upcoming cq
ww cw
Nick,
What is the "12 watt" version you're referring to?
73
K0PP
On Oct 24, 2017 5:29 AM, "Nick - VE3EY" wrote:
> I have a K3s/10 (12 watt version) which I intend to use in the upcoming cq
> ww cw contest. This unit does not have KPA3A power brick and cooling fans
> installed.
>
> While doin
My big worry with regards to LED lights is that they have parts that are
sourced from different makers from run to run...
You get LED lights that on one run are dead quiet, and on subsequent
runs are not quiet...
I bought 20 of these bulbs, after testing one, and so far they all
appear quiet
The K3/10 will output 12W.
That said, based on IMD measurements I have performed I would NEVER run a K3/10
at 12W out. Frankly, with my K3S with the latest rev KLPA3A to keep 3rd order
IMD below 30 dBc, I would throttle it back even more above 18 MHz.
Wes N7WS
On 10/24/2017 6:27 AM, Rose
The K3/100 switches to the KPA3A at 12 watts. So is there a 2w range
(10-12w) where the KLPA3A is putting out unacceptable IMD? Is there a way to
make the switch at 10w, or should we just avoid that 2w "danger zone"?
73
Mike KD8RQE
In a message dated 10/24/2017 10:56:38 A.M. Eastern D
On 10/24/2017 5:55 AM, Bob McGraw K4TAX wrote:
When the transmitter was activated, the spikes of noise appeared.
With the transmitter off, the spikes again were not present. Not a
real analytical or scientific method but some degree of indication
that some are better than others, some are w
Yes, exactly my point.
Although one may find the local AM or FM station is "exciting" these
lamps, be they CFL or LED. They may, to some extent, generate the crap
we hear. For us hams, when we transmit the noise may be produced but
is not of concern in as much as they are quiet when we rece
I agree and I have previously mentioned this on the Elecraft list. it
would be nice if you could control when the 100W PA engages. I would
prefer 10 watts.
John KK9A
KD8RQE wrote:
The K3/100 switches to the KPA3A at 12 watts. So is there a 2w range
(10-12w) where the KLPA3A is putting out una
A few weeks ago several folks here were discussing the hanging of an
antenna line with a quadcopter and were wondering what's available to allow
a quad to drop a line over a tall tree or other structure.
https://ae5x.blogspot.com/2017/10/using-quadcopter-to-hang-antenna-line.html
I just finished
Looks neat and like a lot of fun, but around here I could hire more than
half a dozen climbs by an insured expert for the >$800 cost of the system.
And they install a screw eye in the trunk for a stable and nearly permanent
attachment. I have them install a pulley attached to the screw eye so I can
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