Hi
Just started using the QRQ for the first time with the KPA-500. WOW slick or
what!
Maybe a dumb question but I'll ask the panel anyway, I suppose it will run all
day and everyday at 35 - 40wpm during iota contest!!!
My other query is TR TIME in the KPA menu, should this be set to 0 zero for
My recently built K2 - no options - exhibits an odd behavior. When I
push the A/B button it occasionally pauses for a moment like it is
thinking - and changes modes instead. This happens in every combination
I have tried, working split, or just changing from VFO A to B or B to A
or using
Hi Phil,
same results here. Sometimes i work AM on 80m and i get outstanding reports
from the oldtimers.
I use a headset from Sennheiser, the TX-EQ and a tube amplifier. 100W with
unmodulated carrier and nearly 400W PEP with modulation !!! I`d never saw
that with other modern equipment...
73
Pink with green stars is the choice for the K3-limited edition...
73
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GM OM,
I have gone through the S meter Zero and Sensitivity a couple of times and am
sure I'm doing it BTB, but indications of incoming signals seem low to me.
Signals that I think should be a least a 7 or even a 9 are indicated as a 2 or
3? I even put the DSP in bypass before calebrating the
Mike,
First make sure you have the RF Gain set fully clockwise, and then
adjust the AGC Threshold to 3.8 volts or a little lower (never higher).
The adjust CAL S-LO with no antenna connected just to the point where
there are no bars illuminated in any mode.
Now, if you have a source of 50 uV RF
Hi, all concerned:
In the next six months or so, I will be moving to an in-law suite in the
Jacksonville FL area, exact location unknown.
In the last 5-6 years, I've put a decent ELECRAFT-ALPHA station together in
Cincinnati. The antenna system can be seen on qrz.com, googleearth, and
Mike,
I forgot to add that for best results, do those adjustments on 40 meters
with the preamp OFF.
You will then find the readings are about right for those bands where
you would normally use the preamp (20 meters and above).
73,
Don W3FPR
On 7/30/2011 1:43 PM, Don Wilhelm wrote:
Mike,
John,
That sounds like there is some sort of path between the BANK1 and BANK2
signal lines on the front panel board.
Did you attempt to clean the board of solder flux? If so, you may have
left some residue on the board (likely under the switches) that now must
be completely cleaned, even if
When running the KPA500 on AM, it there any time limit before unkeying?
While operating, the fan comes on and then it kicks into another speed.
Thanks
Phil
Philip LaMarche
LaMarche Enterprises, Inc
mailto:p...@lamarcheenterprises.com p...@lamarcheenterprises.com
Phil,
AM with its 50% power carrier and sidebands that change in amplitude
should present a less harsh situation than RTTY which is 100% duty
cycle. There have been reports of running RTTY for an extended time
with no harm. But the specification says 500 watts with 10 minutes key
down and 5
That should actually about 25% carrier.
125-150 watts carrier - 500-600w PEP AM. Shouldn't be any problem for the
KPA-500. Presuming one doesn't make an hour long old buzzard transmission.
Sent from my iPhone
On Jul 30, 2011, at 2:24 PM, Don Wilhelm w3...@embarqmail.com wrote:
Phil,
Don,
AM with its 50% power carrier and sidebands that change in amplitude
should present a less harsh situation than RTTY which is 100% duty
cycle.
AM carrier power is 25% of PEP (not 50%). The RF voltage and current
are each 50% of peak values which makes power 25% of peak. The US
legal
Don - Thanks for the e-mail. I didn't clean the board, so that's OK.
After I got your email, and the response of the reflector seemed to say
that this isn't a common issue, I started to look at the schematic
around U3. What I did notice is that the two switches share a common
data line (D4)
At low heat levels, the fans operate at low speeds.
As the temperature of the PA rises, the fans increase in speed (and they're
louder). Depending on humidity, ambient temperature, and the free space
around the amplifier, the increased fan speed moves heat energy out of the
amplifier.
If the
Worked ST0R on two bands so far, both using the KPA500, SB on 20 mtrs and 15
mtr RTTY.
Ran the amp at reduced input on RTTY for 200 watts out, fan didn't even come
on.
Trying for qso on 20 cw is challenging. Generally the amp is running around
50 deg C after extended ops.
--
View this message
Using the AF1 along with my Elecraft KX1 and the Miracle whip antenna I found
the AF1 while transmitting with the KX1 at 1.2 watts was being affected by the
RF from the rig. When I used the auto tuner on the KX1 with the AF1 turned on I
would hear buzzing and clicking in my ear buds. Also
Hi Don,
Reposting Here I don't think my post are making in via outlook. Anyway here
is where I am at.
1. Yes I have 12 volts on the cathode of D14, but no voltage on the anode.
D19 had 12 volts on the cathode and 6 volts on the anode.
2. Been over the jumpers about 10 times now. My
Many thanks for all the responses regarding AM operation. I'm good to go
and am happy to use the K3 on AM, having gotten rid of my heavy metal.
Everyone have a great weekend.
Phil
Philip LaMarche
LaMarche Enterprises, Inc
p...@lamarcheenterprises.com
www.LaMarcheEnterprises.com
John,
Thanks for the reminder about the pullup resistors - check RP1 to be
certain pin 1 (the end with the dot) is at the same end as the 1
silkscreened on the board. Most of the R-paks in the K2 can be swapped
end for end, but not that one.
73,
Don W3FPR
On 7/30/2011 3:49 PM, John Oglesby
Joe,
You are correct - I was looking at the RF voltage - not the power.
73,
Don W3FPR
On 7/30/2011 3:47 PM, Joe Subich, W4TV wrote:
Don,
AM with its 50% power carrier and sidebands that change in amplitude
should present a less harsh situation than RTTY which is 100% duty
cycle.
AM
~
N2CQ QRP CONTEST CALENDAR
August 2011
~
Islands On The Air Contest (CW/SSB) ... QRP Category
Jul 30, 1200z to Jul 31, 1200z
Rules:
Mike, your description does not say how close that miracle whip is to the
KX1. Often they are mounted right on the radio. That puts the RF field as
close as possible to the KX1 and AF1.
The second thing I'd do is connect a (roughly) 1/4 wavelength long wire to
the KX1 case to provide a lower
David,
First - those diodes across the relays do not control anything, they are
there only to absorb the reverse polarity voltage kickback when the
relay opens. That means when a relay is active, you will have 12 volts
on the cathode and close to zero on the anode. So K4 is activated, but
OK, I'll admit it. I'm more excited about this radio than any piece
of gear I can remember in the last 10 years. This little radio
is going to be a huge success for Elecraft. We are all going to have
to try to think about something else for the next 6 months!
And so, I think Eric and the guys
I was thinking of asking about making a deposit on one just yesterday. I
whole heartedly agree with this plan!
73,
Kevin. KD5ONS
On Sat, 30 Jul 2011 15:17:47 -0700, 7000...@gmail.com wrote:
OK, I'll admit it. I'm more excited about this radio than any piece
of gear I can
Could we order more than one and sell for an upcharge? Like some car models
in high demand.
73,
Bill
K9YEQ
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kevin Rock
Sent: Saturday, July 30, 2011 5:25 PM
To:
On 7/30/2011 12:58 PM, KD3RF wrote:
Worked ST0R on two bands so far, both using the KPA500, SB on 20 mtrs and 15
mtr RTTY.
Ran the amp at reduced input on RTTY for 200 watts out, fan didn't even come
on.
Can someone tell me what I could expect from my KPA500 working the ST0R
pileup that I
I realized later that I didn't include the audio lead between the K2 and AF1
in bypassing suggestions. Any bit of wire connected to the AF1 can,
potentially, bring in RF, and your description of the interference
(distorted sound, buzzing, clicks, etc.) are all strongly suggestive of
enough RF
On 7/30/2011 3:32 PM, Bill K9YEQ wrote:
Could we order more than one and sell for an upcharge? Like some car models
in high demand.
Bill, given this group, you could get a place on the list and then sell
*the place*. If serial numbers were absolutely sequential, an earlier
slot on the list
I replaced Q2 and now I have the voltage on R16, and I am able to change the
Receiver RF Ap bia. Starting it off at 179 mV. I am able to get it above
200 with no problems. One transister off, at least I have two good
transisters nwo.
Updating the Schematic now for the IF and Control circuits.
Nope - only that you are working him with an Elecraft product and this is
the Elecraft reflector. ;-) ;-)
73,
Tony W7GO
On 7/30/2011 3:39 PM, Fred Jensen wrote:
On 7/30/2011 12:58 PM, KD3RF wrote:
Worked ST0R on two bands so far, both using the KPA500, SB on 20 mtrs and 15
mtr RTTY.
Ran
I believe he heard you Gabor.
Do Hams cheat?
73.
John.
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73.
John.
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David,
Well, most all XV transverters out there have this problem and operate
without obvious symptoms. The situation is that there is no diode
across the K5 coil to absorb the kickback voltage from the relay coil
inductance when the power to it is removed. If you find the time
between
I noticed when I covered my KPA500 with a towel, the next morning It feels
slightly warm on the bottom and top over the Transformer.
I thought that was curious since it had been off all night.
I turned the power switch off on the rear panel and the heat went totally away.
I wondered if there
The weekly Elecraft SSB net will meet tomorrow (7/31/11) at 1800Z on 14.3035
MHz +/- QRM. I will be net control from western Oregon, and we'll
try relays to pull in the stations that I can't hear. See you there.
73,
Phil, NS7P
__
Ron,
The KPA500 has a POWER ON/OFF input. In order for that to function,
there must be some part of the KPA500 active, and those active circuits
will generate some heat, however slight that may be. Your towel
concentrated that heat and made it obvious. If you were to cover your
instant-on
Thanks Don,
That helps to further explain the design criteria and makes perfect sense.
Ron Durie
IT BUYER JAARS INC
704-843-6011
-Original Message-
From: Don Wilhelm [mailto:w3...@embarqmail.com]
Sent: Saturday, July 30, 2011 9:16 PM
To: Ron Durie SIL.org
Cc: Elecraft@mailman.qth.net
I'm looking at getting the KPA500, but need to find a way to ground my K3 as
well as the KPA500. I'm about 12 floors up in a high-rise and people have
suggested to me that I should look into an artificial ground. Are there
other suggestions, and artificial ground recommendations as well?
Any help
On Sat, Jul 30, 2011 at 6:24 PM, Fred Jensen k6...@foothill.net wrote:
If serial numbers were absolutely sequential, an earlier
slot on the list should be worth more than a later slot. It sort of
resembles commodity futures?.
==
Well, not commodity futures. That's a
Here's some back-ground (hi hi): http://www.w8ji.com/ground_systems.htm
Leigh/WA5ZNU
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Thanks Leigh, this is very helpful.
On Sat, Jul 30, 2011 at 9:03 PM, Leigh L. Klotz Jr WA5ZNU
le...@wa5znu.orgwrote:
Here's some back-ground (hi hi): http://www.w8ji.com/ground_systems.htm
Leigh/WA5ZNU
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View this message in context:
Yes Fred, I wondered the same thing. X watts is X watts,
regardless of whose product it comes from. Maybe the
initial poster was assuming there was extra Elecraft MoJo
mixed into the output of the KPA500. (:-)
73! Ken Kopp - K0PP
Some of us will go to considerable length to
obtain gear with S/N relationships that only
make sense to us. (:-)
73! Ken - K0PP
K2 #56 65
K3 #56
P3 #56
But Rose says I can't buy K3 # 56 65, due out soon (:-(
__
Elecraft
Grounding to the AC receptacle round connector will normally suffice
for AC mains and safety ground.
As for RF ground, you may get away without it depending on your antenna
situation. If you have RF in the shack problems, counterpoise wires
may be the best solution. A quarter wave wire for
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