Hello,
Any recomendation for PS for K2?
Which to choose, switching supply or not switching?
Whats the difference between switching supplies and not switching supplies?
Pros and cons...
I'm wondering that ELECRAFT hasn't devoloped PS to match design for K2 or
K2/100?
Thanks
_
K2 #5540 is now alive! It was purchased at Dayton, and first came to
life about 2 weeks ago. It is a base K2 at the moment, but I have
the KSB module on the bench now, and probably will purchase the
KPA100 around Christmas. No assembly problems, everything checked
out the first time. Du
In a message dated 10/1/06 6:58:53 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
> Ignition noise from large trucks??? All of the ones I've seen are diesel -
> no spark ignition at all!
>
Many of not most auto and truck diesel engines made in recent years use
electronic injection contr
Ron, AC7AC wrote:
But we then need a decent
tuner to feed the antenna & open-wire. Here I drop back to the old
tank-circuit tuners which make things "sing!" I don't like to use a
balun here - it's just another device to burn up the precious RF when
you hit a severe mis-match node.".
Even among
John Buck wrote:
The voltage on my meter is 13.65 with no load.
With K2/100 set for 50 watts out the voltage drops to 13.3 with a
string of 15 wpm dashes.
At 75 watts it drops to 12.75 volts.
At 100 watts it drops to 12.2 volts.
Due to the large capacitance, it takes several seconds to drop to
For my K2, I went with the Astron RS-20M supply. It is a linear supply,
not a switching supply. I went that way because I knew it would work,
would generate no noise and would be something I could service down the
road. I got the 20 amp supply even though my K2 is only 10 watts
output. Someday,
About link-coupled tuners, I'd like to point to Emtech's ZM-2 ATU:
http://emtech.steadynet.com/zm2.shtml
Still not managed to give the front plate color same as K2.
It is stuck over the K2 with 2 pieces of double sided (reworkable)tape.
I no longer use the K2 internal ATU. Nor a balun. QRP power is
Followup: After receiving a wonderful and long list of suggestions from
Gary, I understood that the U10a oscillation on receive is not a
pathological matter and that I shouldn't worry about it.
And, embarrassingly, in pursuit of the low-TX-power problem I discovered
an unsoldered joint on a re
I have been following the 135 ft flattop thread with interest. I was running my
K1 into a 40m wire vertical via 100 ft of RG8x. After doing some loss
calculations, that seemed pretty silly, so I set out for a more efficient.
arrangement. I just put up a 40m folded dipole (same diameter wires) fe
Hi Stephanie,
Don't know about that, but it is pretty easy to assign the sidetone volume
to function key 1. That way I can still fine tune the volume easily. I
think this is more flexible than tying the sidetone volume to the volume
control.
Steve, W2MY
-Original Message-
From: [EMAIL PR
Hello all,
On Friday, October 6th from 1900utc until 2200utc or so look for Polar
Bears on the air! Yes we bears will hike, drive etc to the top of the
local terrain and operate our qrp rigs. We call this a Polar Bear
Moonlight Madness Event or PBMME. We do this only during or near a full
moon eve
Is that low current drain voltage of 13.65 adequate for maintaining the K2
internal battery???
72 Fred - kt5x
K2 # 700
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Yep, that's why I also wrote in the message you quoted from:
"Such trucks often make a lot of hash from various electric motors, etc. -
just the sort of thing the NB can't touch. "
My NB works FB, but is by far does the most spectacular job on
high-amplitude short-duration pulses like ignition n
Geoff, GM4ESD, makes some excellent observations about using other types of
multi-wire line to maintain low resistive losses and to provide a
lower-impedance line when needed.
Jack Bindle took me to task, quite appropriately, about one statement in my
first comments in this thread in a private mes
[EMAIL PROTECTED] wrote:
I have been following the 135 ft flattop thread with interest. I was running my
K1 into a 40m wire vertical via 100 ft of RG8x. After doing some loss
calculations, that seemed pretty silly,
A 100 feet of RG8X is a looser for QRP.
so I set out for a more efficient.
I purchased a new ASTRON RS-35M, 35 amp 13.8VDC
linear supply - for my ham, and K2 supply needs.
It is more than enough amps, to supply all the
current I may need from several pieces of ham
gear. Astron supplies are built like tanks,
and they hold their values over many years.
I think the RS-35M w
For the QRP K2, another good power option is an AGM lead-acid battery in
7 to 40 amp range, a multi-level charger (Battery Tender or Battery
Tender Jr for the smaller batteries, Motorcycle Accesories Warehouse),
and a 5-10W solar panel (EBay, Northern Tool) with Don Brown's
controller for backu
You could measure power accuratly using the scope and a dummy load.
Measuring power at the load with a 300 ohm dummy load and balun and then, in
a seperate test, measuring it with a 75 ohm load and no balun would give you
a rough idea of balun losses. This would show balun losses if they were
Sorry, I just can not understand why that should be so. I have managed to
heat very large toroid baluns to the point where wire insulation melted just
by driving a 100 watts or so into an extreme SWR. Perhaps you are assumming
a simple 1:1 choke balun? A 4:1 voltage balun can easily have ext
Hi gang,
I'm looking for an online source for those automobile fuses which are used
in the RigRunner power distributors. While I'm at it I'd like to order some
"zip-cord" wire in various gauges and colors. Does anyone have a good
online source for these?
Thanks for your help,
Tom
WB2QDG
-
Hi Tom,
Try www.powerwerx.com or www.westmountainradio.com.
They both have the fuses and the wire.
Ken
KB8KE
K2#5534
--- Tom McCulloch <[EMAIL PROTECTED]> wrote:
> Hi gang,
>
> I'm looking for an online source for those
> automobile fuses which are used
> in the RigRunner power distributor
On 10/2/06, Samir Popaja <[EMAIL PROTECTED]> wrote:
Which to choose, switching supply or not switching?
I would say choose based on how you plan to use it. In a roomy radio
work area a linear is nice and simple. It can also heat the room which
is nice in Canadian winters. If you have a tiny are
My test data indicates that my K2 / 100 is happy with the Gamma power
supply.
The K2/100 is specified to run ok down to 11 volts. The K2 is more
tolerant than many rigs when run at supply voltages down to 12 volts
minus line drop.
As I stated, the Gamma does run 100 watt cw with the K2/100. T
Hello,
On Friday, October 6th from 19:00 UTC until 23:59 UTC or so look for Polar
Bears on the air! The PB's will hike, drive etc to the top of the local
terrain and operate their QRP rigs. We call this a Polar Bear Moonlight
Madness Event (PBMME) or the Polar Bear Run. We do this only during
Tom:
I don't know about the fuses, but www.dcpwr.com has a good selection of
zip-cord wire. They also sell powerpole parts. No affiliation, but I
have placed an order with them and was very happy with their response.
Obviously, you can get the fuses locally from any number of automotive
sup
Check your local car audio shop .. they'll have both, and you get
instant gratification :)
de w1rt/john
On 10/2/06, Tom McCulloch <[EMAIL PROTECTED]> wrote:
Hi gang,
I'm looking for an online source for those automobile fuses which are used
in the RigRunner power distributors. While I'm at i
Be careful of "automotive" fuse holders. I had one rated for 20 amps
actually soften, deform and finally produce an intermittent connection at
less than 15 amps average!
Like anything else, the quality varies widely depending upon price and
supplier.
Ron AC7AC
_
Hi All:
I am not sure I understand the procedure for terminating the sampling ports.
If a port is unused it says to terminate it into the internal 50 ohm load to
maintain balance. This makes sense. But if I connect a port (or ports)
through a short piece of 50 ohm coax to a scope which has a hi
Mark,
I use my homebrew PAC-12 with my K1. It works very well and I am happy
with it. I've used it for various QRP-ARCI Sprints; as well as Field
Day 2005. Of course, it's not a full sized dipole up 50 feet in the
air; and it's not a Yagi on a 50 foot tower. That all being said, it
does a
With a high impedance input to the scope, yes. Some scopes offer a 50-ohm
termination at the scope as well. If you use that, you must not use the 50
ohm termination at the CP1. Be careful though. Many built-in terminations in
equipment like an oscilloscope has a very limited power handling capabili
In a message dated 10/2/06 10:45:35 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
> Yep, that's why I also wrote in the message you quoted from:
>
> "Such trucks often make a lot of hash from various electric motors, etc. -
> just the sort of thing the NB can't touch. "
Agreed!
My only
Jim wrote:
My only real point was that the electronic injectors can make noise similar
to an ignition system.
OTOH, a diesel like this one:
http://people.bath.ac.uk/ccsshb/12cyl/
--
I didn't realize that. Thanks!
Wow! That's an ENGINE! It reminds me of the time
If the scope is Hi-Z, DO NOT terminate the coupler internally. Instead,
use a BNC Tee and terminate at the scope input with a 50 ohm
termination. Otherwise, the feedline to the scope will provide a
reactive load to the coupler port.
Larry N8LP
Paul T. Rubin wrote:
Hi All:
I am not sure
Paul,
If you use a 50 ohm coax between the CP1 and the 'scope, you should use a 50
ohm termination right at the 'scope to achieve proper patterns and voltage
readings on the 'scope - the in-line type terminators work best in this
situation, and you would not use the CP1 built-in termination for th
Man
The extremes these guys go through to deliver that
package!
(heh heh)
Ron wb1hga
Ron D'Eau Claire wrote:
> It was lunch hour and, looking for the guys to
give the package to, I found
them having lunch deep in the huge building. They were sitting about six
feet or so up on a huge round
KArl - You wrote
" A 100 feet of RG8X is a looser for QRP."
Well, WD4LST was using 100 ft at 40 M, which amounts to 0.6 to 0.8 dB
of loss depending on the feedline pedigree. RG-213 is about 0.5 to 0.6
dB at the same length and frequency, so the RG-8X looks pretty good,
particularly when you
For any of you folks out there needing Wisconsin for your WAS, QRP CW or
otherwise, this week the NAQCC Bear is Terry WU9F.
Terry's schedule is posted at http://www.arm-tek.net/~yoel/wasproject.html
Give him a call; I'm sure he like to hand out Wisconsin to anyone who
might need it (or even if
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