Actually Vic, I think a few folks might be interested
in this topic on the reflector (for a while). I, too,
have a number of steppers and would like to use them
for remote tweaking of a phased array.
I do know there are several controller kits available
and easily found. The question seems to be,
Although the T1's info menu is very simple, I have a way of forgetting
things, so I stuck a little cheat sheet to the underside of the battery
compartment lid in order to prevent any future confusion.
I cut a large address label to 2 x 7/8, then made a small vertical chart,
identifying each
The wobble itself is normal, but I have the skipping every now and then
too. Mine either loops (1-2-3-1-2-3) or skips (0-2-4-7-8), but not
often enough to make me want to replace the encoder yet. I think I
damaged the encoder in a backpack, as I had to replace the pots in the
past. I tried
Don,
If you can record and report the conditions (band, operational data before the
occurrance, etc.) you observe each time it happens, you may be helping others
and the real cause just might be found and corrected.
this is my problem. It seems there are no specific conditions to trigger
Just a reminder that the ECN/30 will be meeting Thursday at 8E/7C/6M/5P (0100
UTC Friday). I've moved to a later hour to accomodate for the later local
sunset (propagation). It will have the added advantage of allowing those who
live in the west to check in after they get home from work. We will
Humble Pie time,
I previously sought advice from the list regarding low power output from
my K2 in Tune mode, and I later found also in CW mode. This only
occurred when the SSB module was installed.
After much investigation of the SSB module, rechecking component
location etc.. I had a
I'm looking for designs for an RF amp for my K2. Can anyone point me to
a design? I plan to use it for CW only, 40 meters only, and roughly 75
watts output. Solid state preferred but not required. I'd like to keep
it external to my K2 so I can keep the K2 in its QRP flavor.
Thanks,
--Andrew,
http://www.communication-concepts.com/hf_amplifiers.htm
should be of some interest to you
--
On 30 Mar 2005 at 10:18, Andrew Moore wrote:
I'm looking for designs for an RF amp for my K2. Can anyone point me
to a design? I plan to use it for CW only, 40 meters only, and
roughly 75 watts
This is probably FAQ, but I'm curious if/how the K1 is set up for 6 bands
simultaneously (basically a K1-4 with an extra 2-band filter module.) I'd
really like to find a way not to have to open the rig to switch between band
sets, and would like to have access to 80 and 15/17 along with the
--- [EMAIL PROTECTED] wrote:
What does this mean for a frequency? - 10.1x2.7 or 10.1x7.2
Mike, NJ2OM
Hi Mike,
Excellent question - and hopefully my explanation will make sense for you and
others who are curious. The 'x' in 10.1x2.7 and 10.1x7.2 can stand for any
number that results in a legal
I was wondering of anyone has built the amp shown at the link below. It had my
interest for a while until it's power requirements were pointed out to me as
being a drawback, price-wise.
Tom
WB2QDG
K2 1103
-- Original message --
From: Mike W [EMAIL PROTECTED]
Look at the Class E designs .. cheap transistors, switching power
supplies, easy to build
de John/W1RT
On Wed, 30 Mar 2005 10:18:27 -0500, Andrew Moore [EMAIL PROTECTED] wrote:
I'm looking for designs for an RF amp for my K2. Can anyone point me to
a design? I plan to use it for CW only, 40
In a message dated 30/03/05 17:03:47 GMT Daylight Time, [EMAIL PROTECTED]
writes:
I was wondering of anyone has built the amp shown at the link below. It had
my interest for a while until it's power requirements were pointed out to me
as being a drawback, price-wise.
J F wrote:
Actually Vic, I think a few folks might be interested
in this topic on the reflector (for a while). I, too,
have a number of steppers and would like to use them
for remote tweaking of a phased array.
I do know there are several controller kits available
and easily found. The
Hi folks:
The excitement is building.
K2 s/n 3460 and I have made it as far as page 46.
Who would have thought that an instruction manual would be such a page
turner?
During Alignment and Test, Part 1 Info Code 080 pointed me to a
problem with the Z5 ceramic resonator: I forgot to put it in.
Hello all,
Due to battery limitations and bad band conditions, I will focus my
effort on cw. I will operate ssb, but mostly cw. Look for me on the
following frequencies:
CW: 7.040mhz and 14.060mhz (5w)
SSB: 7.270mhz and 14.270mhz (10w)
Remember that if you work WA3WSJ, you are eligible to
In a message dated 30/03/05 17:45:28 GMT Daylight Time,
[EMAIL PROTECTED] writes:
What do I do with the leads of Z5? Do I clip them, or leave them alone?
-
The usual rule is if the component wire ends stick out chop 'em
After you have you have soldered Z5 into the correct place on the PCB trim
the free wire ends as normal as with most other components.
Just to avoid any confusion!
Bob, G3VVT
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Post to: Elecraft@mailman.qth.net
You must
K.I.S.S.
Why not choose:
10,102.7
10,103.7
10,104.7
10,105.7
10,106.7
10,107.7
10,108.7
10,109.7.
Then, you tune in the net (at 10Hz) 10,102.70, and then set the rate to
1KHz. Each VFO step is another freq. Very little dial twiddling needed to
QSY up one, two, three or so channels.
Once you've
The confusion would come from the warning not to trim the leads of the
relays. Trim ALL other leads.
Dan / WG4S / K2 #2456
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
Sent: Wednesday, March 30, 2005 12:13 PM
To: [EMAIL PROTECTED];
There are (at least) three types of people on this list:
- those who take pride in what they build
- those who take pride in what they operate
- those who take pride in both
Count me in the third category. I thoroughly enjoyed the building process, and
have no fear of having to dig into my K2 if
Vic,
there was an article in QST a few years back on an
automatic antenna tuner that used steppers. The
feedback control used a basic stamp as I recall. It
was adaptable, if you want to write/modify code.
You may want to think about the rotary inductor. A
school of thought has it that they are
How would one calculate the amplifier gain (in dB) required to go from one
power level to another? For example from 5W to 100W.
K3UJ
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You must be a subscriber to post to the list.
dB = 10 log (P2/P1)
For your example of 5 watts to 100 watts, is an increase of 13.01029996 dB -
pardon the rounding but that is all the digits my calculator shows :).
73,
Don W3FPR
-Original Message-
How would one calculate the amplifier gain (in dB) required to go
from one
power
On Mar 30, 2005, at 12:23 PM, Dan Barker wrote:
The confusion would come from the warning not to trim the leads of the
relays. Trim ALL other leads.
Even ICs??
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You must be a subscriber to
Dan Barker wrote:
The confusion would come from the warning not to trim the leads of the
relays. Trim ALL other leads.
I have assembled control, front panel and first stage of rf board.
I didn't trim the IC's leads or resistor pack's leads. I don't know why :-)
What comes to testing, I have
dBm's
Just remember this (no maths:))) :
Every 3dB increase is power multiplied by 2 times (1W to 2W is 30dBm to
33dBm)
So 1W+3dB (1x2=2) is 2W+3dB (2x2=4)4W+3dB(4x2=8)8W and so on.
Every 10dB increase is power multiplied by 10 (1W to 10W is 30dBm to 40dBm
100W to 1KW is 50 dBm to 60 dBm the easy
EricJ wrote:
I'm sorry, but the idea of bonding with inanimate objects is beyond my
understanding.
I disagree. My K2 is no. 709, and has been around for a few years. Since I
built it, I have taken it apart what seems to me a thousand times (probably it
wasn't really quite so many).
On Mar 30, 2005, at 1:34 PM, Rolf Moberg, OH6KXL wrote:
My own (SN 4759) measurements with external DMM were as follows:
- U2 pint 5 max 3.79 V
- U4 OUT 7.9 V
I understand there is no big difference between 3.80V and 3.79V.
However, when manual asks (page 47) to adjust R1 for a reading of
In a message dated 3/30/2005 10:02:44 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
How would one calculate the amplifier gain (in dB) required to go from one
power level to another? For example from 5W to 100W.
The formula is: dB = 10 log (P2 / P1)
P2 / P1 = 100 / 5 = 20
Im with Adi on this one..i.e NO MATH!. Although I'm 100% certain Don is
correct, my fingers came with *about* a 12.6 dB increase. (I never did
understand those loggers)
Tom
WB2QDG
K2 1103
-- Original message --
From: S55M [EMAIL PROTECTED]
dBm's
Just
Paul Bruneau wrote:
When a manual tells me to adjust to a voltage, I like to be somewhere in
the middle with my pot...otherwise it makes me wonder what I did wrong.
I am still wondering :)
Indeed.
In fact after remeasuring U2 pin 5 voltage I got 3.78 volts. I am not
sure whether 3.79 volts
Hello dear elicrafter's,
I will stay from april 10th to april 23th on Belle Ile island for some
holidays with all the family for holidays.
This island is located near the south west coast of Britany. The island is
characterized by a very mild climate (the Gulf Stream is flowing nerby),
sandy
Hello all.
I have been setting up my transmit audio on K2 #4785 lsb/usb,ok here is
what ive noticed my usb reports on the conventional usb bands 20/15/10 are
great
no problems also reports on lsb conventional bands 80/40 are also great.
When I listen to usb on 80/40 it seems muffled and
K.I.S.S.
10db = 10 times
3db = 2 times
Add Products. Guess anything else. No calculators.
The original question, 5:100:
5:10 = 2x = 3db
10:100 = 10x = 10db
Sum: 13db.
Example:
25w up to 600.
3db is 50w
13db is 500w
600 is a little bit more. Call it 14db.
Example: 12W to 80W
24 is
At 12:01 PM 3/30/05, you wrote:
How would one calculate the amplifier gain (in dB) required to go from one
power level to another? For example from 5W to 100W.
10 log(P2/P1) = 10 log(100/5) = 10 log(20) = 10 (1.30103) = 13.0103dB
An easy 'rule of thumb' way to get a good idea of such levels
Remember that your filters are also used on transmit (OPT1). So go back and
redo your filter aligment per the book and preferably using Spectrograph.
This is most likely where your problem lies.
Gregg R. Lengling, W9DHI, Un-Retired
K2/100 SN 3075
http://www.milwaukeehdtv.org
- Original
Never trim precut to length leads such as ICs and relays, and resistor
packs, or crystals.
These have just enough extension thru the normal fillet of solder to not be
a problem, and to provide a place to clip on for troubleshooting probes.
Trimming short leads that were not designed to be
I'd hoped that the responses would be far more interesting than merely
looking up the answer, and I was NOT disappointed. Thanks, all!
Bill K3UJ
-Original Message-
How would one calculate the amplifier gain (in dB) required
There are those who advocate no fillet when soldering plated thru holes. Is
an obvious fillet in that instance a sign of too much solder?
K3UJ
===
Never trim precut to length leads such as ICs and relays, and resistor
packs, or crystals.
These have
I ran into a brain-teaser once, that had me baffled for hours (I won't say
how many). Finally, I called my sister, the Rocket Scientist (actually,
we're not _Rocket_ scientists - That's a quote from her husband) and asked
her.
She and Paul spent a few minutes on the problem, figured it out, but
If the transmit audio is fine, then maybe he doesn't want to mess with the
BFO settings for position FL1.
Only the BFO settings for FL1 position are used for transmit, regardless of
what filter position (FL1, 2, 3 or 4) is being used in receive.
Have you tried other FL positions? You can
Absolutely do not leave out the fillet. If you have a lead that sticks out
of a hole, you should have a fillet around it. That is a requirement of the
NASA soldering course of years ago, but has not changed as far as I see in
modern assemblies.
The flush plated thru hole is OK for solder bond
Thanks for the comments Ron.
Ok ive just revisited my posting i didn't make it clear that I am monitoring
my own recorded tx audio via recording with opt1 on rx/tx .
M1MGD G-QRP 11355
Elecraft K1 #1532
K2 #4785..72/73..
___
There are those who advocate no fillet when soldering plated thru holes.
Is
an obvious fillet in that instance a sign of too much solder?
K3UJ
===
With Elecraft's plated-through holes, it's at least a sign of more than
enough solder. When soldering
Yes math is beautifull (callculating needed space for 3d antennas HI.
But google can spare some time and paper.
:)
http://home.att.net/~numericana/answer/algebra.htm#quartic
- Original Message -
From: Dan Barker [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; Elecraft elecraft@mailman.qth.net
I always like to ask... Is this a trick question?
The way the problem is worded (and if I understand your geometry correctly)
implies an infinite number of solutions as long as the 20 foot ladder can
span the alley. Therefore, the width is anything less than or equal to 20
feet.
Al.
-
Hi folks,
It looks like the K2 and I will get a free trip to Rome (the one in Italy)
sometime soon courtesy of the employer.
I have never operated in Europe before and would like some insights and tips
you might have.
I will have power (220 and 120 VAC) and some room for a small antenna on a
Hmmm ... never seen square root as O with dot-dot on top.
Jamie
WB4YDL
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of S55M
Sent: Wednesday, March 30, 2005 2:47 PM
To: Elecraft
Subject: Re: [Elecraft] OT: math question
Yes math is beautifull
Stuart,
I've checked the ARRL and there is a bunch of info.
I guess that I'm really asking for local knowledge or personal experience.
Thanks es 73,
Lonnie
NY2LJ
From: Stuart Rohre [EMAIL PROTECTED]
Date: Wed Mar 30 15:02:34 CST 2005
To: [EMAIL PROTECTED] [EMAIL PROTECTED]
Subject: Re:
James C. Hall, MD wrote:
Hmmm ... never seen square root as O with dot-dot on top.
Right, they should have printed it as dah-dah-dah-dit ;-P
Sorry, couldn't resist this one 8-)
B73,
Andrea.
--
Homepage: http://andrea.borgia.bo.it /Amateur radio: IZ4FHT
I like simple, 10Db gain will go from 5 to 50Watts; 3Db more will double 50
to 100 Watts. Approximately 13 Db
--
73
Chuck AA8VS
www.aa8vs.org/aa8vs
FP #113 MI-QRP #1212 SOC #445
Firebird #2117 TSARC #3952
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
[EMAIL PROTECTED] wrote:
I'd appreciate technical tips, but I'm also desperate for operating
advice.
For starters, here is a PDF document with the bandplan:
http://www.arimi.it/bandplan/BP5_0LHVU.pdf
(Please note this is _not_ an official document, rather a compilation of
regulations,
I always feel more comfortable with a fillet.
Without a fillet it's much more difficult to inspect the lead to be sure you
have solder completely surrounding the lead. It's possible to have the hole
partially filled with solder so it looks ok from one angle but the lead is
not securely
I'll go with an alley of zero width.
best wishes,
dave belsley, w1euy
On Mar 30, 2005, at 3:22 PM, Dan Barker wrote:
I ran into a brain-teaser once, that had me baffled for hours (I won't
say
how many). Finally, I called my sister, the Rocket Scientist
(actually,
we're not _Rocket_
Thanks for the comments Ron.
Ok ive just revisited my posting i didn't make it clear that I am
monitoring
my own recorded tx audio via recording with opt1 on rx/tx .
M1MGD G-QRP 11355
Elecraft K1 #1532
K2 #4785..72/73..
--
Let's
That can't be right. Drawing it (roughly) on paper shows it to be around 13
feet wide, give or take a foot or so. But coming up with a precise equation
takes more math skills than high school left me with...
Bill K3UJ
In a message dated
Hi Frank:
Thanks pal... guess I got a bit ahead of myself there!
Of course, you're completely correct! Should have been 26db, instead of 16dB!
73,
Tom
At 03:54 PM 3/30/05, you wrote:
Hi Tom,
Just a small correction to your 2W to 800W example:
From 2W to 4W (first doubling of power) = +3dB
For convenience, Mini-Circuits has a nice printable conversion table at
http://www.mini-circuits.com/dg03-110.pdf
Larry N8LP
Tom Hammond wrote:
At 12:01 PM 3/30/05, you wrote:
How would one calculate the amplifier gain (in dB) required to go
from one
power level to another? For
On Wed, 30 Mar 2005, S55M wrote:
Yes math is beautifull (callculating needed space for 3d antennas HI.
But google can spare some time and paper.
:)
http://home.att.net/~numericana/answer/algebra.htm#quartic
ANd now I know why my daughters always hated math, and why I never passed the
test to
Well, Bill, my first answer of zero feet width is, in fact, a correct
answer, albeit rather degenerate. It was an answer that came
immediately to mind. However, there is a nondegenerate answer, which
is
approximately 12.3119 feet.
best wishes,
dave belsley, w1euy
That can't be right.
Is anyone using a K2 with 5B4AHR's (G3PMR) Shacklog logging program,
please?
73 de Chris, W4/G4BUE
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 266.8.4 - Release Date: 27/03/2005
___
Hi
My (approx 5 year old) countries list from ARRL lists 4U_ITU (the ITU)
and 4U_UN (the UN) as separate countries. It doesn't list 4Uanything
else as a separate prefix.
I worked 4U1WB (the World Bank) this weekend in the WPX test. Is 4U1WB
another country for DXCC purposes?
73,
Lenny
Hello all,
Due to a forecast calling for rain and wind late afternoon on Thursday,
we will leave PA around 7:30am and should be on the air by 10am or so at
Turkey Point Lighthouse ARLHS USA-857. Also look for us on the air
Thursday evening on 3.970mhz and 3.530 mhz at Concord Point Lighthouse
in
On Wed, Mar 30, 2005 at 08:11:05PM -0500, w2bvh wrote:
Hi
My (approx 5 year old) countries list from ARRL lists 4U_ITU (the ITU)
and 4U_UN (the UN) as separate countries. It doesn't list 4Uanything
else as a separate prefix.
I worked 4U1WB (the World Bank) this weekend in the WPX test.
I have a Hakko soldering reel holder. It has a ground screw for a ground wire.
I thought it was for grounding to your ground rod but the pic shows your
supposed to clip it to the circuit board your soldering on. does it matter?
WT5Y
___
Elecraft
I have made it to page 57, PLL Reference Oscillator Range Test.
My high Freq is 12098.42
low freq is 12085.21
Range = 13.21 kHz
So the range is not between 9.8 and 13 kHz, and I must refer to
Troubleshooting.
I'm stumped.
To exactly where in the Troubleshooting section are they referring?
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