Hi Fellow Elecrafters,
First off I would like to thank all who responded to my questions concerning
soldering the lugs/tabs of slug tuned coils. And, about how long it might take
Elecraft to send a replacement for a missing part. As for the missing part and
replacement, it was ten days for
Greetings from down-under,
I believe it may make me feel a little
better if I share this embarrassment with the group.
My T1 kit which was shipped on March 21 arrived a few days ago and yielded the
usual perfect inventory, but of course the shipment
Hello Marinos,
There have been several schematics using such technics over the last 20
years. Most of them use a seperate short antenna, feeding the signal pase
shifted into a combiner which combines the main Antenna Signal with the
phases shifted extra antenna signal. This construction can
Thks for the replies,
A/C hum was from my laptop puter, I split feed the out put to mixw to check
on signals and zero beat. Moving it away from K1 did the trick.
Bob KC8IPQ
- Original Message -
From: ROBERT PHILLIPS [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Thursday,
http://www.mfjenterprises.com/products.php?prodid=MFJ-1025
http://www.w8ji.com/mfj-1025_1026.htm
73, Bill W4ZV
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I don't know enough to be sure, but here's my stab in case noone else chimes
in.
r82/r83 appear to be a voltage divider for q22.
If r82 becomes 22ohm, then r83 ought to go up 122% also.
Another thought, since there's lots of room on that part of the board.
Use 2 of each (15, 22),
Rick,
You must have a circuit problem, either there is a bad component, or a
component in the wrong place, a bad solder joint or something in the oscillator
is drawing too much current.
Check U2 for 1.22 volts. Make sure R9 is correct value. Check voltage at the
junction of R10 and R11 should
Hi Peter,
Would this type of noise canceler not work on white noise also ?
73,
Marinos, ki4gin
From: Peter Zenker [EMAIL PROTECTED]
To: 'Marinos Markomanolakis, M.D.'
[EMAIL PROTECTED],elecraft@mailman.qth.net
Subject: RE: [Elecraft] RF Noise canceller ?
Date: Sun, 3 Apr 2005 13:03:51 +0200
Hello Jim,
The two solutions I've looked at so far are unappealing (going all the way
to the 100W level, or the hfpack-based project which includes a DC/DC
converter to run it's transistors at 28V, which has it's own efficiency
impact.)
I have been looking for a more modest power increase,
Having K2, also I would like to see K1 with 80-40-20
(and build it ASAP).
Many of my friends tell taking K1 everywhere with them in
spite of having K2 aswell.
Instead of power I would like to concentrate to simple but
efficient antennas. Changing from vertical to horizontal gives up to 6dB.
In a message dated 03/04/05 12:11:33 GMT Daylight Time, [EMAIL PROTECTED]
writes:
There have been several schematics using such technics over the last 20
years. Most of them use a seperate short antenna, feeding the signal pase
shifted into a combiner which combines the main Antenna
I think no.
White noise by definition is no statistic, therefore IMO it cannot be
eliminated because at no time it has a defined phase angle.
73 de Peter
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Marinos Markomanolakis, M.D.
Sent:
I also had a short e-mail exchange with Wayne that ended in
my suggesting a new 3-band module covering 80 and two other
bands (perhaps 40/30 or 40/20); I think something like this
would be really valuable as we are now at a lower point of
the solar cycle than when the K1 was first
Thanks to all. The K1 will happily be passed to one of ours in service
overseas!!
Pete WK8S
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I understood that there was some inter-band dependency, but I had not
considered that the 4 band module could be made to 3 bands this way. That
would be good news; the 80-40-30 combination is likely the most frequently
used configuration I would need. I looked at the 4-band module and many of
David
You only need the 11,5 MHz Xtal Elecraft is using in the standard 2 band
version plus some caps.
Section 1 is equipped with all parts for 80m, LPF datas can be overtaken
from the K1 80m Module
Section 2 is built identical to former section 1 as 40/30m Module.
Peter
-Original
-Original Message-
Would this type of noise canceler not work on white noise also ?
___
The simplest answer is no. White noise typically arrives from random
directions, with random phases, random polarizations, etc. etc. etc. and
are usually from thermal
It's likely been thouugh of by many, but discussed by few.
dt
.
--- david feldman [EMAIL PROTECTED] wrote:
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
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Help:
Would this type of noise canceler not work on white noise also ? 73,
Marinos, ki4gin
That depends a lot on the source of the noise, broadband (white) or
otherwise. These circuits depend upon a second antenna picking up the noise
better than the signal. Then the signal from the noise antenna
I have never purchased extended warrantees on electronics, but I may start.
Lead is being outlawed in electronics in Europe, and most of the rest of the
world is going the same way. I work in automotive electronics, and have been
aware this was coming for years, but our customers are now starting
I finished K2 #4690 about a month ago..works great and meets all specs.
2 weeks ago I finshed the KAT100 which will live in an EC2 along with
a KPA100. I installed a KIO2 in the K2 and hooked up the KAT100 and my
laptop... All is well and worked perfectly.. all voltages were
correct. I
You can run the HFPacker amp at 12v instead of 24v and get less current
draw and less power out. Plus it would be smaller. Also you don't need
to build the output filter on the K5OOR board since your K1 doesn't
cover 160-10...you could build a switchable filter for just the 2 or 4
bands you
Allen,
I believe that you are correct and figured that my XG1 had too much current
draw. I will do that as soon as I have the chance. Right now am just a bit
busy getting a couple of computers built up to replace some boxes that
recently went belly up. In a couple of weeks I'll be recuperating
-Original Message-
Would this type of noise canceler not work on white noise also ?
__
White noise typically arrives from random directions, with random phases,
random polarizations, etc. etc. etc. and are usually from thermal and
uncorrelated sources.
---
Sorry Folks,
In an effort to do a million things at once I forgot when the time
change occurs. Not Sunday but Saturday night! Thus this errata message.
The Elecraft CW Net will be held:
Sunday 2300z (Sunday 4pm PDT) 14050 kHz
Monday 0200z (Sunday 7pm PDT) 7045 kHz
I try to keep my skeds
Hi folks,
a friend of mine just reported to me his K2 (which I built for him) audio
output level would vary about 20 dB over the full AGC range.
He used a test transmitter and an AF voltmeter for this test and varied
the RF output level over the full AGC range of his K2.
I never measured the
Anyone have a top cover for a K2 with perhaps the tuner and battery option
for sale? If so please let me know what you have and how much you want for
it shipped to Zip 45324.
Thanks
Tim
NZ8J
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Basic K2 SN 4853 made its maiden appearance on the bands today running 15.2
watts!
73,
Charlie, W0YG..
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Interesting thought Marinos. There are receivers (non amateur) in which any
DSP,s ( if there is one) main job is to provide a large number of audio
filter bandwidths and some additional hetrodyne removal. The removal of QRN
noise and QRM within the IF filters passband is done in the early stages
Hi Ron,
The masking material is the pieces of tape, usually green, around each
hole. I found a sharp case cutter edge was necessary to remove it. You
should have nice, shiny bare metal around the holes on the inside of each
panel. That will make sure you get good RF shielding. The rest of
We had a pleasant net this evening. I met some new folks and got
reacquainted with some of the others. Weak signals on 20 meters so I may
have missed one or two. Sorry about that. But on 40 meters it was much
better. There were certain parts of the continent which were much easier
to work
I guess I was in the one or two that were missed. I should have looked up
your call to see where you were. Had the beam towards 5-land and could
barely hear you. I called and you picked up a letter or two, I think. I
finally figured out you are in OR off the side of the beam. I got the beam
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