Message: 21
Date: Tue, 01 Jun 2010 12:41:29 +
From: Lance Collister, W7GJ w...@q.com
Subject: Re: [Elecraft] [K3] RX-settings w/ preamp?
To: DM4iM hamra...@vr-web.de
Cc: elecraft elecraft@mailman.qth.net
Message-ID: blu0-smtp57b2093ca643484b79326b89...@phx.gbl
Content-Type: text/plain;
I bought a Heil HM-10-5 mic back in 2000 when I bought my
FT-847. This is the original style that sets in a cradle stand. I
chose the HC-5 element for good voice fidelity and always get good
reports. When I bought the K3/10 I contacted HRO for the correct
connector cable. Turns out that
I am using a top-loaded 43 foot vertical (43x130-foot inverted-L) on
495.6 KHz (600 meters). The antenna Z = 0.81 - j681.5 from EzNEC. I
built an air coil from #12 thhn copper wire (ordinary solid conductor
electrical housewire) roughly 10-in diam by 10-inch long 39 turns and
tapped it about
One of the reasons I chose the K3 was eventual 10-MHz ext. reference
capability.
Well, then I guess someone will have to come up with a 49.380 PLL
circuit that uses 10-MHz as a reference. I have two such critters
for mw use. One is distributed out of Israel and will be used in
place of my
This question is really a spin-off from the Power Control at 50-MHz.
I measured CW output with PWR set to max on the HF bands with my
Bird-43 power meter into a dummy load. I found that a setting of 12w
actually netted near 16w output 160-20m, but dropped to 8w on 10
6m. I didn't do a power
I encountered an interesting situation building a new control panel
box for my station that controls all the radio equipment: antenna
relays, preamps, transverters, amplifiers and switches between two
radios: FT-847 and the K3/10. I used opto-isolators to separate the
radio side from the
First off my K3/10 is what most consider QRP. I use a used MFJ-945E
tuner on 80-6m (also used when I ran my FT-847 on HF). Supposedly
rated to 300w (?) but I do not have anything that runs that high built.
But, mainly, I want to respond to the K3 types are devoted and
loyal, we're just a
Bill,
AS usual you have made an important observation. You made me curious
about my 6m environment so:
I turned off both my external preamp (RX ANT) and my internal preamp
(PRE) and merely looked at s-meter reading (S=1). I removed the
antenna with no discernable change in audible noise and
--
Message: 36
Date: Thu, 24 Jun 2010 11:38:45 +0100
From: Graham Kimbell \(G3TCT\) g3...@lineone.net
Subject: Re: [Elecraft] K3 PR6 preamp
To: Edward R Cole kl...@acsalaska.net, elecraft@mailman.qth.net
Message-ID: 004901cb1389$6e506180$0602a...@a
Content-Type: text/plain; charset=iso
2010 11:52:46 -0800, Edward R Cole wrote:
Running both preamps probably only raises the noise level and
does not improve receiver sensitivity in any significant
manner.
I suggest that you defer judgment on this until you're trying to
copy very weak signals during a band opening
I use the K3 clock set on utc as a convenience since my computer
displays local time. I used to have a MFJ dual-time clock for this
but it finally failed (it also required correction periodically).
My computer time is corrected every ten minutes with a NIST time
standard to 10ms accuracy.
I had the experience that my West Mountain assembled PP cable pulled
loose from the crimped connection when I tripped over it (yeah
extreme situation). I could not figure out how to extract the pin to
repair it. I bought three pre-made cables when I got a specially
made power cable for my
Labeling is a good idea, and probably not become a potential for an
error if your station is static (you assemble it and never make a
change). But someone like me that is always
building/modifying/rearranging the hookups, labels (alone) will not
prevent an accident. I run my 28v power to a
Absolutely!
Try to narrow down where the problem is (call Elecraft for help with
this if you are not able to do it on your own). Saves you and
Elecraft time in T/S. One of the most difficult things I had, as a
repair technician in my 45-years, was getting the customer to give me
good input
Bill, W5WVO gave a very detailed reply.
I would like to say the K3 requires no interface for digital modes.
Just run two audio patch cords (you can buy then at RS) from the
speaker and mic jacks on the computer soundcard to the LINE-IN and
LINE-OUT jacks on the KVX3 panel. All the audio
Comparing 6m to 17m is not very fair. My impression of 17m is its an
extension of 20m in nature and use.
Some regard 6m is our lowest VHF band; others as the highest HF
band. IMO it is neither. I find line-of-sight propagation quite
inferior to 2m and even 70cm. As a band with ionospheric
My first experience with DSP was using my FT-847. It is OK but not
spectacular. I mainly operate VHF+ and mostly eme so that is a
different thing than HF. The FT-847 is audio DSP so that limits it
right away. DSP filters are fixed in CW: 400-200-100-25 Hz. NR
worked OK on SSB. NB was not
Haven't you guys figured it out, yet? Rag chewing is done on e-mail
these days!
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-QRT*, 432-100w, 1296-QRT*, 3400-fall 2010
DUBUS Magazine USA Rep dubus...@hotmail.com
Ken,
I bought my K3 specifically for VHF+ weak signal operation. Mostly
that is eme. So I am going thru the station conversion process to
integrate the K3 into my eme system. I chose Downeast Microwave
transverters for getting on 144 and up. This is due to a long
history of using them
Don,
Thanks for the references. Many of us were not on this reflector or
even owned a K3 in 2009 so would not know. I am printing this off
for future reference when I am ready to investigate NR/NB more thoroughly.
73, Ed - KL7UW
---
Message: 8
Date:
I have kind of ignoring this thread, but just realized that it
addresses a long-term desire of mine. I would like to tap the IQ
data for both the main and sub receivers simultaneously for pc
processing with special eme sw. I can do one channel using the
SDR-IQ but there are advantages to
I'll take a stab at trying to explain how the s-meter works.
Now the K3 may do it differently since it may be done by the DSP, but
in normal analog radios, the IF is tapped at some point and goes to a
noise amplifier and detector. This produces a varying dc signal that
is used by the AGC
In some areas of ham radio having a fairly accurate measure of signal
strength is more than nice. On HF who really cares is what I am
getting here on the list. But if you design, construct and try to
get the optimum performance from your station, measurements become
more than nice. Of
Rich,
Usually, the s-meter samples the signal at the final IF so most of
the IF filtering will reject signals off-frequency. Since normally
this is done before the detector stage, audio bandwidth
characteristics (what the equalizers affect) are not involved. But I
must disclaim knowing
I would agree with Wayne.
My prime use of my K3/10 is not HF, but with transverters on VHF and
up, typically weak-signal CW. I ordered my K3/10 with the 2.8 and
400-Hz 8-pole filters as a good overall approach. I added 13-KHz for
VHF-FM and occasional BC/SW AM using the gen coverage option
Lu,
You have voiced well the decision process I went thru for arriving at
the K3 as my choice. My last Kenwood was the TS-180S (1981) and I
liked it quite well. It only had four memories (one of the first
synth rigs) but the receiver was very quiet on 80m. Alast, I
connected the B+
Tom,
IN addition to bonding my radio ground rod to the electrical ground
(on the other side of the house), I will have my radio ground going
to my cable entrance plate. From there I have two tables and my
racks arranged in an U configuration with radio table facing the
racks six feet across
: 8c568fc5ee5144a78e090bd4c6af9...@tom0c1d32a93f0
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original
I rarely disagree with Jim on audio issues, but I am going to disagree with
this:
On Tue, 20 Jul 2010 09:38:23 -0800, Edward R Cole wrote:
The only dc-isolated
Tom,
You must be talking about really old MOT radios as all the recent
stuff use N connectors on the repeaters/base stations and mini-UHF on
mobiles. The HT1250 our company bought had mini-phone to female BNC
adapters for connection of external antennas (HT1250 is a VHF
HT). You may be able
My comments preceded with ##
--
Message: 28
Date: Thu, 22 Jul 2010 15:04:40 -0700
From: Lyle Johnson k...@wavecable.com
Subject: [Elecraft] SDR with a Twist
To: wayne burdick n...@elecraft.com, 'Elecraft Group'
elecraft@mailman.qth.net
Message-ID:
Since most of you are talking about HF, I suppose they are fine.
Professionally, I had the most quality control issues with
PL-259's. I quickly decided that only Amphenol brand were to be
bought. They had much better plating for soldering. The problem
usually came from the extra heat
My current hearing aids are top of the Phonak line (22-channel DSP)
and are OTE (over the ear) style recommended by my audiologist. I
had Resound in the ear cannal style, before. With either I have no
problems with feedback whistles. Those are generally an indication
of a poor fit by the
Susan,
I was using a heavy-duty (#10) power cord with power-pole connectors
with my K3 and the weight of the wire would pull the connector
loose. One of the connectors was pulled off the wire (which was
crimped by the mfr and not soldered) so it is in my to be repaired
bin and I made a
I only have two power-pole connected radios (K3 and FT-817). I just
tested the resistance to separating the mated connectors and it sure
doesn't take much to disconnect them (certainly could not support the
weight of the radio). They are either commercially built cables or
ones that I
Yep, after I have the CCI 300w kit running I will build a 8877 for
HF/6m. I have the advantage ofhaving a spare 8877 and already
running a 8877on 2m so the control panel and HV PS will be
shared. So all I have to build is the RF compartment. Love those
triode gg amps.
If it were in the hands of the consumer and Americans had seen the
light? But unless you are the CEO or on the BOD of these
manufacturing companies, the decision was made for profits and the
consumer was not consulted. Its too late. Try to buy something at
the stores of America that are
Occam's Razor! Haven't heard that on this list before. Sounds like
an adherent of SETI?
Regarding the simplest solution is often true, reminds me of the
advice of an old mentor back 30-years ago advising me not to be
looking for complicated causes for electronic malfunctions, ... the
Plan for another GW Test tomorrow,Aug. 7 at 11am (1900z).
1900-1908 WSPR: 495.6/497.1
1908-1910 stby
1910-1920 CW 495.6
1920-1925 A0 495.6
If I get time I will try to T/S my RF level problem, but it it still
drops off, disregard as level usually jumps back to the same value
when I tweak the
Sorry I pulled the wrong list up from my address book - intended for
the 500-KHz Group (WD2XSH).
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-QRT*, 432-100w, 1296-QRT*, 3400-fall 2010
DUBUS Magazine USA Rep
Yep, a few of them are still with me like: CQ and SK and TEST and
RST and NAME...pretty good since the last time I operated CW for any
extended time was in 1958-1959 as a novice!
But you have hit on what my problem is -- No parallel processor!
;-) MY wife can rattle off at length when I am
Remote Internet control would be nice, but I'd rather it be a virtual
control panel on my computer screen. Then I could travel anywhere
and connect to my ham shack for remote operation. Maybe convert that
RJ45 test jack to a ethernet portal?
The size of the radio is just fine as-is. You
Bill,
I have a MH-31 mic with the RJ45 plug and wanted to use it with my
Yaesu FT-847 that requires a 8-pin jack. I bought a RJ45 jack in a
wall outlet plate, wired the 8-pin jack to the outlet and plug the
mic into the jack. I mounted the wall plate onto plastic outlet box
made for
Many years ago I ran Norton AV on one of my computers and had a devil
of a time uninstalling it when it became a problem. We now run
AVG9.0 on all four of our faster computers and nothing on the win95
p100 and p90 which are not connected to the Internet (one is shelved
and the other runs two
I was too late for the net but found Roger, K7SJ on 14.314 Sunday
morning and had a nice chat. After that John, N6JW/6 and I had an
even longer QSO. I am running my K3/10 with 14w to a triband yagi at
50-feet. Near QRP did quite nicely. Eventually, we will have
250-300w using a CCI kit
When I was considering wiring for my new station control panel, I
decided to harvest twisted pair from Cat-5e to use as hookup
wire. I was aware that it would reject low-freq noise and hum
without shielding. Having a large amount of Cat-5e didn't hurt,
either. I believe Cat-5e is isolated
Please excuse this comment as I receive the reflector as a digest.
My wife works as an agent for Dubus Magazine published in
Germany. The cost of paying exchange fees for every subscription
would be prohibitive for both the subscriber and publisher on an
individual case. Dubus solution is
Wayne,
I am concerned about any modifications that impact low-noise and MDS
performance, but can see advantages of Ethernet connection for future
applications. I would entertain an external Ethernet module that
would talk thru the existing K3 RS-232 interface if this is
practical. I am not
I thought I would change the thread (title) a little.
I have been using my K3 on 500-KHz (running in the TEST mode) for
several months. It is driving two buffer amps for 10mw to drive a
surplus NDB xmtr (non-directional beacon) as a 100w linear amp and
feeding a 43x130 foot inverted-L
I have not detected birdies in the K3, but have not used it a 28-MHz
so far. Until I have a VHF transverter I will not be able to examine
this very well, but I will be using 28-MHz as an IF for both 144 and 1296 MHz.
But is the stiffener standard on radios after spring-2010? My K3 is
#4043.
Being curious I checked my K3 (4043) which I run with an external
speaker (an old National 1950's era 10-inch speaker -probably 4 or
8-ohm). Comfortable audio with volume set at 9-oclock. Turning on
NB does not affect the level. NR lowers volume which requires
adjusting volume to 11-oclock
One of my prime considerations choosing the K3 was for the Ext.
Ref. For the interim, I decided on the high accuracy 1/2-ppm
TCXO-3. I am pretty happy with it as is, but will get the external
option when it becomes available since I have a master freq.
reference OCXO for the station and a
John,
As Wayne has stated, routing varies with individual radios, so what
works for one may not be optimum for others (definitely a trial and
error process). A though occured to me, though. Since cable layout
seems to make a difference for some, I wonder if double-shielded
cables would make
I am in the same boat as it were, having bought the K3/10. If I
were considering the KPA500 then I would be looking for 40-50w driver
for it. That is a 6-dB amp driven by 12w from the K3/10. That ought
to be simple to make. So will K3 roll out one? Or an entrepreneur
ham come up with one?
John is correct. Diversity receivers require a common LO. This is
provided in the K3 with the aux receiver, but adding VHF transverters
to both receivers will not add properly if they are running separate LO's.
I am in the process of setting up a 2m dual-polarity receiver using
two
I do not have a P3, so my comments are based on my experience using
the SDR-IQ on 144-MHz using a 144/28 converter to receive 2m-eme signals.
The sensitivity of the display is tied to the sampling rate (FFT/BLK
size on the control panel of the SDR-IQ). With maximum sampling of
262,144 I get a
Good topic and timely for me.
I have the K3/10 with dual-Rx and no KAT-3. I use an inverted-L for
600m (495.6 KHz) and plan to make a rotatable shielded loop antenna
for alternate Rx. Best location is a corner of our back deck but
this is nearly underneath the horizontal wires of the
Like Don, I wear hearing aids (both ears) about 18-hours/day. I can
choose a flat response setting (called music or TV) and use it for
ham radio as it produces the crispest audio on voice. I found I
prefer using an external speaker over the internal K3 speaker. The
10-inch National Speaker
First: Thanks for posting your website url (saved in my favorites).
I wonder if any of you K3 owners have this phenomenon: My K3 causes
a loud pop-pop in the speaker when I turn on the power. It appears
that the volume is at full momentarily on turn on. I am using an
external 4-ohm speaker
Thanks for reminding us - too easy to think in 1950's analog reasoning.
I am glad for ability to turn-off AGC. Making sun-noise measurements
on VHF+ with an eme station, linear gain is needed for precise
measurements. AGC typically screws that up. For all other use I have AGC on.
73, Ed -
Ah yes. I remember one house my folks rented that had the wooden
crank phone on the wall. You just rang-up the operator for all
calls. Mostly, we had the plain black phone with no dial. Then one
with a dial (also black). Now you just tell your cell to call home.
My first rig was a three
Mark,
That was my situation for receiving UPS/FedEx when I was a bachelor
and at work. My solution was for delivery to made to my
workplace. I let others at work know I was expecting a personal
shipment to arrive so they would sign for it if I were out. Also, I
developed a good
Ron,
Either has a unique situation or extreme rainfall on the coast washes
off the salt air deposits. I lived on the California beach and my
car chrome and exposed metal did rust. Of course this was in 1970
before the automotive industry began using galvanized metal and rust
resistant
I bought the West Mountain COMspkr for my wife's computer to
eliminate RFI when I ran HF. They are advertised as RFI-proof and
worked for us. I have not tried it as a radio speaker.
If you can find an old ham receiver speaker from the 1950's they have
a wonderful sound that is hard to match
I run WSPR on 500-KHz as WD2XSH/45. I interfaced the computer audio
thru the K3 line-in and line-out jacks and control PTT with the
RS-232 connection. This requires you to run DATA-A. I set my
receive audio with the computer audio mixer window without any
changes to the K3. It runs at
Snap-crackle-pop - My 8877 amp is out of service until I solve
repeated HV arcs in the HV supply. At this point it blows everytime
I key PTT at which the G3SEK board disables with Anode alarm. So I
thank the 21 stations I worked last night - it was fun while it lasted.
I will now open the
Sorry picked wrong e-mail reflector out of my address book.
disregard.
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-800w, 432-100w, 1296-QRT*, 3400-winter?
DUBUS Magazine USA Rep dubus...@hotmail.com
I wasn't going to reply on the coax connector issue, but how I know
that Amphenol UHF connectors are best is from 15-years of commercial
use in Marine Electronics. They solder better and do not fail like
cheaper manufacturer's. We tried saving some money using RS
connectors in the beginning
Successfully downloaded MCU4.17 and began experimenting with APV. It
took awhile to find a weak CW signal - 20m band must be in good shape.
I did find one that was pretty spotty reception in 2.8-KHz bw; a bit
better with 400-Hz. Then is turned on the APV. I could see a
definite improvement
I'm a bit behind reading the digest because of 16-inches+ of snow
since Saturday (had to get a little exercise with the snow shovel).
Rick,
I am still running barefoot with my K3/10. I have checked into local
80m nets quite successfully, and the K3 Sunday 20m-SSB net a couple
times. So QRP
I had a boss at JPL that used a similar saying: If its good enough
to do right, its good enough to do imperfect, meaning to finish it
versus making it perfect but never getting there.
I have a Drake MN2000 tuner waiting for a 8877 to be
built. Actually, I will use it with the CCI 300w sspa.
My 144-MHz dual-polarity diversity receiver is exactly what you
describe, only for HF in your case: two orthogonal antennas, each
fed to one of the K3 receivers. In my case a dual-channel 144-MHz Rx
converter is feeding 28-MHz to the K3 and fed by my X-yagis. To
observe the polarity effects
For operating as WD2XSH/45 on 495.6 KHz, I connect thru the KVX3A Tx
and Rx terminals, and run in TEST mode so I bypass the HP filter to
get good sensitivity below 600-KHz. I added a Clifton-Labs BC Band
filter to suppress BC stations on the lower end from spattering down
into 500-KHz
I had the brochure of the K3 on my bulletin board for several years
as unabtainium. I studied the reviews, and considered the comments
of several owners of the K3, and it finally came down to raiding my
401K for the $3,199.97 that I spend for my K3/10+KRX3. That is more
than my first car
Birdies are mainly an issue for me on VHF+ where I am involved with
copying super-weak signals; bain of all eme stations. If 28-MHz is
impacted I will have to work on that as I am running the K3 with
transverters that output 28-32 MHz. Of course the output signal
level may be high enough not
I use the K3 Freq. Memory Editor sw to program up to 99 memories with
specific freq./modes for quick switching. This is loaded via the
RS232 port into the K3. Then all I do to change bands/modes is to
press MV and rotate VFO-A to select memories 00-99. I have them
grouped for favorite freq.
I had a scare last weekend when my SDR-IQ showed a huge level of
noise on the 500-KHz experimental band. The level was over 1000uV
and drove the SDR into clipping with potential damage to the front
end. This got me investigating with the K3 showing S9+60 full-tilt
noise on 500-KHz. I
Along this line of discussion, I wonder if those who have the KRX3
could use it as a noise cancelling receiver (similar to the
anc-4)? If the aux receiver output in diversity mode could be
reverse phased to cancel noise using a noise sniffer antenna. I
realise that would eliminate use of the
OK, I realize the Timewave and MFJ noise cancellers operate at RF and
not AF...But I was thinking of the amazing noise reduction that SDR's
accomplish in the digital relm. I understand it may not be that
simple. But sometimes asking the question gets new thinking going.
For example the
:
There is also the issue that the various AGC's may be varying the
amplitude, so the process would have to address both instant
amplitude and phase to affect cancellation. Should be able to
program that, though. How hard to code, who knows???
73, Guy.
On Sun, Nov 28, 2010 at 1:15 PM, Edward R. Cole
At 10:06 PM 11/29/2010, you wrote:
Noted your comment on noise reduction by phase nulling. Have you
looked on info on pages by pa0sim, see www.pa0sim.nl, he has done
more or less what I think you are considering. Ie connecting the
output from 2 phase locked receivers fed with separate antennas
powerfulÂ
version may be feasible. Â cheers, Johnny VR2XMC
- éµä»¶å件 å¯ä»¶äººï¹ Edward R.
Cole kl...@acsalaska.net æ¶ä»¶äººï¹
olaf.de...@mollefaret.no å¯æ¬(CC)
Elecraft@mailman.qth.net å³éæ¥æï¹
2010/11/30 (äº) 3:44:10 PM 主é¡ï¼ Re:
[Elecraft] Diversity Receive
Response to Bill W4ZV: Of course not everyone would chose to use
their sub-Rx for noise cancelling. I mentioned that in my initial
suggestion. I was only thinking of the diversity discussion that
David, AB7E, refers to and thinking there was another approach to
obtaining noise reduction or
Last spring I went hat in hand to my wife with the 3-year old K3
brochure. I did make an offer that she could not refuse (pay off the
loan on her Toyota Sienna). We plundered my 401K account for $12K; I
got $4K and she got $8K. Of course the interest on her car loan was
way more than what
I have the TCXO3-1 (49.380.000) but never bothered to calibrate
it. So out of curiosity, I measured my freq. on the K3 in the tune
mode on 20m and 6m:
Measured on a EIP-538 microwave counter, agrees 1-Hz accuracy with
my rubidium on 10-MHz:
14.205.000 read 14.204.994 (-6Hz)
50.110.000 read
There is another way to calibrate (though I have not tried it yet):
Transmit a carrier and measure the frequency on an accurate freq.
counter. My counter is good to 26-GHz with resolution to one
Hz. With it I found my K3 is off -6Hz on 20m and -16Hz on 6m. The
counter is referenced to a
I would like a K3 service manual (as a 30-year veteran
repair-tech). I bought the service manual for my old diesel scout
and my Toyota Tundra; for the FT-847 and several test equipment. It
gets expensive to ship it to the factory from Alaska.
I started out ham radio as a teenager, pretty
Good point. In fact, in my early work history as a tech writer for
Hughes Aircraft, we had a minimum of three people involved in editing
or reviewing text. I would write it, some one would review and
edit. I would review that and correct anything I thought was
needed. It went to a third
I have the 6m ARR P50VDG Gasfet preamp and KVX3. I wondered if the
P50VDG may have gain at 28-MHz? I entered 28.400 and alternated
between the P50VDG and the internal PRE. There were no signals to
check this on but with white noise the P50VDG shows slightly less
s-meter reading than the
I am licensed under the ARRL 600m Experimental Group which operates
495-510 KHz. The warc recommendations for 461-469, 471-478 KHz are
below the current min. freq. for the K3, 480-KHz. Will the K3
operate down there with a firmware change or will it take hardware
mods? If the allocation is
Lew,
I use a 43 foot high inverted-L on 500-KHz. The top hat is 130-foot
long. I have three parallel vertical wires and two horizontal wires
(tied together at base top and end). I get a working bandwidth of
about 495-502 KHz with this extremely short antenna (4.6% of a
quarter wavelength).
Observational note on radials on the ground. My 43x130 foot
inverted-L requires more inductance in the summer for resonance. I
see the change about a month after ground freeze-up (but that may
vary with moisture content of the ground). Fall usually exhibits
saturated ground due to the rainy
Samir,
Using the K3 as IF for connecting to XV-144 or other transverters
should work just fine. I am using my K3 on 28 MHz to operate on
1296-MHz with a 1296/28 transverter. I ordered the 25w transverter
set to drive with 1.0mw. It runs 5w with 0.25mw and full saturated
output of 20w+ with
I mounted my 6m preamp (it is not the PR6) on the back of my K3/10 on
the panel that normally has the fans for the KPA3. But I suspect
that would work if you have a PR6 and K3/10.
http://www.kl7uw.com/K3-ARR-6mPreamp.jpg
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ
I am glad that I started soundcard programs way back before
commercial interfaces were born. It is so simple to make. I bought
two 600-ohm pc board 1:1 audio transformers from RS and one 2n3904,
some resistors and caps. That was to set up my FT-847 on psk-31. I
then used the interface to
For my dual-polarity eme diversity receiver I need two LP-Pan
units. Does anyone have one or two to sell?
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw*, 432-100w*, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep
as exciter for
transmitting on 500-KHz.
Date: Fri, 21 Jan 2011 09:17:55 -0900
From: Edward R. Cole kl...@acsalaska.net
Subject: [Elecraft] WTB LP-Pan
To: Elecraft@mailman.qth.net
Message-ID: 201101211817.p0liht9m020...@denali.acsalaska.net
Content-Type
I just read the mail since I am not able to entertain getting a KPA500, etal.
But my experience running my K3/10 on 80m SSB is everyone hears me
FB. That is not 100w its 12w! So when the noise floor is S3 and I
am S8 (30-dB S/N) and the next guy is S9+10 it gets kinda crazy-funny
doncha
Having recently run 245 vac to my shack, I can say the HVPS runs
well. Key down at 1400w on my 2m-8877 and the line voltage drops 5v
(240 vs 245). I guess that is pretty good. I ran 40amp wiring
(35-feet of #8awg 4-cond) and split out two 120vac 20A ckts to run
some of the other ham
Ross, etal:
This had been discussed when I first got my K3/10 last spring. I
chose not to get the tuner since I was also not getting the 100w
option and have a 300w ext. tuner. Subsequently, I bought a 2kW
manual tuner for future use with amps (300w sspa and possibly a HB
8877 later on).
I
I installed the emu-0202 USB soundcard today and interconnected one
of the LP-Pan which was connected to the main-RX IF. I used
Spectravue as SDR sw since it was already installed for my SDR-IQ. I
didn't run into many hurdles and had 20m being displayed at 96-KHz
bw. It took a little
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