Hello Vic,
If you have not done this already, it would be wise to include in any model
all nearby metallic objects such as gutters, downpipes, etc, *before* you
cut any wire. Such objects can have a profound effect on the horizontal or
vertical pattern (or both) of an antenna, as I am sure
Hello Hans,
Sorry to hear about your problem.
When transmitting inot a 50 ohm dummy load, I would suggest that you first
measure the RF power actually reaching the dummy load in case the RF/ALC
indicator is misbehaving. If you do not have a RF Power Meter (Inline
type), then a diode
When I lived in Africa, Galena was used in the crystal sets which some of my
friends and I built during the very early 1940s. Galena could be found in
some outcrops of rock, many of which were present in our garden. Finding
the sweet spot for the cats whisker could be difficult.
Although at
The most useful tool, which I have found for this type of application, is
the simple screw Grabber. Not only can this tool be used to hold a screw
and washer(s) while starting the thread, but also while removing a screw and
washers. It can also be used to retrieve bits of wire, screws,
Howard,
My K2's receiver behaves in the same way as yours when scanning, much too
fast IMHO.
I am not aware of any setting which can be changed to make the K2's scanning
mode of greater use.
73,
Geoff
LX2AO
- Original Message -
From: hsawyermd hsawye...@gmail.com
To:
the
surgery.
Home now :-)
73,
Geoff
LX2AO
- Original Message -
From: Igor Sokolov ua9...@gmail.com
To: Geoffrey Mackenzie-Kennedy lx...@pt.lu
Cc: Elecraft Discussion List elecraft@mailman.qth.net
Sent: Saturday, April 06, 2013 9:16 PM
Subject: Re: [Elecraft] KX3 Amp
Geoff,
Thank
Hello Igor,
If you want to measure (with useful accuracy) the level of the IMD products
generated by your KX3 and HLA 300 Plus, all that you would need in addition
to your TS590 is a Two Tone (AF) Generator, an AF Spectrum Analyser and your
computer. If you Google Tcube you will find a
Don,
If the output of the 2 Tone generator which is built into the KX3 is
injected into the audio chain before any speech processing circuitry, yes
the internal 2 Tone generator could be used.
73,
Geoff.
LX2AO
On March 26, 2013 at 4:19 PM, Don Wilhelm wrote:
There is a 2 Tone generator
Rich,
Yes, you are right.
If you view the transmitter and receiver as a path along which the ESSB
transmitter's mike audio travels, then the transmitter's wide filter and
the receiver's narrow filter are in effect connected in series. Thus in
this case the combined response of the Tx and Rx
Ian,
Does the LO frequency jump if you tap the crystal's can using a plastic
rod such as an alignment tool or pencil? If it does, and if all of the
soldered connections in the LO's circuit are sound, the jump and drift are
most likely caused by some mechanical fault within the crystal
Cliff,
In Tx mode, is the 8T voltage at the junction of RFC13, C55 and Q20's gate
8 volts plus - minus a tad?
73,
Geoff
LX2AO
On January 03, 2013 at 8:17 PM, Clifford Hynds wrote:
Well I finished the K2 only to find no TX preliminary troubleshooting
seems
to suggest the T/R switch D6 and
Knut,
FWIW I found that the isolation between the ANT 1 and 2 ports of my KAT100
on 15m was only approx 40db. To increase the isolation between ports, not
only did I have to add a relay to ground the port not in use, but I also had
to replace the relay-to-port unshielded wiring with coax.
Has the schematic of the KX3 been published? Have searched, but cannot
find.
73,
Geoff
LX2AO
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Post:
Thank you Bruce.
73,
Geoff
LX2AO
Not yet. -Bruce, N1RX
Has the schematic of the KX3 been published? Have searched, but cannot
find.
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Help:
David,
My XYL and I have been away, so my apology for being slow to make a comment.
If your remote Beverages are to be used on 160m, 80m and 40m, and a remote
TRF is used on each band to provide selectivity and gain, then unless their
outputs are combined before up-conversion then obviously
A free software program which will generate one audio tone, or two separate
audio tones, is TCube. This program can be found by Googling Tcube.
The frequency range covered by each tone generator is 1 Hz to 10 kHz. Mouse
clicks allow fine tuning in steps of 1 Hz. The output level of each
Bill,
The clicks which your neighbour heard could have been caused by something in
your antenna or feeder arcing over, or possibly an intermittent
contact.I note that you said that sometimes your Cushcraft vertical has
high SWR spikes, which suggests that something in your feeder or antenna
Ed,
I received your direct e-mail which you sent to me on Dec.3, thanks.
According to a kind person who subscribes to the Elecraft List, it appears
that my IP address may be on a few Anti Spam engines, hence my mail to you
is being blocked.
73,
Geoff
LX2AO
On December 03, 2012 at 6:47 PM,
Ed,
Because in the past my e-mails direct to you have not been delivered, could
you please let me know if you receive the direct copy this e-mail.
Depending on your requirements for a good preamp (OIP2, OIP3, NF, Gain etc),
I might be able to offer some suggestions if this would be of any
Hello George,
You asked if there could be something wrong with a relay or relays.
Some years ago I had a similar problem with my K2/100, but it appeared only
on 40m. The cause was dirty relay contacts, rare in sealed relays, which
sometimes also caused the receiver's sensitivity to decrease
Chris,
Sorry to hear about the problem with your K3.
During any QSO after you found the problem, was your transmitted signal
affected at all, especially if you kept transmiting for two minutes or
longer? For example, any sign of a change in power output when using CW, or
your transmitted
Dave,
Do you have any information about the size and mix of the toroid core used
in the low pass filter added to the BNC antenna connector?
73,
Geoff
LX2AO
On November 13, 2012 at 5:16 PM, Dave Lankshear wrote:
snip
and there's also a low pass filter added to the BNC antenna
connector
Thanks Dave. Actually, knowing the size of the core does help!!
73,
Geoff
LX2AO
On November 13, 2012 at 10:35 PM, Dave Lankshear wrote:
I can only say it’s about ¼” diameter Geoffrey, Hi! Sorry I can’t help.
__
Elecraft
Hello Don,
Three questions:
Are both of your W2 and Antenna Analyzer powered from a PSU or a battery?
Do you have any form of common mode choke installed at the junction of the
coax and open wire feeders, or elsewhere along the coax?
Does the SWR reported by your W2 change at all (on any or
Hi Don,
Thanks for your reply. According to the EZNEC and TLW programs, on 20m you
should be seeing the following SWR values at the shack end of the coax. I
have also shown the total loss of the 450 ohm ladder line and the coax, but
not the insertion loss of the 1:1 balun. For this exercise
Hello Calvin,
Welcome to the Elecraft List.
Were you using a dummy load or your antenna when looking at your K2's output
with an Oscilloscope?
Is the frequency of the modulation/ ripple which you see equal to the
sidetone frequency, or a harmonic of the sidetone's frequency, which you are
David,
Have you tried your delta loop on 6m? Even though the 6m pattern might
resemble a hedgehog, depending upon where the delta's feeder is attached, it
should be useful.
73,
Geoff
LX2AO
On October 19, 2012 at 3:57 AM, David Poplewski wrote:
snip
At any rate I will be re-configuring
Jim,
Experience tells me that using a rigid coax connection between two stacked
units, such as a KPA500 and a KAT500, is not a good idea unless the stacked
units are bolted together or mounted in the same rack. If one of the units
should move even by a small amount, or try to move, a rigid
Georges,
Although the Hilberling PT-8000 series of transceivers are very expensive,
this could be because they have been designed for Military and 'commercial'
use and not only for amateurs. I believe that it should be possible to
design and market a high performance transceiver using an
Barry,
If the problem is not solved by Vic's suggestion to choke your feeder,
could you please let us know the length of the coax feeder (in feet or
metres) between your fan dipole's feedpoint and your K3. Also how long is
the part of the feeder which is indoors?
73,
Geoff
LX2AO
On
Happy Birthday Wayne!!
Fear not becoming 55, as many have said age is a state of mind! Keep up the
good work designing and enjoy life!! Just watch those ants who had their
eyes on your beer during field day :-)
73,
Geoff
LX2AO
Hi Wayne,
An important consideration IMHO when designing a remote AMU (ATU), is the
noise that it makes when tuning. Neighbours, for some strange reason, don't
like to be awakend by the sound of relays nor tuning motors when they are
sleeping :-)
73,
Geoff
LX2AO
On September 20, 2012 at
Rick,
Is your delta loop suspended with its apex up or down, or is it a horizontal
loop? If the apex is down or up it is better to use only one counterweight,
otherwise the antenna will walk if the trees sway in the wind. A
supporting catenary will also walk if a counterweight is used at
Rick,
Thank you for your reply, and my apology for taking so long to acknowledge
it.
I did at first try using bungee cords in GM land as Gary VE1RGB uses them,
and for the reasons which Gary mentioned, but unfortunately the squirrels
(mostly red) living on the farm there liked to chew bungee
Hello Matt,
Interesting that the other stations whose phase noise pestered you, did not
sense the presence of the K3's strong signal as the result of reciprocal
mixing in their receivers. Can you recall the model or models of
transceiver the others were using?
73,
Geoff
LX2AO
On September
Mike,
A point worth mentioning I believe, is that a static drain resistor placed
inside a transceiver/ transmitter/ receiver as you suggest will provide some
protection against static should an external static drain resistor fail into
an open condition. Certainly good practice IMHO.
73,
Hello Gil,
The ATU in your K1 could be making the difference. It will or should
transform the impedance presented by the 33.5 ft wire and 13 ft counterpoise
to 50 ohms resistive, which is the source impedance which the K1's receiver
likes to see. The K2's receiver would also like to see a 50
Hello Andrew,
Thanks for the clarification, you had me wondering :-)
73,
Geoff
LX2AO
On August 30, 2012 at 4:03 PM, Andrew Moore wrote:
Clarification - when I said the K1 ATU wouldn't make a difference, I mean
just as an installed option and wasn't considering it actually inline at
the
Hello Fred,
During the time when your reception is OFF, would be the best time to check
whether or not the LO is working, i.e. during the time when the fault
exists. It would also be the best time to check whether the LO's output is
reaching the mixers if the LO is working.
73,
Geoff
LX2AO
Hi Fred,
The problem as you have described it does suggest that either 1) The KX3's
LO (the synthesiser) is not working, or 2) The LO is working, but its output
is not getting to the receiver and transmitter mixers because of a broken
connection or a bad solder joint. I do not have any details
John,
My old (2000?) Toshiba Satellite 2450 has, in addition to the microphone
jack (monaural), a Line-in jack (stereo) as well as a 25 pin Parallel Port.
It weighs 3 kg.
I prefer the feel of its keyboard to that of my newer Toshiba Qosmio F20,
which does not have a Line-in jack.
Sorry that
Gary,
One answer to your first question is that the results of IMDDR3 tests at 2
kHz spacing, performed with a 500 Hz IF filter inline, do not themselves
tell you how a receiver will cope with two or more close spaced and strong
signals inside its 500 Hz passband. In the case of a superhet,
Geoff,
Have you tried pulling and then reseating the MCU on the Control Board? My
k2/100 #3255 froze on two occasions some years ago due to corrosion
between one or more of this IC's pins and its socket. I replaced this
socket with a Turned Pin type after the second episode, a type of socket
Don,
I agree with Don, W3FPR, that a connection central box or Breakout Box, is
a good plan. The box which I built uses toggle switches (each with an
ON-OFF LED indicator) rather than rotary switches, because frequently I want
to listen to two, sometimes but not often to three, of my
Dave,
To add to the replies which you have received, the width of your USB signal
should also include those intermodulation products which appear at
frequencies less than that of the suppressed carrier frequency, i.e. in the
LSB region. If you tuned your K3 to 14.225 MHz, these IMD products
Sorry Don, I was offline and I have just seen your comment, to which I see
Jack has responded. Thank you Jack!!
73,
Geoff
LX2AO
On July 15, 2012 at 2:02 PM, Don KD8NNU wrote:
Being a SDR there is really no suppressed carrier as the carrier is
never created only the sideband for the mode
Wiley,
The resistance between U6 pin 8 and ground was 295 ohms in my K2 built in
2003, before the RF board was assembled with the front panel and Control
board.
Hope that this helps.
73,
Geoff
LX2AO
On July 14, 2012 at 10:25 PM, Wiley Kling wrote:
I am building a recently purchased K2,
Robert,
The Perseus SDR, which uses a computer for display and control purposes,
performs very well as a panadapter, also as a multi mode receiver which
covers 10 kHz to 40 MHz
The maximum span which can be displayed is 1600 kHz, and the minimum span is
800 Hz. The resolution bandwidth is
Hi Dave,
It might be worthwhile to keep an eye on 6m if you are not already doing
this, you might find some S. Americans (LU, CE etc) coming through via a
TEP or TEP + Es path. During most of this month stations in South and
Central America have been heard here at good strength on 10m
I spent many hours under the hot African sun in Natal South Africa during
the 1940s using the 19, which was the beast which those of us in the
signals group of my school's cadet corp had to use. The 19s which we had
included the VHF B, and during one exercise a school friend and I
discovered
Neil,
Were you able to see if the shortened fan dipole used by the county ERC has
the feeder connected to all three elements, as would be the case with a
typical fan dipole?
If the feeder is connected *only* to the mid-point of the longest element,
and the two shorter elements are unbroken
Hello Bill,
You are not alone, no posts received here either yesterday June 21st. Based
on past experience I do not believe that Elecraft is to blame.
I posted a message to the Elecraft List yesterday at 19:13 Luxembourg time,
and it did not appear until 09:28 today, along with several other
Phil,
If of any help to you, I did use a Toshiba Laptop power supply to run my
K2's receiver continuously (i.e. 24/7) for almost 3 years in Scotland during
a propagation study. This supply's output is stated to be 15 V DC, and its
current rating is 6A.
Because this supply's voltage output is
Fred and Van,
Some comment follows.
On June 09, 2012 at 7:03 AM, Fred Jensen K6DGW wrote:
snip
OK Van, multiple questions. What most folks call splatter is caused by
driving the last amplifier stage into saturation [i.e. it can't produce
any more power so it clips off the peaks]. It
Van did ask , and I quote:
Is this what is known as splatter? Is the station overdriving their
transmitter or linear? Is their ALC or compression too high? Is the
frequency
response of their microphone too wide?
73,
Geoff
LX2AO
On June 09, 2012 at 4:19 PM, Adrian vk4...@bigpond.com wrote:
Has any owner of a K3 measured the level of in-band and out of band spurs
generated by the K3's transmitter when running 100 watts CW, all bands 160m
to 6m?
TIA.
73,
Geoff
LX2AO
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Hello David,
If a PSK signal is generated in an early stage of a transmitter (or is fed
into an input of a transmitter), then all of the transmitter's stages which
follow should be linear to keep the signal clean. In the case of the
basic type of PSK 31.25 signal consisting of a single tone,
Oooops :-( In my message to David Moes, I said:
phase results in sidebands spaced
31.25 kHz each side of the main signal. If the transmitter's stages which
follow are not adequately linear, then IMD products could create
splatter.
I meant 31.25 Hz not 31.25 kHz.
73,
Geoff
LX2AO
Geoff,
Even if WS did know that someone in the UK was dealing with Elecraft
directly, I very much doubt that WS could or would want to do anything to
prevent that person from doing so.
My understanding of exclusive in this context, is that WS have been
chosen/ asked/ appointed by Elecraft to
Hello John,
Because I see that the birdies are spaced approximately 13.5 kHz apart,
leads me to ask whether you are using a linear or a switching type of power
supply.
Second question, do you still see these birdies at the bottom edge of the
10m band?
73,
Geoff
LX2AO
On May 22, 2012 at
Hello John,
Thank you for your reply, and my apology for not being able to return
sooner.
I am inclined to think that the source of these birdies is external to
your K3, and getting into the receiver via some connecting cable(s).
The reason why the birdies are less noticeable on the
It will be interesting to hear if the Flex 6000/6700 when used in Europe can
deal with the European 40m BC stations.
Some data.
Over a period of several months when I was in Scotland, I measured the level
of these 40m BC signals with which a receiver must cope. Using a 40m dipole
at 70ft AGL
Hi Stewart,
As I am not familiar with the P3, and I do not know how many markers are
available, but if several markers are available then your suggestion if
followed would remove a lot of mental arithmatic during a DX pileup. I use
my Perseus as a panadapter, and it displays the frequency
To add to Vic's comment, the connections between the tape and the feeder
would have to be well protected against moisture and rain. Any corrosion of
these connections could result in BCI to nearby FM broadcast receivers - the
rusty bolt effect.
A very neat and sturdy 6m yagi built by a friend
Hi Gian,
Did you find that your diplexer termination for the filters also prevented
the changing input impedance of HAGC controlled amp Q1 from changing the
Group Delay Variations of the filters, especially the narrower filters?
My apology for not replying to your last email, will explain
Ron,
You asked if it is normal to hear birdies, the short answer is not always.
Most superhet receivers, but certainly not all designs, will be affected by
birdies. Unfortunately many if not most of the receivers designed for the
amateur market use an open plan layout without shielding nor
Fred,
Delighted to hear that you have got rid of those spurs !
My hunch is that the steady carrier, which you were seeing 15 kHz down or so
on all bands, originates in the P3 rather than the K3.
73,
Geoff
LX2AO
On May 08, 2012 at 00:03 + 0200, Fred Jensen wrote:
Original post: While
Stan,
Looking at your KX1's 20m Tx spectrum shown in your picture, my impression
is that the wide pedestal in the bottom part could be due to phase noise. I
will return to this later. However as I do not own a P3, which I think you
are using, I am not familiar with how signals look on the P3
Hello Stan,
If Q7 is not conducting and is not in effect grounding one side of CA, then
a loop is created between the input (Q1 Gate) and output stage of the
transmitter. Part of this loop contains the Rx RF Gain pot R1, the Rx's
input tuned circuit, and the coupling between pins 1 and 6 of
But that requires the use of solder :-)
73,
Geoff
LX2AO
On May 09, 2012 at 02:02 +0200, Don Wilhelm wrote:
Actually, there is an easier test - just put a temporary jumper between
the connector and emitter of Q7. Do not expect it to receive with that
jumper in place, but observe what
I beg to differ Don, are you not aware that Wayne and his colleagues are
working on an ESP option for the KX3, which is causing the shipping delay?
This option will be a first, and will allow DX to be worked after Dec 21,
2012, the day on which we find ourselves shot into different parts of the
Ken,
When you do the research and math, worth bearing in mind that powdered iron
(and ferrite) cores can generate intermodulation products. Usually this
problem will affect the receive performance of an antenna matching
network, or a receiver's front end filters, if exposed to strong signals
Fred,
Do the spurs appear on all bands?
Are the spurs still there if you disconnect the antenna from your K3?
When you tune, does the fequency of each spur change by the same amount as
the change in zero beat frequency due to tuning?
If the spurs disappear, then their source is outside of the
Bob makes a good point IMHO in that cutting the part in half is not a good
idea, it can damage the pads - been there g Better, I suggest, to
unsolder both ends at the same time, and then remove the part off the board.
Unsoldering one end and lifting that end can also stress the pad at the
Ron,
After buying my K2/100 about ten years ago, first commercial rig owned since
being first licensed in 1946, I did not start to build the KPA100 amplifier
until a year had passed because I was having too much fun using the K2
barefoot both on SSB and CW. The great majority of my SSB
Ed,
Please could you tell me the Zulu times during Friday, Saturday and (maybe)
Sunday nights when the WD2XSH stations will be active?
73,
Geoff
LX2AO
On April 13, 2012 at 18:23 +0200, Edward R. Cole wrote:
Special event on 600m for Anniversary of Titanic sinking:
April 13, 2012
John,
To add to Ron's advice, If you use tweezers to hold the part, do not use the
type known as Locking Tweezers. These are guaranteed to launch the SMD
across the room.
Also,
If you have a cat, bolt the cat to the floor or bribe it not to help.
73,
Geoff
LX2AO
On April 12, 2012 at 16:52
Igor,
When the problem appears, is the offset always the same plus minus say 5 Hz?
Also, did you try knocking the RF board in the region of the PLL reference
oscillator's crystal X1?
73,
Geoff
LX2AO
On April 08, 2012 at 10:28 +0200, Igor Sokolov wrote:
Just discovered that knocking RF
Vic,
Before you write off truly balanced tuners in favour of the T-network +
balun g, it would be interesting to measure and compare the current in
each wire of the feeder (while transmitting a carrier) when using the
Matchbox and then the T-network + balun?
73,
Geoff
LX2AO
On April 05,
Did the Sniffer give you similar anomalous results when you were using the
T-network + balun? Also I assume that the indoor run of 450 ohm window line
well clear of any object which could affect it.
I suggest that we go off List should you like to discuss this further.
73,
Geoff
LX2AO
On
Bill,
Your first posting sent 01 April 2012 at 18:47:19 -0400 was received here,
but not until 02 April 2012 at 17:16:32 +0200.
mailman.qth.net appears to have been the cause of this long delay.
Sorry I cannot answer your question.
73,
Geoff
LX2AO
- Original Message -
From: Bill
Ed KL7UW,
After sending you a message at 01:06 Luxembourg time this morning, with copy
to the List, I received the following:
Quote
The following message to kl...@acsalaska.net was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 571-5.0.0 Dynamic zone 195.46.255 not
Ed,
A very important consideration when measuring the IMD performance of an
amplifier (or certainly a receiver), is that the level of any
intermodulation products generated by the test equipment must be low enough
so that they do not introduce measurement error. Among the usual sources
of
Olli,
Would adding a low gain broadband linear amplifier between the KPA500's
input and the 10 watt driver be a useful alternative to modifying the
KPA500?
I assume that during receive this amplifier would have to be bypassed.
73,
Geoff
LX2AO
On March 15, 2012 at 23:32 +0100, Oliver Dröse
They do :-) Another way to feed dipoles cut for different bands using a
single feeder which I find to be less fussy, is to configure the dipoles as
Coupled Resonators, with the feeder connected to only one of the dipoles -
usually to the dipole cut for the lowest frequency band. The dipole
Hello Jim,
Unfortunately I do not know offhand of a source of small PCBs which would
suit your need, but some years ago when fiddling with my K2/100 and adding
some surface-mount devices, I wound up having to make some small daughter
boards.
The type of PCB from which I cut these small boards
Simon,
Do you have another 2m receiver, or know somebody who can receive the
beacon, to check whether or not the beacon's frequency is jumping. If the
beacon's transmitter is crystal controlled with the crystal in an oven, the
jumps in frequency you hear could be due to the beacon not your
Hello Kevin,
Sorry to hear that your new antenna has been felled by trees. If of any
interest to you I can send you a sketch of a Counterweight Fuse
arrangement which I used in Scotland to prevent any of my wire (Flexweave)
antennas being broken should a tree fall across an antenna or its
Hi Al,
Indeed one could combine amplifiers by using Hybrid Combiners. However when
used for SSB and especially if driven by a typical amateur solid state
transceiver working from a 12V DC supply, a potential problem to be
considered is that the level of Odd Order IMD products as seen at the
Kevin, thanks for posting Paul Harden's comment on solar flares.
If you Google Heliotown you will find recordings of the sudden but
relatively short lived increase in background noise as heard on some HF
bands as the result of a solar flare.
During the events which I have heard on 15m, 10m and
I used a Toshiba laptop computer power supply to power my K2 (receive only)
for almost 3 years nonstop 24/7 during a propagation study, although I did
add a voltage regulator placed betweeen the supply's output and the K2. This
particular supply is rated to deliver up to 6 amps at 15V, but its
When the KPA500 is in standby, I assume that its AC mains is still
connected. Have you tried pulling the KPA500's mains plug to narrow
the search?
Is your P3 sitting between the KPA500 and the K3?
73,
Geoff
LX2AO
On January 13, 2012, at 18:20 +0100, Phil Hystad phys...@mac.com wrote:
snip
Wayne's recent comment about promoting a Chemist makes me think that
Elecraft is working on some sort of antidote or relief from this particular
UP UP problem.
Please bear in mind that working these guys umpteen light years distant from
us would probably involve mental telepathy not radio, so
Hello Mike,
Happy New Year to you, and I hope that Father Christmas was good to you!
Forgive my ignorance, but what is the K3 H Mode mixer, and which type of
switches does it use?
I have been using H Mode mixers in my homebrewed receivers since 1994 with
useful results. For example my most
Steve,
Installing a buffer amp such as the Clifton Labs Z1 - K2 is the
cleanest solution, but there is an alternative if you are just playing :-)
Depending on the level of the natural noise floor of your Spectrum Analyzer
and the interconnecting coax's capacitance, the IF signal at the
Hi Guy,
OK I'll own up. I have used isolation transformers as recently as this
year before leaving Scotland, in the feed system of a Laport Rhombic (dual
rhomboid). I used this antenna, aimed towards your side of the pond, to
listen for VHF signals between 88 MHz and 148 MHz in the pious
To all readers of this 'Discussion List' may I send you my greetings and
wishes for a happy Festive Season, and for a healthy and prosperous 2012
when it comes.
A special thanks to all those at Elecraft, without whom this community
would not exist.
73,
Geoff
LX2AO
Steve,
Maybe a long shot, but try removing U6 (Control Board) from its socket and
plugging it back in again - with power off of course while you do this :-)
My K2 froze in similar fashion about 2 years after I had built it, and the
cause was poor contact between one or more of U6's pins and
Morning Fred,
When you see what appear to be the harmonics of WWV's audio tones, have you
tried reducing the level of the signal reaching the K3 - P3 (e.g. by turning
on the K3's ATT)? If ATT is switched ON, does the amplitude of each tone
harmonic seen decrease by the same amount (in db) as
Hi Keith,
So glad to hear that you are enjoying the hobby, and I hope that you will
continue to enjoy it for many years to come.
My first transmitter (1946) was built on a wooden breadboard borrowed from
my Mother, I did ask her before using it!
Happy holidays.
73,
Geoff
LX2AO (VQ8AK,
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