Elecraft has been good about keeping earlier products available, at least until
some part becomes impossible for them to source. I sincerely hope the K3s
remains among the product offerings, as a new bigger radio will be less
suitable for some portable uses even if it is designesd with
Tonight I attended a presentation by Ned Stearns AA7A on the Dxpedition version
of FT8, and his extensive architectural design contributions to the Baker
Island operation as well as his input to Joe Taylor's work on the protocol.
While most of us don't need anything like the Baker station
If I understand correctly what Rich is saying, it could be exemplified like
this: "If you want e.g. a 2.1 kHz bandwidth to receive a digital signal, and
use a 2.1 kHz roofing filter in addition to a DSP setting of 2.1 kHz, you
may find that it won't decode as well as using a 2.8 kHz roofing filter
This list has discussed replacement of the ear-surrounding pillows. My CM500
is not very old, and the ear pillows are holding up fine. However, I
recently hurt an elbow, and I am temporarily one-handed. While putting on
the headset with one hand, I made one side of the headset catch on one side
of
in other equipment, and not a
standalone box ready to place on your desk. It does incorporate an AF power amp
for driving a speaker, and the input may be driven from the radio speaker
output.
73,
Erik K7TV
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Erik Basilier
The noise level at my QTH is not nearly as bad as many of you have. The K3
S-meter tends to read around S4 on the background noise noise (SSB bandwidth,
20m preamp off, atten off). When it comes to engaging NR, like many others I
have in the past tended to crank up the aggressiveness etc and
My apologies for going far OT here. Any replies direct only please.
I am trying to fix the broken N connector on a surplus 100W dummy load, RELM
T44004.
The female part has lost 2 of its 4 fingers, and needs to be replaced. The
connector has a standard size square flange with 4 screws. (This is
Ignacy, for many years I was using a legal limit tube amp in combination
with a manual tuner. For 20m and up, where the antenna has low swr and broad
bandwidth, I would put the tuner in bypass position. For 40m the tuner would
be active and I would manually adjust it, which didn't happen very
10/16/2018 10:24 PM, Erik Basilier wrote:
> My main 40m antenna meets that requirement over a significant portion
> of the band, but at band edges swr can be 4.5:1 or so.
Hmmm. 40M is not very wide (only 4.2%, as compared to 80M which is 14.3%).
What kind of antenna is it? Simple antenn
The KPA1500 is right now outside my budget, but there is nothing wrong with
dreaming and planning, right? The latest QST reviews the new Palstar amp,
which first seemed attractive, but I soon noticed that its continuous
carrier capacity is no better than the KPA500. Also, when you add the price
of
I do something similar, but tin only a very short tip of the braid, then use
an awl to create a hole in the untinned braid near the end. Using 1/2" wide
flat braid.
73,
Erik K7TV
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Jim Cassidy
Sent: Saturday, October
The ease of changing CW pitch in the K3 is indeed a great asset in setting
things up for best copy, and I have found myself using it quite a few times.
The immediate reason to change pitch has usually been a perception that with
the existing setting, the best copy pitch does not exactly coincide
$100 shipped to the lower 48.
Contact me by email off list.
73,
Erik K7TV
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This
As Jim K9YC has pointed out in his writeup on baluns etc, there is a
threshold effect when one applies a choke to reduce common mode current. The
current is determined by driving voltage and total (complex) series
impedance. The choke RF impedance will have a reactive as well as a
resistive
I have the 20Ah Bioenno battery and am very pleased with it. I did have some
issues with the company, but the way they resolved the issues makes me want to
recommend them. The first issue was, I wanted a light battery to power a 100W
radio, and first ordered a 15 Ah model, based on the website
Finding myself wanting to listen to both sidebands of ham AM stations. Would
keep the 1.0 kHz except no sockets are open for the AM filter. I might
approve some monetary adjustment as part of the trade. Please send me your
offers off list.
73,
Erik K7TV
Don,
Yes, good point.
73,
Erik K7TV
-Original Message-
From: Don Wilhelm
Sent: Tuesday, July 10, 2018 8:56 AM
To: Erik Basilier ; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Breakers for KPA1500?
Erik,
One of the benefits of using a new and direct line to the breaker box to power
It is abundantly clear that 3 conductors plus protective ground are needed
if there will be any load, on the same circuit, that requires 120V as
opposed to 240V only. I certainly agree 100%. It is also clear that the
person who installs 240V for the PA only could get away with one conductor
less.
Anyone who has looked inside a good coaxial relay or switch knows that for
that level of isolation the mechanical construction one needs to provide a
more or less complete shield around the chosen signal path, that re-forms
around the new path when the swich is operated. This is complicated and
The com ports used for physical control of the radios are normally set up
when I first put a K3 into operation. The MicroHAM router deals with
additional com ports that are not physical but serve to provide
communications between pieces of software within the computer. When choosing
those com
I run two K3 radios with MicroHAM u2R for SO2R in N1MMplus.
It has been working, but occasionally I get a message about COM port
conflicts, about the two COM ports that are used to control the radios, and
this causes problems during a contest such as tomorrow
I have spent some time looking
I was transmitting wspr on 40 at 100 mW from a WSPRLite tx, and monitoring
on an antennaless K3 in SSB mode (just listening in SP3, not trying to
decode). (Background: I have for a while been fascinated with how room
accoustics will sometimes, with a given head position, make the tone in cw
I plan to participate using my K3, mostly on 40m, as part of the W7MOT team.
We do class 2A, and the other station uses a brand K rig.
73,
Erik K7TV
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of aj4tf
Sent: Saturday, June 09, 2018 9:49 AM
To:
enormously irritating. I
refuse to speak to my car to ask it to do something, and refuse to use Alexa or
Siri etc in a voice mode.
73,
Erik K7TV
-Original Message-
From: Gerry leary <gerrylear...@icloud.com>
Sent: Saturday, May 19, 2018 5:33 PM
To: Erik Basilier <ebasil...@cox.net>
I know that many people love controlling everything from a PC, but that is for
me a don't-want, as I don't want the extra box to start up, and using a mouse
and keyboard is much less convenient than knobs. Of course, using contesting
software does involve the PC, but even in that situation I
I am currently using two K3 radios with various updates including the new
synthesizers, and see no reason to go the the K3S model. Years ago I added the
second receiver to my original K3. I liked the diversity capability, but I am
not much of a DX'er and eventually got rid of the second
Igor, are you saying that you could not view the numbers at his website? If
anyone has difficulty getting to the numbers, let me know and I can repeat them
here, but for now I will just refer you to the website again.
Here is a short url for that page:
https://tinyurl.com/ycn9kbss
Scroll down to
s large signals at least as well as the rx itself."
73,
Erik K7TV
-Original Message-
From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On
Behalf Of Erik Basilier
Sent: Friday, April 06, 2018 8:28 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OE3H
h.net <elecraft-boun...@mailman.qth.net> On
Behalf Of Erik Basilier
Sent: Friday, April 06, 2018 5:06 PM
To: 'Bob DeHaney' <bobdeha...@gmx.net>; elecraft@mailman.qth.net
Subject: Re: [Elecraft] OE3HKL's Measurements
The German website describes how this om has developed his capabilities over
The German website describes how this om has developed his capabilities over
the years, based on his specific circumstances and needs. This has resulted
in a measurement technique with arguable advantages, achieved with a
homebrew, very specialized test setup, implemented for the 40m band. While
Brian, thanks for that tip. I bought this K3 used, so I didn't put it
together. Will have to inspect to find out if pads are installed. The serial
# 2241 suggests to me that the pads might indeed be missing.
Recalibrating the wattmeter plus TX gain did not eliminate the problem of
the K3 powering
Behalf Of Erik Basilier
Sent: Tuesday, March 27, 2018 9:42 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] K3 powers off when after several minutes of 12W carrier
I have been testing sustained power capabilities of wideband HF transformers
for feeding EFHW antennas. This involves running high
I have been testing sustained power capabilities of wideband HF transformers
for feeding EFHW antennas. This involves running high power through HF
transformers back to back into a dummy load. When running 200W out of the
KPA500, the K3 was indicating 12W, and I think that means the 100W PA was
https://arstechnica.com/science/2018/03/spacex-launch-last-year-punched-huge
-temporary-hole-in-the-ionosphere/
73,
Erik K7TV
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Help:
Generally I agree with the idea that it is best to buy quality and only pay
once. If you work with the item all the time, there is no doubt at all.
However, for amateur use the same often applies only if one views the deal
over many years. One should ask oneself whether the high-priced "quality"
I bought my KPA500+KAT500 combo (great used condition, but power calibration
was way off) for $2100 shipped on 3/14/2017. I have seen several sell on QRZ
since then. If you keep watching there, you will find some. I just used
their "search" function to see some recent deals. One KPA500 went for
t] KPA1500 and FT8
On 3/4/2018 11:58 AM, Erik Basilier wrote:
> The reason seems to be that they have been taught to use a wide
> receiver in combination with a sound card, so as to get a panoramic
> view including other stations. This lets a strong nearby station
> control the agc,
Use of more power than necessary is likely to bother someone who is using
the same frequency in a different locale.
There seems to be a large majority of digital modes operators that object to
the use of high power.
The reason seems to be that they have been taught to use a wide receiver in
e winner.
73,
Erik K7TV
-Original Message-
From: Rick WA6NHC [mailto:wa6...@gmail.com]
Sent: Sunday, February 25, 2018 2:52 AM
To: Erik Basilier <ebasil...@cox.net>
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 faulting on high VSWR on power rise
Hi Erik,
I'll
worked much much better. Like others have said so often and so well: If you are
going to bury radials, it will take many of them.
73,
Erik K7TV
-Original Message-
From: Rick WA6NHC [mailto:wa6...@gmail.com]
Sent: Saturday, February 24, 2018 10:30 PM
To: Erik Basilier <eba
apparently don't add any common-mode chokes, I am fairly confident of success.
73,
Erik K7TV
-Original Message-
From: Rick Bates (WA6NHC) [mailto:wa6...@gmail.com]
Sent: Saturday, February 24, 2018 1:35 PM
To: Erik Basilier <ebasil...@cox.net>
Cc: elecraft@mailman.qth.net
Subject: Re: [El
I am not familiar with the protector you use, and how it is specified, but it
seems to me that any such device intended for use on a transmission line must
strike a fine balance between low breakdown voltage (for protecting your gear)
and high breakdown voltage (to accommdate the power level in
A recent Elecraft newsletter stated that "the KPA1500 is a high duty cycle
amplifier compatible with most digital modes ranging from RTTY through JT65
etc.". The KPA1500 manual specifices for 50 MHz "Maximum 50 sec key down /
50 sec standby (Rec. Min Fan Speed set = 2)".
My question: For the 50
: Wednesday, November 22, 2017 10:42 AM
To: elecraft@mailman.qth.net
Cc: donw...@embarqmail.com; Erik Basilier <ebasil...@cox.net>
Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30
Hi Eric,
Don't give up on WSPRlite, with experience you'll learn that its an
exceptionally powerful a
formulas be tailored further to fit the beamwidth of a
beam, and to compensate for different parts of the worlkd having different
densities of WSPR receiving stations.
73,
Erik K7TV
>73,
>Don W3FPR
On 11/21/2017 8:40 PM, Erik Basilier wrote:
> I hope my interest in WSPRLite antenna comparisons do
K7TV
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik Basilier
Sent: Sunday, November 19, 2017 11:13 PM
To: donov...@starpower.net; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30
Hi Frank
Ignacy,
For an end-fed wire, I would see the possibility of power losses not only in
the feed feeder, but also in the tuner, the transformer, and the effective
counterpoise path. For low counterpoise losses, small counterpoise current
is desirable, which means a high antenna impedance. When a
Hi Frank,
Thanks for your very useful comments. Below my answers:
>Radiation results from RF current flowing in an antenna. An RF
>ammeter is a useful instrument for measuring the relative efficiency
>different types of matching networks feeding similar antennas.
Granted. I might want
I am well aware of that, Frank, and in fact I have multiple cores sitting here
waiting for such measurements. However, performance of an isolated component is
less important than overall system performance, where the matching to antenna
impedance as well as counterpoise current routing and
Erik K7TV
-Original Message-
From: Bill Frantz [mailto:fra...@pwpconsult.com]
Sent: Sunday, November 19, 2017 1:03 PM
To: Erik Basilier <ebasil...@cox.net>
Cc: 'JT Croteau' <jt.to...@gmail.com>; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 Field Ant. for 80/40/30
A u
That group sounds interesting, thanks.
73,
Erik K7TV
-Original Message-
From: VE3GAM [mailto:ve3...@rogers.com]
Sent: Sunday, November 19, 2017 12:09 PM
To: Erik Basilier <ebasil...@cox.net>; 'JT Croteau' <jt.to...@gmail.com>;
elecraft@mailman.qth.net
Cc: Al VE3GAM <ve
End-fed antennas have gotten popular lately. When I look closer I see two
different popular approaches.
The first uses a 9:1 impedance transformer in combination with a wire length
that is not resonant on any band. The idea is that (assuming there is no
significant feedline length) you have a
Frustrated by the weight, size. cost and wires of a KX3 + KXPA100 combo for
light 100W portable operation, I got a Yaesu FT-891 (but keeping the KX3
which is superior when 100W is not needed). Going into this I knew that the
891 has horrible phase noise, but that is of no consequence since this
I normally use either a dual paddle Begali or Bencher, but recently I purchased
a (dual paddle) Palm paddle for portable operations. At this point, I haven't
had time to play with adjustments, but adjusted from the factory it feels
distinctly soft under finger pressure, almost like the lever
In my post about setting up the CWOPS training outside of the organization, I
omitted the following. When discussing the idea with a CWOPS representative, I
said some of our presumptive participants might not be able to do Skype. I
suggested that we instead use an FM net over a repeater. I was
I learnt CW the old way around 1962: starting at slow speed, but I believe that
is not the best way. Recently a local club I belong to (most of the guys are
fm/repeater types, but a few are interested in reviving/building their CW
skills) asked me to think about a possible CW training program.
The 117V AC may be produced by the vehicle using an inverter similar to those
sold as separate devices. Years ago I was using one of those and found out that
they would not allow the ground pin on the AC outlet to be connected to the 12V
minus connection. If that is the case, you would have to
Please reply off list only. For those who want to follow this discussion,
just send me an email and I will be happy to include you on my own little
list, that was established some time ago when I sought advice on replacing
my central A/C system without generating RFI.
After the previous
Great tip, thanks! However for ultimate convenience, padding and shielding
should be provided by one and the same container.
73,
Erik K7TV
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob Novas
Sent: Wednesday, September
I just googled "EMP frequency spectrum". A quick look suggests that
amplitude is down significantly in the vhf range, so given the size of an
ammo can, it would probably be ok even if the lid is connected at only one
point. However, it seems that there is significant spectral content up into
the
I have always used temporary solutions for storage of my smaller radios,
such as the KX3 and KX1. Commercial cases providing padding and ideal fit
have been discussed before on this list. However, I never felt that the
products suggested would meet my needs. In the back of my mind I have long
In Search of Better
The following is a rambling tale of situations, real and imagined, where my
Elecraft equipment leaves something to be desired.
Written mostly during my time confined to home while recovering from back
surgery, it reflects a tendency to focus on operating
from other
I have my email client set up automatically to move *all* messages from this
list to one folder. Right now I have enough spare time to go to that folder
every day and read what interests me. I guess that is similar to reading the
digest. At times when I am very busy, I just don't look at the
Need to replace my A/C, and worried about getting an RFI generator.
A few years ago I saw some advice about taming a new unit, and maybe even
getting instructions from the manufacturer.
Things change all the time, and at this point I would like to hear from
anyone with fresh advice: Brands to
* Band pass filters are likely to be specified for operation at any
impedance consistent with a certain maximum allowable swr. Mine (made by
LBS) tolerate swr up to 2:1. As long as the antenna meets that requirement,
there is no need for a tuner between filter and antenna.
* A good multiband
I learned morse by copying from 78 rpm phongraph records, gradually
increasing the speed, but I believe modern methods based of Farnsworth are
far superior.
My club asked me to think about how the club could conduct cw training. I
searched for resources online, and was very impressed when I
Ian,
I don't have any suggestions for a solution beyond what others have already
mentioned, but as a side note I would like to discuss the concept of "off
frequency".
It seems to me that these days, on the HF bands that I frequent, more and
more people tune SSB to where the displayed frequency
Just for the record, when I refer to a possible dot matrix display for a
radio, I envision something with the resolution of an iPad, i.e. you can't
see the dots, and it can be made to look exactly like the current display.
73,
Erik
-Original Message-
From:
Controls: There are some people for whom everything ought to be controlled
from a general purpose computer, but I think most Elecrafters agree that
"real knobs" are better, and Elecraft has done a superb job in judging what
variables are deserving of the real knob approach. There will always be
Sorry if this is too OT for most:
I am considering security cameras for my home/qth. There are a lot of
package systems available these days, but my initial interest is for a
single camera mounted near the top of my tower/mast (rotatable of course).
Already available at the mounting point is a
Enhancement
May I mention that for SO2R in the same box the isolation should be in order of
80db for 1500 w power level.
This is not that easy to obtain.
73, Igor UA9CDC
27.04.2017 7:59, Erik Basilier пишет:
> Of course, in an SO2R scenario where the shared amplifier alternates
> betwe
Of course, in an SO2R scenario where the shared amplifier alternates between
two different bands with every transmission, a shared ATU would exercise the
relays a lot. Separate tuners might be needed in order to avoid the relays
wearing out.
73,
Erik K7TV
-Original Message-
From:
On 4/26/2017 2:46 PM, Erik Basilier wrote:
>
>
> -Original Message-
> From: Erik Basilier [mailto:ebasil...@cox.net]
> Sent: Wednesday, April 26, 2017 11:43 AM
> To: 'Rick Tavan' <r...@tavan.com>
> Subject: RE: [Elecraft] OT: Package shippers
>
>
-Original Message-
From: Erik Basilier [mailto:ebasil...@cox.net]
Sent: Wednesday, April 26, 2017 11:43 AM
To: 'Rick Tavan' <r...@tavan.com>
Subject: RE: [Elecraft] OT: Package shippers
In the past I have used UPS extensively, but recently they refused to ship
my expensiv
When the original poster referred to SO2R capability, I think he meant one
amplifier being able to handle transmission from both radios. At 100W having a
separate amp as part of each radio is no big deal, but at the price of a
KPA1500, one really wants to pay for only one, given that SO2R means
: Saturday, April 22, 2017 3:03 PM
To: Clay Autery <caut...@montac.com>; Erik Basilier <ebasil...@cox.net>;
elecraft@mailman.qth.net
Subject: RE: [Elecraft] FW: Handles and feet
How about a small block under the soft handle? The handle would then easily
protect another piece of equipment.
73
73,
Erik K7TV
-Original Message-
From: Clay Autery [mailto:caut...@montac.com]
Sent: Saturday, April 22, 2017 1:14 AM
To: Erik Basilier <ebasil...@cox.net>; elecraft@mailman.qth.net
Subject: Re: [Elecraft] FW: Handles and feet - was KPA 500 vs New 1500 watt
amp
Never said I would
the right glue chemistry for the
application and have it applied to the Sorbothane discs...
73,
__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 4/22/2017 12:32 AM, Erik Basilier wrote:
>
>
>
>
> From: Erik Basilier [mailto:ebasil...@cox.net]
> Se
From: Erik Basilier [mailto:ebasil...@cox.net]
Sent: Friday, April 21, 2017 9:45 PM
To: 'Harry Yingst' <hlyin...@yahoo.com>
Subject: RE: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp
Harry, I have considered doing the same. However, my experience with using the
As the number of Elecraft boxes on my shelf has grown, what I have long
feared has recently happened: The handle on one box (or probably a screw on
the handle) created a small scratch on the nude side of neighboring box. It
looks like the KPA1500 handle design is unchanged. Maybe it is time for an
Would it not make sense to produce a KX3S that combines the KX3 with the PX3,
doubles the output power, and provides a full complement of I/O connectors, and
a new powerful Li-based battery?
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of KD6QZX
Being able to clearly "hear the difference" might be a good criterion if you
are focused on the individual contact. If you are in a contest, making
hundreds of contacts, 1 dB makes a meaningful difference even if you cannot
hear the difference on any of the contacts.
-Original Message-
Using my KAT500/KPA500 installation, I notice that I avoid using the tuner in
AUTO mode, because the loud relays distract me when I am tuning around. In
fact, I tend to disable the KAT500 and turn on the KAT100 in the K3.
Therefore: A KAT1500 should either have sound absorbent materials built
Perhaps a new, legal limit power amplifier should be non-linear so as to
achieve very high efficiency. Broadcasters seem to use such designs
routinely, and the latest QEX described a ham version under development.
__
Elecraft mailing
Now I have the KPA500 and KAT500 actually up and running for the first time.
I am very happy with my purchase, and the combo is better integrated than
anything else I have used.
By integrated, I mean the boxes work together well.
The fact that they are separate boxes, that I could purchase at
Chris,
Shack simplification and cable reduction are indeed big values. But it can
lead to big boxes that are identified with a pre-conceived use case vision.
Other companies have made a good living from selling new generations of such
boxes. There will always be a market for that, with customers
Well said Chris. I would add:
Modularity should include combinations of power amplifier modules.
Once there is more than one amplifier module, one may ask: Does it ever make
sense to use them in a way where the output power is not combined? When
output is to be fed alternately to different
Regarding spending capacity, I agree that the Elecraft KPA1500 with tuner
would be too expensive to appeal to a lot of people, including myself.
However, looking back I can see that I have been able to spend a smaller but
substantial amount several times. A modular approach to the design would
-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik
Basilier
Sent: Friday, March 17, 2017 3:00 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] Linear thoughts
To make this an Elecraft amp, it should be designed based on the best
architectural ideas from the Elecraft trad
To make this an Elecraft amp, it should be designed based on the best
architectural ideas from the Elecraft tradition. At this point of the
evolution, this must be seen at the system level, including the (never-to-be
?) "K4" and all other "K-line" components.
Why such a broad scope? The
I recently sold my legal limit tube amp after a bit of a mental struggle.
The seller in me finally won after I realized that "if I can't lift it, I
shouldn't own it". I was tempted to replace it with an ALS-1306, but I
operate RTTY and in that mode the 1306 wouldn't be good for more output than
a
These problems bother me too. With a sound card hooked up, for RTTY I don't
see a need for FSK, and I don't want to deal with PTT, except for SSB where
I don't like VOX. So: Please Elecraft, let VOX/PTT be remembered separately
for DATA and SSB. And, yes, the macro capability suggested is really
I too have compared the K3 against a KX3 (with 100W) on field day. The K3 is
much more practical, in that you can have everything cabled up for all modes
of interest, so you can switch modes quickly. With the KX3, you have a bit
of a rat's nest to begin with, and you end up unplugging the
Al, your paper looks very helpful for the situation when the concepts need
to be studied. After one has a reasonable understanding of the concepts, the
stituation that comes up now and then is wanting to change some of the AGC
parameters in the K3. I don't know about others, but I tend to forget
I tend to use the CWT display a lot, and then the S-meter doesn't show 20 dB
over S9. Actively using RF gain, ATT, PRE, as one should, makes the S-meter
even less interesting. Eyes tend to spend a lot of time on the P3 display
when available. Spectrum peaks don't show how close we are to the
Vic, thanks for your comments!
Erik K7TV
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Vic
Rosenthal 4X6GP
Sent: Thursday, March 02, 2017 12:21 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] FW: Using your tower as a vertical - 160 or 80
Rich,
Thanks for your reply; very helpful!
Something similar to your shunt feeding method is what I have had in mind.
Since my tower is a crankup (55 ft topped by about 22 ft of mast+antennas),
I do have some misgivings about managing the wire running parallel to the
tower, in the scenario
Those filters are only good for 100W or so, but there is no fundamental
reason they couldn't be scaled up to 1500W. I haven't researched it, but
I'm thinking there must be commercial equivalents as well.
Alan N1AL
On 02/28/2017 10:41 PM, Erik Basilier wrote:
> Alan,
>
> Thanks for your re
to the grounded
center tap).
Works great on 80 meters without a tuner and on 40 meters with a tuner.
Alan N1AL
On 02/28/2017 09:42 PM, Erik Basilier wrote:
> Years ago, after putting up a heavy-duty crank-up tower with several
> antennas on a tall mast at the top, I was interested in load
Years ago, after putting up a heavy-duty crank-up tower with several
antennas on a tall mast at the top, I was interested in loading up the whole
metal tree for 160 and/or 80. However, I didn't like the prospect of
transmitted power getting back into the shack via the existing feedlines,
causing
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