Re: [Elecraft] K3 Knobs
Gary, It's pretty simple! Just applying a bit too much tension when tightening the screws will crack the knobs. It's happened to a lot of folks, including me. Actually, it didn't seem like it took that much pressure either, so folks need to go easy when attaching the knobs. I don't really remember ever breaking a knob like that, so it surprised me when it happened. If it didn't happen to you, you are either lucky, or perhaps a tad more restrained about how tight you mount your knobs. In the past I've often found that knobs that weren't attached fairly tight soon started slipping a bit eventually. Anyway, Elecraft has issued many cautionary statements about not over-tightening the knobs, so it's pretty obvious that it isn't an isolated problem. Dave W7AQK - Original Message - From: rfenab...@gmail.com To: Elecraft Elecraft@mailman.qth.net Sent: Sunday, May 17, 2009 8:25 AM Subject: [Elecraft] K3 Knobs For the life of me I cannot imagine what is being done to the radio to cause destruction of the original knobs. I would not want to be the second owner of those radios as I shudder to think what the rest of the radio has been subjected to. Just my initial thought. My K3 is well over one year old and exhibits no wear and tear, it has been transported often, used in the field as well as numerous operators and still looks and works just like it did on day one. Gary Sent via BlackBerry® from Telstra __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Knobs
In a recent message, David Yarnes w7...@cox.net wrote ... It's pretty simple! Just applying a bit too much tension when tightening the screws will crack the knobs. The answer for future K3s would appear to be to have flats on the RF and AF controls so that push-on knobs can be used rather than requiring a set screw. 73 -- David G4DMP Leeds, England, UK -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] : Resonance
Guy and Steve,
AFAIK, the condition of zero reactance *defines* resonance whether that
be a dipole or a tuned circuit using lumped components.
On a dipole of any length (whether resonant or not), the current must be
zero at the ends (there is no place for it to go - it is an open
circuit). If that dipole is less than 1/2 wavelength long, the current
will be a maximum at the center - lets restrict the discussion to 1/2
wave or less for simplicity. The thing which changes as the feedpoint
is moved along the antenna is the feedpoint impedance - it can be fed at
any point - the impedance will be lowest in the center and highest at
the ends.
If you plot both the voltage and the current along an antenna, you can
get an *idea* about the feedpoint impedance at any point by dividing the
voltage by the current (there are other factors like the radiation
resistance, so that is not exact) - in the center, the voltage is low
but the current is high, so the impedance (V/I) is low and it becomes
larger as you move toward either end of the dipole.
If the reactance is zero at any feedpoint, it will be zero no matter how
the feedpoint is moved - that fact only occurs if the wire is resonant -
if there is any reactance, the values of resistance and reactance will
move about the constant SWR circle on a Smith chart.
Steve, your analogy of a guitar string is OK, but what you are stating
only applies at resonance - and is thus comparable only to a half wave
dipole. The fact is that a wire of any length can be made to take power
at any frequency by feeding it with the conjugate of its feed impedance
- and a transmission line section can easily provide that at certain
lengths and characteristic impedances (or a lumped element network like
a tuner). I cannot think of an easy analogy to that for a vibrating
string feedpoint. Maybe the MEs in this group can provide that
mechanical analogy.
73,
Don W3FPR
Guy Olinger, K2AV wrote:
I was always of the impression that the definition of resonance of a
half wave radiator is the condition in which the current at the center
is a maximum and the current at the ends is at zero.
This would also be true of a 1/4 wave dipole fed in the center, or any
dipole less than a 1/2 wave. The current would be higher in the center of a
less than 1/2 wave dipole, than it would be for the same power fed to the
center of a 1/2 wave dipole. No one to my knowledge considers a 1/4 wave
dipole resonant.
I'm not aware of any standard reference that does not define as resonant a
1/2 wave dipole having zero reactance at a center feed. The classic Terman's
shows overall circuit current at resonance as being entirely resistive.
{p.46, Electronic and Radio Engineering 4th Edition, F E Terman, McGraw
Hill, 1955}
For the dipole this would be the point that the undissipated power from
prior excitation returns exactly in phase with incident excitation. This is
your grid dip meter case of maximum accepted power, hence maximum dip, and
also where a center feed displays zero reactive current.
Perhaps a better definition of a wire resonant at a given frequency would be
*if there exists* a point on the wire where a feed so placed would not
exhibit any reactance. This takes in other cases than center fed 1/2 wave
dipoles.
73, Guy.
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Re: [Elecraft] K3 KNOBS
Hi, My advice is not to use the long lever end of the hex key, insert the long end in the grub screw. 73 Tim gm4lmh __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K1 RF board DC checks failing
Mike, U3 pin 6 is the output voltage of the 8 volt regulator - it is lower than usual, but not in excess of the regulator specs (+/-10%). Pin 5 is an output from U3 and will depend on the voltage applied to pin 6. So bottom line - all is OK. 73, Don W3FPR Mike Clarke wrote: Hi all, Having received and fitted the replacement voltage regulator that solved my previous K1 problem, I've moved on to the first DC checks on the RF board (page 30 in my manual.) I'm performing the checks with the board connected to a stable supply at 13.8 volts. The first two checks pass fine, but the second two state that I should be reading between 3.8 and 4.2 volts on U3 pin 5, and between 7.6 and 8.7 volts on U3 pin 6. I'm actually measuring 3.66 volts and 7.54 volts, respectively. Normally these might count as 'close enough', but given the quality of the manual (and my soldering!) I'm inclined to think I've gone wrong somewhere! Can anyone offer a suggestion as to what I might have done? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] : Resonance
Don:
Your points are well taken.
TNX 73,
Steve
AA4AK
Don Wilhelm wrote:
Guy and Steve,
AFAIK, the condition of zero reactance *defines* resonance whether
that be a dipole or a tuned circuit using lumped components.
On a dipole of any length (whether resonant or not), the current must
be zero at the ends (there is no place for it to go - it is an open
circuit). If that dipole is less than 1/2 wavelength long, the
current will be a maximum at the center - lets restrict the discussion
to 1/2 wave or less for simplicity. The thing which changes as the
feedpoint is moved along the antenna is the feedpoint impedance - it
can be fed at any point - the impedance will be lowest in the center
and highest at the ends.
If you plot both the voltage and the current along an antenna, you can
get an *idea* about the feedpoint impedance at any point by dividing
the voltage by the current (there are other factors like the radiation
resistance, so that is not exact) - in the center, the voltage is low
but the current is high, so the impedance (V/I) is low and it becomes
larger as you move toward either end of the dipole.
If the reactance is zero at any feedpoint, it will be zero no matter
how the feedpoint is moved - that fact only occurs if the wire is
resonant - if there is any reactance, the values of resistance and
reactance will move about the constant SWR circle on a Smith chart.
Steve, your analogy of a guitar string is OK, but what you are stating
only applies at resonance - and is thus comparable only to a half wave
dipole. The fact is that a wire of any length can be made to take
power at any frequency by feeding it with the conjugate of its feed
impedance - and a transmission line section can easily provide that at
certain lengths and characteristic impedances (or a lumped element
network like a tuner). I cannot think of an easy analogy to that for
a vibrating string feedpoint. Maybe the MEs in this group can provide
that mechanical analogy.
73,
Don W3FPR
Guy Olinger, K2AV wrote:
I was always of the impression that the definition of resonance of a
half wave radiator is the condition in which the current at the center
is a maximum and the current at the ends is at zero.
This would also be true of a 1/4 wave dipole fed in the center, or
any dipole less than a 1/2 wave. The current would be higher in the
center of a less than 1/2 wave dipole, than it would be for the same
power fed to the center of a 1/2 wave dipole. No one to my knowledge
considers a 1/4 wave dipole resonant.
I'm not aware of any standard reference that does not define as
resonant a 1/2 wave dipole having zero reactance at a center feed.
The classic Terman's shows overall circuit current at resonance as
being entirely resistive. {p.46, Electronic and Radio Engineering 4th
Edition, F E Terman, McGraw Hill, 1955}
For the dipole this would be the point that the undissipated power
from prior excitation returns exactly in phase with incident
excitation. This is your grid dip meter case of maximum accepted
power, hence maximum dip, and also where a center feed displays zero
reactive current.
Perhaps a better definition of a wire resonant at a given frequency
would be *if there exists* a point on the wire where a feed so placed
would not exhibit any reactance. This takes in other cases than
center fed 1/2 wave dipoles.
73, Guy.
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[Elecraft] Knobs and Resonance
E N O U G H ! Can we get back to dealing with serious Elecraft matters please!! Tom GM4FDM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K1 RF board DC checks failing
On Mon, May 18, 2009 at 2:49 PM, Don Wilhelm w3...@embarqmail.com wrote: Mike, U3 pin 6 is the output voltage of the 8 volt regulator - it is lower than usual, but not in excess of the regulator specs (+/-10%). Pin 5 is an output from U3 and will depend on the voltage applied to pin 6. So bottom line - all is OK. Hi Don, Thanks for the response to what must seem like a trivial question to old hands! It's good to know I'm not ignoring things now and saving trouble up for when it's more difficult to debug :) 73, -- Mike, M0PRL __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 KNOBS
Posts like this are no doubt well intentioned and good advice in general. For these knobs with built in stress cracks normal care is not adequate. Use the short handle for leverage, just tighten barely enough that the knob does not slip on the shaft, expect the knob to fail while you are adjusting the knob at some point in the future. If can keep spare knobs on hand. Elecraft are taking steps to get us better knobs and I am confident they will succeed soon and do something that is appropriate, but it takes a while to accomplish these design changes. I am sure they will let us know soon. But don't assume that those of us who have had failures are ham-fisted klutzes who don't take normal precautions. That could be the case sometimes, but certainly not the general situation in this case. Willis 'Cookie' Cooke K5EWJ --- On Mon, 5/18/09, Tim Heasman t...@sideswiper.plus.com wrote: From: Tim Heasman t...@sideswiper.plus.com Subject: Re: [Elecraft] K3 KNOBS To: Elecraft@mailman.qth.net Date: Monday, May 18, 2009, 6:42 AM Hi, My advice is not to use the long lever end of the hex key, insert the long end in the grub screw. 73 Tim gm4lmh __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2: CW Alignment Questions
When I use my (recently built) K2 for CW, I find that stations that respond to me are always about 100Hz too high infrequency - meaning that I have to use RIT to listen to them at about 100Hz lower in frequency than the frequency at which I'm sending. I assume that this indicates an alignment issue in my rig, but I'm a little unclear as to what it is that needs adjusting and would appreciate advice as to what to adjust and how. For information purposes, I have my sidetone pitch set at the default of 600Hz. Also, in general, I would like to calibrate the rig using WWV at 10MHz. Since WWV transmits AM and the K2 has only sideband, I have recorded the frequency where I lose the upper tone while listening on lower sideband (10.000.03) and the frequency where I lose the lower tone while listening on upper sideband (9.999.04). I think that means that I'm pretty close on the calibration, but I'm not sure. Any help in understanding how to best use WWV on a sideband-only receiver would be appreciated. Jon KB1QBZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 KNOBS
Cookie has it right. It seems to me another issue is that many of the knobs have tight threads. Not terribly tight, but requiring more torque than I normally see on such a small screw. I had some like that on my first set. Lube didn't help. That makes it difficult to tell how hard they are binding against the control shafts. Also, I wondered if the fact they were tight wasn't due to a slightly undersized hole, so the set screw acted like a wedge pushing outward on the surrounding area as it was screwed in. A wedge like that can exert huge force on the knob even though it's not very hard to turn. That could be the source of stress cracks before the knob was even tightened. The Aptos folks have been very clear for a long time that they got a bad bunch of knobs and have replaced them as quickly as cracks have been reported. So far, my second set, received almost a year ago, has been fine. Ron AC7AC -Original Message- Posts like this are no doubt well intentioned and good advice in general. For these knobs with built in stress cracks normal care is not adequate. Use the short handle for leverage, just tighten barely enough that the knob does not slip on the shaft, expect the knob to fail while you are adjusting the knob at some point in the future. If can keep spare knobs on hand. Elecraft are taking steps to get us better knobs and I am confident they will succeed soon and do something that is appropriate, but it takes a while to accomplish these design changes. I am sure they will let us know soon. But don't assume that those of us who have had failures are ham-fisted klutzes who don't take normal precautions. That could be the case sometimes, but certainly not the general situation in this case. Willis 'Cookie' Cooke K5EWJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KPA-800 etc.
I wonder if Elecraft has ever considered doing an OEM deal with another amp maker? SPE, makers of the Expert 1K-FA might be a good candidate. Some packaging re-design to match the K2/K3, together with software changes for integrating the amp tightly with the Elecraft radios, could satisfy many of us whilst avoiding much more up-front development cost, or the delays and costs associated with approvals from the various regulatory authorities. I run all Elecraft radios, with the exception of an IC7000 for mobile, so I make this suggestion as a big fan of the company. I would not wish to see product or service standards compromised, but when it comes to these long-awaited amps, maybe it's time for a different approach, or a clear statement from Elecraft that the company does not intend to be in the amp business for the foreseeable future. 73 Bob G3YIQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 etc.
Not a bad idea, but it wouldn't be a kit. Until the K3, Elecraft was a kit company and most of us would expect a KPA-10,000 (or whatever) to be a kit. - Keith N1AS - - K3 711 - -Original Message- I wonder if Elecraft has ever considered doing an OEM deal with another amp maker? SPE, makers of the Expert 1K-FA might be a good candidate. 73 Bob G3YIQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 etc.
On Mon, 18 May 2009 17:33:29 +0100, Bob Jones wrote: I wonder if Elecraft has ever considered doing an OEM deal with another amp maker? I fail to see the benefit to the customer. OEM deals are certain to come with a cost markup for folks who add nothing to the game. The K3 works well with well made power amps. Buy one of them and use the markup for some other useful ham gear rather than make a middleman rich. Or take the XYL on a nice evening out. 73, Jim Brown K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 knob hole threads
Ron, others ... If the holes in the knobs were tapped with a normal (tapered) tap, the threaded hole will be of slightly less diameter near the bottom (shaft) end of the hole. This would tend to increase the likelihood of forcing the knob to split. There isn't enough room for a tapered tap to go far enough through the set-screw hole to produce a straight thread. A bottom tap produces a straight-sided hole even when there's not room for full travel of a tapered tap.. Not that any of this would be useful information unless one was installing a replacement knob and used a bottom tap before installing. One poster suggested using controls with shafts with flats and push-on knobs. Unless care is used or the depth of the hole in the knob and the length of the control shaft is carefully controlled, the knob is likely to end up rubbing the panel and creating rings of worn-away paint. 73! Ken Kopp - K0PP elecraftcov...@rfwave.net http://tinyurl.com/7lm3m5 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2: CW Alignment Questions
Jon, Go to my website www.w3fpr.com and follow the instructions in the K2 Dial Calibration article. That should not only calibrate the frequency readout, but also adjust the BFOs to center the CW IF filter passbands at your chosen sidetone pitch of 600 Hz. The BFO frequencies listed in the K2 manual for your xtal filter set may be close, but for optimum performance (and accuracy of the filter center frequency), use Spectrogram and a wideband noise generator for alignment. Attempting to align the BFO frequencies using a single signal is a recipe for frustration. The website article has information for aligning the CW, SSB and RTTY filters - do all that you intend to use. I strongly suggest using Spectrogram to display the audio tones (500 and 600 Hz) transmitted by WWV to determine the precise tuning of the WWV signal. If you have perfect pitch, you can do it by ear, but few of us possess that quality to a degree that will discern a frequency difference less than 5 Hz, but Spectrogram can do that for us. 73, Don W3FPR Jon Perelstein wrote: When I use my (recently built) K2 for CW, I find that stations that respond to me are always about 100Hz too high infrequency - meaning that I have to use RIT to listen to them at about 100Hz lower in frequency than the frequency at which I'm sending. I assume that this indicates an alignment issue in my rig, but I'm a little unclear as to what it is that needs adjusting and would appreciate advice as to what to adjust and how. For information purposes, I have my sidetone pitch set at the default of 600Hz. Also, in general, I would like to calibrate the rig using WWV at 10MHz. Since WWV transmits AM and the K2 has only sideband, I have recorded the frequency where I lose the upper tone while listening on lower sideband (10.000.03) and the frequency where I lose the lower tone while listening on upper sideband (9.999.04). I think that means that I'm pretty close on the calibration, but I'm not sure. Any help in understanding how to best use WWV on a sideband-only receiver would be appreciated. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 any news at Dayton?
Yes, we're still working on amplifiers. The end result may not be what anyone expects, but it'll definitely be unique. Watch for possible developments late this year. 73, Wayne --- http://www.elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] 0.5ppm implemented in firmware?
Turns out our 1 PPM TXCO already hits 0.5 ppm from 10-50 C, which was the original goal for firmware-assisted temp compensation. So such compensation isn't necessary to hit that spec. But in the spirit of making things as good as they can be, we're now hoping to achieve 0.3 ppm with firmware assist. K3 Utility will soon have a new screen for TCXO frequency/temp data entry. I will then have a bit more firmware to write to make use of the data. Thanks for your patience. Wayne N6KR On May 16, 2009, at 11:13 AM, howa...@howardz.com wrote: Hi, I am wondering if the K3's firmware has implemented the 0.5 ppm when using the KTCXO3-1 1ppm High Stability Reference Oscillator? N3ZH - Howard --- http://www.elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 hopes
Yes, we're still working on amplifiers... possible developments late this year. I've been on the KPA-800 waiting list (if it still exists) for a couple of years. If any physical changes are contemplated, I'd love to see a re-arrangement of the exterior dimensions to more easily fit into a Pelican case for shipping to distant lands. VE7XF __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Help! Wierd bandswitching problem.
Now on my list-- tnx Wayne N6KR On May 15, 2009, at 6:54 PM, drewko wrote: Try the following. Assuming all your ham bands are mapped IN, except 5.0 MHz: Starting somewhere on the 40m CW band... FREQ-ENT 5.990 ENTER Move VFO to somewhere above 6.000 BAND-UP You end up on 30m (not in the 40m ham band as you would expect). Go to CONFIG BND MAP and use BAND-DOWN to select 7.0: It has been mapped OUT. --- http://www.elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 any news at Dayton?
Hm ... unexpected and unique ... I've got it: A trail friendly kilowatt ... ;-) 73 -- Joe KB8AP On May 18, 2009, at 11:22 AM, wayne burdick wrote: Yes, we're still working on amplifiers. The end result may not be what anyone expects, but it'll definitely be unique. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 any news at Dayton?
Solar powered... Gary, VE1RGB -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Planisky Sent: May 18, 2009 4:08 PM To: elecraft reflector Subject: Re: [Elecraft] KPA-800 any news at Dayton? Hm ... unexpected and unique ... I've got it: A trail friendly kilowatt ... ;-) 73 -- Joe KB8AP On May 18, 2009, at 11:22 AM, wayne burdick wrote: Yes, we're still working on amplifiers. The end result may not be what anyone expects, but it'll definitely be unique. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 any news at Dayton?
Are you suggesting that Elecraft come out with a line of goat mounted solar panels to power this amp? Willis 'Cookie' Cooke K5EWJ --- On Mon, 5/18/09, Gary, VE1RGB garybartl...@accesswave.ca wrote: From: Gary, VE1RGB garybartl...@accesswave.ca Subject: Re: [Elecraft] KPA-800 any news at Dayton? To: 'elecraft reflector' elecraft@mailman.qth.net Date: Monday, May 18, 2009, 12:25 PM Solar powered... Gary, VE1RGB -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Planisky Sent: May 18, 2009 4:08 PM To: elecraft reflector Subject: Re: [Elecraft] KPA-800 any news at Dayton? Hm ... unexpected and unique ... I've got it: A trail friendly kilowatt ... ;-) 73 -- Joe KB8AP On May 18, 2009, at 11:22 AM, wayne burdick wrote: Yes, we're still working on amplifiers. The end result may not be what anyone expects, but it'll definitely be unique. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KXV3 versus KXV3a
What is the difference between the current KXV3 and the new KXV3a? Thanks, Julius - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 Elecraft K3#1875 -- View this message in context: http://n2.nabble.com/KXV3-versus-KXV3a-tp2935161p2935161.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 any news at Dayton?
It will be powered by time waves for those of us who are chronically challenged ;) Kevin. KD5ONS -Original Message- From: wayne burdick n...@elecraft.com Sent: May 18, 2009 2:22 PM To: Elecraft Reflector elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-800 any news at Dayton? Yes, we're still working on amplifiers. The end result may not be what anyone expects, but it'll definitely be unique. Watch for possible developments late this year. 73, Wayne __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
What is the difference between the current KXV3 and the new KXV3a? The A supports the just-announced K144XV 2 meter module. No functions or features are lost with the A; it is a superset of the current module. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
So if we already bought the KXV3 and we want to add 2 meters we have to buy it again? On Mon, 2009-05-18 at 12:40 -0700, Lyle Johnson wrote: What is the difference between the current KXV3 and the new KXV3a? The A supports the just-announced K144XV 2 meter module. No functions or features are lost with the A; it is a superset of the current module. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
The reason I ask Lyle, is I just purchased a new KXV3, which I assume will not be usable with the K144XV... I would have held off until the new board came out, had I known. Ahhh, timing is everything. Thanks for the reply! Cheers, Julius Lyle Johnson wrote: What is the difference between the current KXV3 and the new KXV3a? The A supports the just-announced K144XV 2 meter module. No functions or features are lost with the A; it is a superset of the current module. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 Elecraft K3#1875 -- View this message in context: http://n2.nabble.com/KXV3-versus-KXV3a-tp2935161p2935228.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 any news at Dayton?
Nope. Llamas. Higher off the ground for fording streams, no horns, and they smell just a bit better than goats. BUT, they do have a propensity to spit. Not anything is perfect!! Mis dos centavos, de Milt, N5IA - Original Message - From: WILLIS COOKE wrco...@flash.net To: 'elecraft reflector' elecraft@mailman.qth.net; Gary, VE1RGB garybartl...@accesswave.ca Sent: Monday, May 18, 2009 12:29 PM Subject: Re: [Elecraft] KPA-800 any news at Dayton? Are you suggesting that Elecraft come out with a line of goat mounted solar panels to power this amp? Willis 'Cookie' Cooke K5EWJ --- On Mon, 5/18/09, Gary, VE1RGB garybartl...@accesswave.ca wrote: From: Gary, VE1RGB garybartl...@accesswave.ca Subject: Re: [Elecraft] KPA-800 any news at Dayton? To: 'elecraft reflector' elecraft@mailman.qth.net Date: Monday, May 18, 2009, 12:25 PM Solar powered... Gary, VE1RGB -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Planisky Sent: May 18, 2009 4:08 PM To: elecraft reflector Subject: Re: [Elecraft] KPA-800 any news at Dayton? Hm ... unexpected and unique ... I've got it: A trail friendly kilowatt ... ;-) 73 -- Joe KB8AP On May 18, 2009, at 11:22 AM, wayne burdick wrote: Yes, we're still working on amplifiers. The end result may not be what anyone expects, but it'll definitely be unique. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.238 / Virus Database: 270.12.33/2120 - Release Date: 05/18/09 06:28:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
Brett Howard wrote: So if we already bought the KXV3 and we want to add 2 meters we have to buy it again? There is a very low replacement price for those who already have a KXV3. It is $39.95 if my memory serves me correctly from what was posted in the booth at Dayton. FWIW, I just bought a K3 so I wouldn't have to keep moving my development radio between the workbench (where it normally resides) and my operating position. I knew the KXV3A was coming -- having participated heavily in its design -- but bought a KXV3 for it so I could have the RX ANT and IF OUT features available until the K144XV is available. So, I get to pay the upgrade, too :-) 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
Does the $40 upgrade for people who already have the old KXV3 require them to return the old KXV3, or will they be able to keep it for use in another K3, sell it, or whatever? 73 -- Joe KB8AP On May 18, 2009, at 12:40 PM, Lyle Johnson wrote: What is the difference between the current KXV3 and the new KXV3a? The A supports the just-announced K144XV 2 meter module. No functions or features are lost with the A; it is a superset of the current module. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
Your choice. 73, Wayne N6KR On May 18, 2009, at 1:14 PM, Joe Planisky wrote: Does the $40 upgrade for people who already have the old KXV3 require them to return the old KXV3, or will they be able to keep it for use in another K3, sell it, or whatever? --- http://www.elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
Does the $40 upgrade for people who already have the old KXV3 require them to return the old KXV3, or will they be able to keep it for use in another K3, sell it, or whatever? Too soon to tell... I expect the upgrade will not include the hardware, cover plate, etc, just the two-board assembly. Watch this space as we get closer to the August delivery! 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Slightly OT: Elecraft K3 to Maldives
I'll be in Maldives from may 26th to june 04th I will bring my K3/100 with me with a multiband vertical antenna. Will be on the air as 8Q7GP and hope to work some of you guys. I plan to work mainly 20 and 40 meters, but I will keep an eye to the other bands too if the propagation will assist me. This is a holiday style dxpedition, so don't expect too much from me, or I could get beaten by my wife :-) I will take the laptop and I plan to do SSB and PSK31, as my CW is a little bit rusty, but never say never I still don't know if Internet will be available, so keep a look to the cluster as I may not be able to take skeds. 73 de Giulio IW3HVB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Main Radio plays in Left External Speaker Only
How can I get the main receiver to play from both L R external computer speakers? The main receiver plays in only the left external computer speakers. Using firmware 3.11. K3 audio output is connected to the soundcard input. Soundcard output feeds both the computer and auxiliary speaker pairs. Computer plays stereo channels properly in both L R external speakers. When Sub receiver is turned on it's audio plays in the right speakers and the main receiver plays in the left speakers. Headphones which are plugged in rear panel play properly with main in both ears and when sub is turned on it plays in the right ear with the main receiver heard in the left ear. Setting Config: SPKRS to 1 or 2 makes no difference. What have I set up wrong? Bud W3LL w...@arrl.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 any news at Dayton?
Speculation: Elecraft does great 'smart' things. How about an amp that takes advantage of a CW-preferring user base; tightly integrated with the K3; takes it to the next level: Class E amp, initially supporting only CW, but over time and with some firmware upgrades, and with all of the DSP capability in the K3 with appropriate signaling to the amp, could do SSB and other modes (use K3 dsp to do part of the EER). Smart tuning of the output network for best efficiency, of course, making it plug and play. -Brian N9ADG --- On Mon, 5/18/09, wayne burdick n...@elecraft.com wrote: From: wayne burdick n...@elecraft.com Subject: Re: [Elecraft] KPA-800 any news at Dayton? To: Elecraft Reflector elecraft@mailman.qth.net Date: Monday, May 18, 2009, 11:22 AM Yes, we're still working on amplifiers. The end result may not be what anyone expects, but it'll definitely be unique. Watch for possible developments late this year. 73, Wayne --- http://www.elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2: CW Alignment Questions
Jon Perelstein wrote: When I use my (recently built) K2 for CW, I find that stations that respond to me are always about 100Hz too high infrequency - meaning that I have to use RIT to listen to them at about 100Hz lower in frequency than the frequency at which I'm sending. One factor that can cause a problem is that the 4MHz oscillator shouldn't actually be exactly 4MHz to get exact frequency counter operation. It's some time since I did this, but there are details in the archive, and probably on the web site. -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] : Resonance
Don Wilhelm wrote: dipole. The fact is that a wire of any length can be made to take power at any frequency by feeding it with the conjugate of its feed impedance Although I agree with most of the preceding, the above statement hints at a common misunderstanding. In general, you do not want to feed an antenna from a source impedance that is the the complex conjugate of its impedance. Doing so guarantees that you cannot exceed 50% efficiency. Whilst such matching will give you the highest power for any given open circuit voltage, it will not give you the highest output power for a given input power. When one says is a transmitter is matched to 50 ohms, one actually means that its output network presents the optimum load to the finals when feeding a 50 ohm load. -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
Wayne is incorrect here - we will be requiring the return of the old KXV3 PC boards with the upgrade. 73, Eric WA6HHQ wayne burdick wrote: Your choice. 73, Wayne N6KR On May 18, 2009, at 1:14 PM, Joe Planisky wrote: Does the $40 upgrade for people who already have the old KXV3 require them to return the old KXV3, or will they be able to keep it for use in another K3, sell it, or whatever? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KPA-800 etc.
IMHO, taking the OEM route is Elecraft's best approach to meeting the demand for amplifiers and other products that are expensive to develop and bring to market. Elecraft is a small company with very limited capital and resources and new, RD intensive products are unlikely to be commercially viable. Assuming that there are approximately 4,000 K3 manufactured to date, my guesstimate is that 25% of the owners will purchase an amplifier. In other words, we are talking about 1,000 units at best; add another 100/year in future sales and the market size is still pretty small for a single-focus player. Should Electraft take the OEM route, SPE may not be the best OEM vendor as they appear to be focused on the ham-radio market. I would seek OEM arrangements with large manufacturers that do not depend much on amateur radio sales, such as Acom. From margins perspective, even small margins with no RD cost are much better than still relatively small margins, but with a significant RD cost. It's all about economies of scale and economies of scale are not Elecraft's forte. Speaking of RD and OEM, I also think there are great opportunities to apply the OEM concept to the K3 itself. For example, Alex VE3NEA (the guy who created CW Skimmer) has been working on a bleeding edge RTTY decoder that takes advantage of the power of modern DSP and CPU components; why not license his or any other kick-ass RTTY decoder to turn the K3 into the RTTY-er's choice? Or how about opening the firmware so that anyone can write for the K3? As brilliant the Elecrfat guys are, they are no match for the collective brain power of the community, not to mention their limited time. So my bet is that we will continue seeing minor additions to the K3 product line due to limited resources and capital. Rudy N2WQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K144XV
Great news about the K144XV! I just wonder if the K144XV has the possibility to separate the RX input and TX output and are separately available at the back panel? (A lot of VHF Dx-ers use only 1 relay, the one in top of the tower, where the preamp is installed as well.) 73's, Evert PA2KW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] WTB: BL2
Anyone want to part with yours? Phil Philip LaMarche LaMarche Enterprises, Inc. http://www.instantgourmetspices.com/ www.instantgourmetspices.com www.w9dvm.com http://www.w9dvm.com/ 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 K3 #1605 CCA 98 00827 W9DVM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K144XV
I am in the category of having the relay on top of the tower, so would like to know. Also the same question applies to the external Elecraft transverter! BTW, which of the two products has the edge in terms of clean output (if there is any difference at all)? 73, Erik K7TV - Original Message - From: Evert Bakker (PA2KW) ev...@pa2kw.com To: elecraft@mailman.qth.net Sent: Monday, May 18, 2009 2:27 PM Subject: [Elecraft] K144XV Great news about the K144XV! I just wonder if the K144XV has the possibility to separate the RX input and TX output and are separately available at the back panel? (A lot of VHF Dx-ers use only 1 relay, the one in top of the tower, where the preamp is installed as well.) 73's, Evert PA2KW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 etc.
Rudy, Great focused thoughts. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 K3 #1605 CCA 98 00827 W9DVM -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Rudy Bakalov Sent: Monday, May 18, 2009 5:23 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA-800 etc. IMHO, taking the OEM route is Elecraft's best approach to meeting the demand for amplifiers and other products that are expensive to develop and bring to market. Elecraft is a small company with very limited capital and resources and new, RD intensive products are unlikely to be commercially viable. Assuming that there are approximately 4,000 K3 manufactured to date, my guesstimate is that 25% of the owners will purchase an amplifier. In other words, we are talking about 1,000 units at best; add another 100/year in future sales and the market size is still pretty small for a single-focus player. Should Electraft take the OEM route, SPE may not be the best OEM vendor as they appear to be focused on the ham-radio market. I would seek OEM arrangements with large manufacturers that do not depend much on amateur radio sales, such as Acom. From margins perspective, even small margins with no RD cost are much better than still relatively small margins, but with a significant RD cost. It's all about economies of scale and economies of scale are not Elecraft's forte. Speaking of RD and OEM, I also think there are great opportunities to apply the OEM concept to the K3 itself. For example, Alex VE3NEA (the guy who created CW Skimmer) has been working on a bleeding edge RTTY decoder that takes advantage of the power of modern DSP and CPU components; why not license his or any other kick-ass RTTY decoder to turn the K3 into the RTTY-er's choice? Or how about opening the firmware so that anyone can write for the K3? As brilliant the Elecrfat guys are, they are no match for the collective brain power of the community, not to mention their limited time. So my bet is that we will continue seeing minor additions to the K3 product line due to limited resources and capital. Rudy N2WQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
How will that be achieved for those of us outside the US - what kind of shipment? -- It is of interest to note that while some dolphins are reported to have learned English -- up to fifty words used in correct context -- no human being has been reported to have learned dolphinese. -Carl Sagan, astronomer and writer (1934-1996) On 18 May 2009, at 22:22, Eric Swartz - WA6HHQ, Elecraft wrote: Wayne is incorrect here - we will be requiring the return of the old KXV3 PC boards with the upgrade. 73, Eric WA6HHQ wayne burdick wrote: Your choice. 73, Wayne N6KR On May 18, 2009, at 1:14 PM, Joe Planisky wrote: Does the $40 upgrade for people who already have the old KXV3 require them to return the old KXV3, or will they be able to keep it for use in another K3, sell it, or whatever? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
Heh. Smart. OK, would it be safe to assume the price of the new KXV3A (without a trade-in) will be in the neighborhood of $139? 73 -- Joe KB8AP On May 18, 2009, at 2:22 PM, Eric Swartz - WA6HHQ, Elecraft wrote: Wayne is incorrect here - we will be requiring the return of the old KXV3 PC boards with the upgrade. 73, Eric WA6HHQ wayne burdick wrote: Your choice. 73, Wayne N6KR On May 18, 2009, at 1:14 PM, Joe Planisky wrote: Does the $40 upgrade for people who already have the old KXV3 require them to return the old KXV3, or will they be able to keep it for use in another K3, sell it, or whatever? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 etc.
IMHO it seems that Elecraft has a unique formula for superior development work at lradically lower cost (just look at what they have done with so few people), and I don't think they want to bring that cost up to what other companies are paying. Telling them what they are not able to do doesn't seem like a good bet. 73, Erik K7TV - Original Message - From: Rudy Bakalov r_baka...@yahoo.com To: elecraft@mailman.qth.net Sent: Monday, May 18, 2009 2:23 PM Subject: [Elecraft] KPA-800 etc. IMHO, taking the OEM route is Elecraft's best approach to meeting the demand for amplifiers and other products that are expensive to develop and bring to market. Elecraft is a small company with very limited capital and resources and new, RD intensive products are unlikely to be commercially viable. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] OEM Elecraft products
But then, the products wouldn't be Elecraft (:-(( Ho-Hum 73! Ken Kopp - K0PP electaftcov...@rfwave.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KPA-800 KPA 1500
Elecraft, The only AMP that would interest me is something beyond and better than my Alpha 87A. That would be, by definition, a solid state 1500 watt output 160 to 6M amplifier integrated seamlessly with the K3 vie the 15 pin accessory plug. I would like to have the RF deck sitting at my operating position, assemble it myself and have the power supply out of sight. I would buy that amplifier the day it was announced. Roger K8RS K3 #280 and K3 #868, K2 #3478 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KPA-200
What would the K3 be like if one could order an optional plug in module to replace the 100W PA with a 200W PA? Just a thought...maybe I didn't get quite enough sleep Gary Sent via BlackBerry® from Telstra __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KPA-200
Snip That would be good for driving an amp to full power ! Portable operation would be improved given restrictions on battery and solar charging, notwithstanding a few less Llamas to truck around...:-) Gary Sent via BlackBerry® from Telstra __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 etc.
Erik, I would imagine that all of us on this reflector are here because we do believe that Elecraft products are superior and of great value. However, it is important to distinguish between price and cost as it is this difference (the margins) that fuel product development. Let's assume for a moment that Elecraft sells about 1500 K3s per year for an average price of $3,500. Let's also assume that the team makes a decent living in CA and each of the 4 members brings home about $125,000 per year. Right there we have a fixed labor cost of $500,000 per year or about 10% of sales. As you can see, not much is left if the overall company margins are in the 10-15% range, which is normal for low volume manufacturing.. Why do we care about all this? We do because it is important to understand how our desires and demands for features, products, etc. impact the bottom line and, based on that impact, the likelihood of them happening. So, do we want amps at the expense of superior core products performance? Is there a unique amp feature that existing products do not meet and therefore there is an opportunity for Elecraft? Can we live with an OEM product? These are some of the questions that are important to consider and naturally the answers will be different for each of us on the reflector. Elecraft is an amazing company that despite its size has truly changed the competitive landscape of the ham industry. Rudy N2WQ --- On Mon, 5/18/09, Erik N Basilier ebasil...@cox.net wrote: From: Erik N Basilier ebasil...@cox.net Subject: Re: [Elecraft] KPA-800 etc. To: Rudy Bakalov r_baka...@yahoo.com, elecraft@mailman.qth.net Date: Monday, May 18, 2009, 5:59 PM IMHO it seems that Elecraft has a unique formula for superior development work at lradically lower cost (just look at what they have done with so few people), and I don't think they want to bring that cost up to what other companies are paying. Telling them what they are not able to do doesn't seem like a good bet. 73, Erik K7TV - Original Message - From: Rudy Bakalov r_baka...@yahoo.com To: elecraft@mailman.qth.net Sent: Monday, May 18, 2009 2:23 PM Subject: [Elecraft] KPA-800 etc. IMHO, taking the OEM route is Elecraft's best approach to meeting the demand for amplifiers and other products that are expensive to develop and bring to market. Elecraft is a small company with very limited capital and resources and new, RD intensive products are unlikely to be commercially viable.. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-200
-Original Message- What would the K3 be like if one could order an optional plug in module to replace the 100W PA with a 200W PA? Just a thought...maybe I didn't get quite enough sleep Gary - IMX, it would be an undetectable change in signal strength under almost any conditions. Over the years most engineers working in HF radio systems have found that the minimum discernable change in a signal is about 3 dB (2:1 change in power) under ideal conditions. That's 3 times greater than the 'standard' for audio lab work, but what is found in practice given typical background noise, minimal QSB, etc. on an HF signal. You can test this on the air very easily. Just hook up with someone in a normal QSO and then cut your power in half and see if they notice any difference. Don't tell them what you're testing, just that you are making a change, and see if anyone can tell you what you changed. If they're looking at the S-meter on one of those absurd rigs that jumps 1 or 2 S-units for every 2 dB or so of signal change, they'll see something if you're close enough for a rock-solid signal, but they're not likely to hear it. I don't normally get excited about any major change that doesn't give me a 10:1 (10 dB) improvement in power. Now, let's not confuse that with having an efficient station. As any QRP enthusiast (or smart Ham at any power) will tell you, a dB here and a dB there eventually adds to a significant change in signal strength. But the cost/benefits ratio of doubling the power compared to the same ratio going to the legal limit usually makes such a small change a bad investment. Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
With the exception of 6m, you have essentially that capability available in the Tokyo Hy-Power HL-2.5KFX which, thanks to Elecraft's loan of a new K3 for the show (thanks again Eric!), was being demonstrated in the Array Solutions booth this weekend in Dayton. In addition, the Tokyo Hy-Power HL-1.5KFX gives you about 1k output on 160 through 10m, along with about 650w output on 6m - also with full integration with the K3 via the 15 pin ACC connector. 73, Bob Naumann W5OV Array Solutions -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Roger Sent: Monday, May 18, 2009 5:56 PM To: Elecraft Reflector Subject: [Elecraft] KPA-800 KPA 1500 Elecraft, The only AMP that would interest me is something beyond and better than my Alpha 87A. That would be, by definition, a solid state 1500 watt output 160 to 6M amplifier integrated seamlessly with the K3 vie the 15 pin accessory plug. I would like to have the RF deck sitting at my operating position, assemble it myself and have the power supply out of sight. I would buy that amplifier the day it was announced. Roger K8RS K3 #280 and K3 #868, K2 #3478 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-200
rfenab...@gmail.com wrote: What would the K3 be like if one could order an optional plug in module to replace the 100W PA with a 200W PA? Just a thought...maybe I didn't get quite enough sleep Gary Sent via BlackBerry® from Telstra __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html I also would love that, Garybut I don't think it is technically possible for them, at least that is what they told me at Dayton previously :-( VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj 2m DXCC #11/6m DXCC #815 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
My elephant would look like my 2000A but solid-state - The amp in the basement and have a Remote Control Unit in the shack. Yes, 160-6M. Don't care if it is a kit or not. I assume a switching supply like the KPA1500. I agree about being seamless with the K3. 73, N2TK, Tony -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Roger Sent: Monday, May 18, 2009 6:56 PM To: Elecraft Reflector Subject: [Elecraft] KPA-800 KPA 1500 Elecraft, The only AMP that would interest me is something beyond and better than my Alpha 87A. That would be, by definition, a solid state 1500 watt output 160 to 6M amplifier integrated seamlessly with the K3 vie the 15 pin accessory plug. I would like to have the RF deck sitting at my operating position, assemble it myself and have the power supply out of sight. I would buy that amplifier the day it was announced. Roger K8RS K3 #280 and K3 #868, K2 #3478 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
Yeah, but some of us want 6M too. My 2000A does everything I want from 160-10M - remoted, 1500W on RTTY. But no instant ON. So, it is ON lots of times when I don't use it - like sunrise on Topband. I think THP did a great packaging job with the 2.5. If it only had 6M. And could be remoted. Trying to get the heat out of the shack. Maybe wishful thinking. But the amp fund has been sitting with money in it for a few years :-) N2TK, Tony -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Robert Naumann Sent: Monday, May 18, 2009 7:34 PM To: 'Roger'; 'Elecraft Reflector' Subject: Re: [Elecraft] KPA-800 KPA 1500 With the exception of 6m, you have essentially that capability available in the Tokyo Hy-Power HL-2.5KFX which, thanks to Elecraft's loan of a new K3 for the show (thanks again Eric!), was being demonstrated in the Array Solutions booth this weekend in Dayton. In addition, the Tokyo Hy-Power HL-1.5KFX gives you about 1k output on 160 through 10m, along with about 650w output on 6m - also with full integration with the K3 via the 15 pin ACC connector. 73, Bob Naumann W5OV Array Solutions -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Roger Sent: Monday, May 18, 2009 5:56 PM To: Elecraft Reflector Subject: [Elecraft] KPA-800 KPA 1500 Elecraft, The only AMP that would interest me is something beyond and better than my Alpha 87A. That would be, by definition, a solid state 1500 watt output 160 to 6M amplifier integrated seamlessly with the K3 vie the 15 pin accessory plug. I would like to have the RF deck sitting at my operating position, assemble it myself and have the power supply out of sight. I would buy that amplifier the day it was announced. Roger K8RS K3 #280 and K3 #868, K2 #3478 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 etc.
Rudy, I think it is dangerous to reason based on assumptions about not only development costs but also overall margins and any other numbers that a company does not disclose. Making assumptions based on what is average simply doesn't account for the fact that every company is different from average. It is the kind of reasoning that the government engages in: destroying private enterprise by trying to replace the invisible hand with public beliefs. That said, I think it is fair and useful to vent about what features are meaningful to oneself as a user, what one would buy or not buy etc. I don't think there is anybody out there who can speak for all or even for the majority of hams, and I think the Aptos folks want to know what we want at the individual level. 73, Erik - Original Message - From: Rudy Bakalov To: elecraft@mailman.qth.net ; Erik N Basilier Sent: Monday, May 18, 2009 4:05 PM Subject: Re: [Elecraft] KPA-800 etc. Erik, I would imagine that all of us on this reflector are here because we do believe that Elecraft products are superior and of great value. However, it is important to distinguish between price and cost as it is this difference (the margins) that fuel product development. Let's assume for a moment that Elecraft sells about 1500 K3s per year for an average price of $3,500. Let's also assume that the team makes a decent living in CA and each of the 4 members brings home about $125,000 per year. Right there we have a fixed labor cost of $500,000 per year or about 10% of sales. As you can see, not much is left if the overall company margins are in the 10-15% range, which is normal for low volume manufacturing. Why do we care about all this? We do because it is important to understand how our desires and demands for features, products, etc. impact the bottom line and, based on that impact, the likelihood of them happening.. So, do we want amps at the expense of superior core products performance? Is there a unique amp feature that existing products do not meet and therefore there is an opportunity for Elecraft? Can we live with an OEM product? These are some of the questions that are important to consider and naturally the answers will be different for each of us on the reflector. Elecraft is an amazing company that despite its size has truly changed the competitive landscape of the ham industry. Rudy N2WQ --- On Mon, 5/18/09, Erik N Basilier ebasil...@cox.net wrote: From: Erik N Basilier ebasil...@cox.net Subject: Re: [Elecraft] KPA-800 etc. To: Rudy Bakalov r_baka...@yahoo.com, elecraft@mailman.qth.net Date: Monday, May 18, 2009, 5:59 PM IMHO it seems that Elecraft has a unique formula for superior development work at lradically lower cost (just look at what they have done with so few people), and I don't think they want to bring that cost up to what other companies are paying. Telling them what they are not able to do doesn't seem like a good bet. 73, Erik K7TV - Original Message - From: Rudy Bakalov r_baka...@yahoo.com To: elecraft@mailman.qth.net Sent: Monday, May 18, 2009 2:23 PM Subject: [Elecraft] KPA-800 etc. IMHO, taking the OEM route is Elecraft's best approach to meeting the demand for amplifiers and other products that are expensive to develop and bring to market. Elecraft is a small company with very limited capital and resources and new, RD intensive products are unlikely to be commercially viable. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] : Resonance
David, You are correct, this *is* a common point of misunderstanding. You referred to the driving source impedance in your statement, and I believe that is the source of the misunderstanding. What you say is true about the driving generator. Amplifiers are designed for some efficiency into some load - in our case, usually 50 ohms, and whatever the amplifier designer must do to make that happen is up to the designer. However, to obtain maximum power transfer *into* the antenna, the antenna and feedline must have an impedance that matches the output impedance of the amplifier - we all strive to match our antennas to a 50 ohm load (or an SWR of 1:1 based on a 50 ohm system). We typically adjust the parameters of an antenna system to have an input impedance of 50 +j0 ohms in order to obtain the maximum power into the antenna (because that the the load the amplifier needs to see for proper in-spec operation). To accomplish that, we might have a tuner of some nature between the transmitter and the input of the feedline. If the antenna feedline has an impedance of (for example) 120 +j30. then the matching network will have an input impedance of 50 +j0 and an output impedance of 120 - j30 -- that is as far as it goes. I stand on my statement (but will not extend it to the internals of amplifier design) - it is only related to feedline and antenna matching. Consider that if one builds a matched antenna system at some frequency as I described above and terminates it at the transmitter end with a 50 ohm pure resistive dummy load. Now split the feedline at any point and measure the impedance of both the open ends created by the split - you will measure an R+jX impedance in one direction and an R-jX impedance in the other direction - that is a conjugate match. If it is something other than that, there will be significant loss in the antenna system. Yes, if we put a theoretical (equivalent circuit) generator on that 50 ohm feedpoint, that theoretical generator must have an internal resistance of 50 +j0 ohms to achieve maximum power transfer between that theoretical generator and the antenna feed - and the power dissipated by that theoretical resistance on the theoretical generator will be the same as that delivered to the load. However, real amplifiers are not usually built the same way we create equivalent circuits. We do know that amplifier efficiencies can be much higher than 50%. When we replace the real amplifier with an equivalent circuit, that will contain a driving generator of zero loss and a series resistance of 50 ohms, but we never analyze the internals of an equivalent circuit, it is only the *representation* of the driving source which makes the system being analyzed behave as though the real generator (amplifier) were driving it. 73, Don W3FPR Although I agree with most of the preceding, the above statement hints at a common misunderstanding. In general, you do not want to feed an antenna from a source impedance that is the the complex conjugate of its impedance. Doing so guarantees that you cannot exceed 50% efficiency. Whilst such matching will give you the highest power for any given open circuit voltage, it will not give you the highest output power for a given input power. When one says is a transmitter is matched to 50 ohms, one actually means that its output network presents the optimum load to the finals when feeding a 50 ohm load. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
I think a lot of us are essentially in the same situation: We already have a good legal-limit amp covering 160 through 10, but we don't have anything similar for 6 or 2. It takes real commitment to pay essentially the same amount over again and get just one more band, and building is a lot of work too. Any manufacturer who can include 6m along with HF has a huge advantage IMHO, and including 2m would be fantastic. QEX had a design some years ago that covered both 6 and 2; that really got me interested. Alpha was supposed to pick it up as part of their product line, but I don't know if it ever happened. I think there are plenty of areas in the market that haven't become commoditized. 73, Erik K7TV - Original Message - From: N2TK tony@verizon.net To: 'Elecraft Reflector' elecraft@mailman.qth.net Sent: Monday, May 18, 2009 4:52 PM Subject: Re: [Elecraft] KPA-800 KPA 1500 Yeah, but some of us want 6M too. My 2000A does everything I want from 160-10M - remoted, 1500W on RTTY. But no instant ON. So, it is ON lots of times when I don't use it - like sunrise on Topband. I think THP did a great packaging job with the 2.5. If it only had 6M. And could be remoted. Trying to get the heat out of the shack. Maybe wishful thinking. But the amp fund has been sitting with money in it for a few years :-) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] K3_EZ AGC settings
The old computer I was using in the shack crashed so I'm moving everything to my laptop. I managed to save my log and most of the rest of what I had but lost all my K3_EZ stuff. I had found somewhere here on the list a post where someone had listed several different AGC settings for SSB and CW that he had entered into his K3_EZ and now I can't find it! Can anyone point me to it? TIA and 73 Bill NZ0T -- View this message in context: http://n2.nabble.com/K3_EZ-AGC-settings-tp2936738p2936738.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
I have the 1.5FX, indeed an excellent companion to the K3, and the physical interface is made to measure. Bryan, Zl1NI With the exception of 6m, you have essentially that capability available in the Tokyo Hy-Power HL-2.5KFX which, thanks to Elecraft's loan of a new K3 for the show (thanks again Eric!), was being demonstrated in the Array Solutions booth this weekend in Dayton. In addition, the Tokyo Hy-Power HL-1.5KFX gives you about 1k output on 160 through 10m, along with about 650w output on 6m - also with full integration with the K3 via the 15 pin ACC connector. 73, Bob Naumann W5OV Array Solutions 08:29:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KXV3 versus KXV3a
$109.95. Wayne N6KR On May 18, 2009, at 3:21 PM, Joe Planisky wrote: Heh. Smart. OK, would it be safe to assume the price of the new KXV3A (without a trade-in) will be in the neighborhood of $139? - www.elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
This is a great, healthy discussion that can help determine the need for an Elecraft branded amp. If we can't come up with a good set of features that are not met by current products, then perhaps it will be difficult to make the case there should be an Elecraft made amp. My dream product is a SO2R appliance that does all the RX/TX switching between 2 radios, including bandpass filters and remote antenna selection. 1500 W out, no time limit, RTTY included. Think of a 1500 W version of SPE, plus built-in W3NQN filters and Array Solution's SixPack. 2 inputs, 2 CATs, 2 PTTs, 6 or 10 remotely controlled outputs. Currently, there is not product that comes even close to such feature set. Rudy N2WQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] K3_EZ AGC settings
Here are my settings: AGC DCY nor AGC HLD 0.50 AGC PLS nor AGC SLP 010 AGC THR 005 AGC --F 150 AGC --S 020 SMTR readings somehow interact with AGC. Mine are: SMTR OF 027 SMTR SC 018 Ignacy NZ0T wrote: The old computer I was using in the shack crashed so I'm moving everything to my laptop. I managed to save my log and most of the rest of what I had but lost all my K3_EZ stuff. I had found somewhere here on the list a post where someone had listed several different AGC settings for SSB and CW that he had entered into his K3_EZ and now I can't find it! Can anyone point me to it? TIA and 73 Bill NZ0T -- View this message in context: http://n2.nabble.com/K3_EZ-AGC-settings-tp2936738p2936799.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
How about adding a built in tuner in the KPA-800/1500 that would work even when you ran 100 watts from the K2 or K3 with the amp in standby? Frank - W4NHJ - Original Message - From: Rudy Bakalov r_baka...@yahoo.com To: 'Elecraft Reflector' elecraft@mailman.qth.net Sent: Monday, May 18, 2009 9:06 PM Subject: Re: [Elecraft] KPA-800 KPA 1500 This is a great, healthy discussion that can help determine the need for an Elecraft branded amp. If we can't come up with a good set of features that are not met by current products, then perhaps it will be difficult to make the case there should be an Elecraft made amp. My dream product is a SO2R appliance that does all the RX/TX switching between 2 radios, including bandpass filters and remote antenna selection. 1500 W out, no time limit, RTTY included. Think of a 1500 W version of SPE, plus built-in W3NQN filters and Array Solution's SixPack. 2 inputs, 2 CATs, 2 PTTs, 6 or 10 remotely controlled outputs. Currently, there is not product that comes even close to such feature set. Rudy N2WQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Main Radio plays in Left External Speaker Only
How can I get the main receiver to play from both L R external computer speakers? The main receiver plays in only the left external computer speakers. Using firmware 3.11. K3 audio output is connected to the soundcard input. Soundcard output feeds both the computer and auxiliary speaker pairs. Computer plays stereo channels properly in both L R external speakers. Assuming that you are using LINE OUT, it puts the Main receiver on the left channel and the Sub receiver on the right channel, independent of any other settings. This is to allow computer software to do digital modes, for example, on each receiver. The assumption is that if you are feeding the LINE OUT to a computer, there is software for the computer that can do mixing, decoding, or whatever it is that you want to do. If you want the LINE OUT to mimic the PHONES jack, you need to set LINE =PHONES. But if you do this, the AF GAIN control will affect the level from LINE OUT, too. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
I ment to say auto tuner. Frank - Original Message - From: Frank Ross W4NHJ w4...@comcast.net To: 'Elecraft Reflector' elecraft@mailman.qth.net Sent: Monday, May 18, 2009 9:40 PM Subject: Re: [Elecraft] KPA-800 KPA 1500 How about adding a built in tuner in the KPA-800/1500 that would work even when you ran 100 watts from the K2 or K3 with the amp in standby? Frank - W4NHJ - Original Message - From: Rudy Bakalov r_baka...@yahoo.com To: 'Elecraft Reflector' elecraft@mailman.qth.net Sent: Monday, May 18, 2009 9:06 PM Subject: Re: [Elecraft] KPA-800 KPA 1500 This is a great, healthy discussion that can help determine the need for an Elecraft branded amp. If we can't come up with a good set of features that are not met by current products, then perhaps it will be difficult to make the case there should be an Elecraft made amp. My dream product is a SO2R appliance that does all the RX/TX switching between 2 radios, including bandpass filters and remote antenna selection. 1500 W out, no time limit, RTTY included. Think of a 1500 W version of SPE, plus built-in W3NQN filters and Array Solution's SixPack. 2 inputs, 2 CATs, 2 PTTs, 6 or 10 remotely controlled outputs. Currently, there is not product that comes even close to such feature set. Rudy N2WQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Help! Wierd bandswitching problem.
No Wayne, thank you! wayne burdick wrote: Now on my list-- tnx Wayne N6KR On May 15, 2009, at 6:54 PM, drewko wrote: Try the following. Assuming all your ham bands are mapped IN, except 5.0 MHz: Starting somewhere on the 40m CW band... FREQ-ENT 5.990 ENTER Move VFO to somewhere above 6.000 BAND-UP You end up on 30m (not in the 40m ham band as you would expect). Go to CONFIG BND MAP and use BAND-DOWN to select 7.0: It has been mapped OUT. --- http://www.elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://n2.nabble.com/Help%21-Wierd-bandswitching-problem.-tp2905475p2936942.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-200
I think it all depends upon how you operate. About two years ago I put together some audio files to determine how much difference a couple of db would make for readability, as at the time I was trying to decide between a couple of different antenna options. I generated some CW using CW Player, a free text-to-audio application, and then I mixed that with some 80m background noise I had recorded. I varied the relative signal-to-noise level in one db increments relative to to the noise until I got below the noise level. At the noise level, I had to work pretty hard to convince myself that I could hear the difference that one db would make. Two db was noticeable, but just barely. Three db was definitely noticeable and in my opinion could easily make the difference between making a weak signal DX contact or not. I think I still have the audio files around somewhere if anyone wants a copy. However, do I think it makes sense to jam a 200 watt amp into the K3? Nope. First off, I doubt it makes sense to double the heat dissipation inside such a small rig. Secondly, 3 db more power out doesn't have the same utility as three db from the antenna, where it also benefits reception (I did buy the more expensive antenna, by the way). Thirdly, my testing indicated that even at signals as low as only 10 db above the noise level, a 3 db difference was barely noticeable. If you feel the need to be heard, buy a real amp and give yourself a couple of S-units instead of a couple of db. 73, Dave AB7E Ron D'Eau Claire wrote: IMX, it would be an undetectable change in signal strength under almost any conditions. Over the years most engineers working in HF radio systems have found that the minimum discernable change in a signal is about 3 dB (2:1 change in power) under ideal conditions. That's 3 times greater than the 'standard' for audio lab work, but what is found in practice given typical background noise, minimal QSB, etc. on an HF signal. You can test this on the air very easily. Just hook up with someone in a normal QSO and then cut your power in half and see if they notice any difference. Don't tell them what you're testing, just that you are making a change, and see if anyone can tell you what you changed. If they're looking at the S-meter on one of those absurd rigs that jumps 1 or 2 S-units for every 2 dB or so of signal change, they'll see something if you're close enough for a rock-solid signal, but they're not likely to hear it. I don't normally get excited about any major change that doesn't give me a 10:1 (10 dB) improvement in power. Now, let's not confuse that with having an efficient station. As any QRP enthusiast (or smart Ham at any power) will tell you, a dB here and a dB there eventually adds to a significant change in signal strength. But the cost/benefits ratio of doubling the power compared to the same ratio going to the legal limit usually makes such a small change a bad investment. Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
Rudy, Just to clarify an apparent misunderstanding with the SPE amp, it is not a true SO2R device. What I mean is that the second radio can only listen to whatever antenna is attached to the SO2R connector. It does not get access to the transmit antennas which are connected to any of the 4 transmit antenna connections. So, while the SPE seems to be a great solution, it is a compromise at best, although quite clever. You also may want to check with K6VVA regarding its usefulness and viability in a contest situation. 73, Bob W5OV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Rudy Bakalov Sent: Monday, May 18, 2009 8:07 PM To: 'Elecraft Reflector' Subject: Re: [Elecraft] KPA-800 KPA 1500 This is a great, healthy discussion that can help determine the need for an Elecraft branded amp. If we can't come up with a good set of features that are not met by current products, then perhaps it will be difficult to make the case there should be an Elecraft made amp. My dream product is a SO2R appliance that does all the RX/TX switching between 2 radios, including bandpass filters and remote antenna selection. 1500 W out, no time limit, RTTY included. Think of a 1500 W version of SPE, plus built-in W3NQN filters and Array Solution's SixPack. 2 inputs, 2 CATs, 2 PTTs, 6 or 10 remotely controlled outputs. Currently, there is not product that comes even close to such feature set. Rudy N2WQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
Buy one of these.http://www.dishtronix.com/prometheus.html If I win the lottery it will be the amp of choice in the radio station on my privately owned island :-) Grant/NQ5T On May 18, 2009, at 5:56 PM, Roger wrote: That would be, by definition, a solid state 1500 watt output 160 to 6M amplifier integrated seamlessly with the K3 vie the 15 pin accessory plug. I would like to have the RF deck sitting at my operating position, assemble it myself and have the power supply out of sight. I would buy that amplifier the day it was announced. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
Bob, I think we are on the same page here; I fully understand the SPE limitations and that's why I say there is no product that fits my dream. I also missed to mention that such SO2R appliance must have the smarts of the microHam products in order the 2x6 matrix to have flexibility in a wide range of environments. So now I would add to the list the functionality of microHam's station master. --- On Mon, 5/18/09, Robert Naumann w...@w5ov.com wrote: From: Robert Naumann w...@w5ov.com Subject: RE: [Elecraft] KPA-800 KPA 1500 To: 'Rudy Bakalov' r_baka...@yahoo.com, 'Elecraft Reflector' elecraft@mailman.qth.net Date: Monday, May 18, 2009, 9:58 PM Rudy, Just to clarify an apparent misunderstanding with the SPE amp, it is not a true SO2R device. What I mean is that the second radio can only listen to whatever antenna is attached to the SO2R connector. It does not get access to the transmit antennas which are connected to any of the 4 transmit antenna connections. So, while the SPE seems to be a great solution, it is a compromise at best, although quite clever. You also may want to check with K6VVA regarding its usefulness and viability in a contest situation. 73, Bob W5OV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Rudy Bakalov Sent: Monday, May 18, 2009 8:07 PM To: 'Elecraft Reflector' Subject: Re: [Elecraft] KPA-800 KPA 1500 This is a great, healthy discussion that can help determine the need for an Elecraft branded amp. If we can't come up with a good set of features that are not met by current products, then perhaps it will be difficult to make the case there should be an Elecraft made amp. My dream product is a SO2R appliance that does all the RX/TX switching between 2 radios, including bandpass filters and remote antenna selection. 1500 W out, no time limit, RTTY included. Think of a 1500 W version of SPE, plus built-in W3NQN filters and Array Solution's SixPack. 2 inputs, 2 CATs, 2 PTTs, 6 or 10 remotely controlled outputs. Currently, there is not product that comes even close to such feature set. Rudy N2WQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:elecr...@mailman.qth..net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Knob covers
Sorry for the delay fellows.. Dayton!! And recovery!! I'll get back to all those requesting JPGs of the K3 main tuning knob with covers shortly. Lots of interest. 73, lynn W4NL __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-200
Actually Gary, KPA-200 sounds like a good idea. I like contesting and prefer low power. The problem is that different contests define low power as 100, 150 or 200 W. It would be nice to optimize low power for any given contest. BTW, I wonder if the KAT3 would also need to be replaced. 73, Fred __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-800 KPA 1500
That is exactly what is done in SPE 1K-FA amp plus SO2R and automatic antenna selection. The integration with my K3 is pretty simple too. SPE is working on 1500W version now and hope to show it at the end of this year or beginning the next year. 6m is also built in. 73, Igor UA9CDC How about adding a built in tuner in the KPA-800/1500 that would work even when you ran 100 watts from the K2 or K3 with the amp in standby? Frank - W4NHJ - Original Message - From: Rudy Bakalov r_baka...@yahoo.com To: 'Elecraft Reflector' elecraft@mailman.qth.net Sent: Monday, May 18, 2009 9:06 PM Subject: Re: [Elecraft] KPA-800 KPA 1500 This is a great, healthy discussion that can help determine the need for an Elecraft branded amp. If we can't come up with a good set of features that are not met by current products, then perhaps it will be difficult to make the case there should be an Elecraft made amp. My dream product is a SO2R appliance that does all the RX/TX switching between 2 radios, including bandpass filters and remote antenna selection. 1500 W out, no time limit, RTTY included. Think of a 1500 W version of SPE, plus built-in W3NQN filters and Array Solution's SixPack. 2 inputs, 2 CATs, 2 PTTs, 6 or 10 remotely controlled outputs. Currently, there is not product that comes even close to such feature set. Rudy N2WQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
