[Elecraft] R: K3S QST Article

Wayne, if IMD can be improved by reducing first amp power, 12-13 watt out to 10watt out, by a firmware modification, can‎ you  make this choice? I wouldnt like to make works on my new K3S... Ian IK4EWX Invio eseguito dallo smartphone BlackBerry 10.   Messaggio originale   Da: Wayne Burdick

Re: [Elecraft] Speakers - Optimal Frequency Range?

On Sun, 2016-10-16 at 20:47 -0800, Edward R Cole wrote: > As many of you know I suffer extreme hearing loss (especially high  > freqs), so Don's comment really hit home for me.  Several years ago I  > debated buying a home theater system with prof. speakers as I  > wondered if I could discern the

[Elecraft] Sold - K3-100

The K3-100 has been sold. I recently upgraded to a new K3S so I am selling my old K3-100. It is in excellent physical and working condition and from a non-smoking home. PayPal Preferred (no fee). Includes CONUS Shipping. The price is $2,100. Please contact me via w...@arrl.net

Re: [Elecraft] Speakers - Optimal Frequency Range?

On Sun, 2016-10-16 at 23:32 -0400, Don Wilhelm wrote: > Dave, > > While what you say (using the speaker as a filter) may have been  > advantageous in the days when receiver selectivity was "broad as a > barn  > door".  I don't think that applies today for receivers have adequate  > selectivity to

Re: [Elecraft] Speakers - Optimal Frequency Range?

As many of you know I suffer extreme hearing loss (especially high freqs), so Don's comment really hit home for me. Several years ago I debated buying a home theater system with prof. speakers as I wondered if I could discern the improvement. I found that having very linear response from

Re: [Elecraft] Speakers - Optimal Frequency Range?

It's been doing the rounds for years in one form or another. I remember trying one from a 70's or 80's ARRL H book. a 45 degree PVC pipe bend of suitable diameter, 3 or 4 inches. Suitably fixed to the top of the radio, blu-tak or whatever. Paint to match. Very useful to focus the sound. I'm

Re: [Elecraft] Speakers - Optimal Frequency Range?

Re:   "Back in the K2 days, many hams folded some stiff card or paper to make such a deflector to tape to the top of their rigs." That idea was highlighted again in May 2016 QST Hints & Kinks, pg 63. Mark, KE6BB __ Elecraft mailing

Re: [Elecraft] Speakers - Optimal Frequency Range?

Dave, While what you say (using the speaker as a filter) may have been advantageous in the days when receiver selectivity was "broad as a barn door". I don't think that applies today for receivers have adequate selectivity to do that filtering job. Some low end receivers that do not

Re: [Elecraft] Speakers - Optimal Frequency Range?

Take a stiff card, book or even your hand and hold it at a 45 degree angle behind the speaker and against the top of the K3 so the sound is bounced toward you and notice the difference. It's dramatic! Back in the K2 days, many hams folded some stiff card or paper to make such a deflector to tape

Re: [Elecraft] Speakers - Optimal Frequency Range?

Converting electrical power to mechanical power is fraught with peril. One way to get excellent performance from 300 to 3000 Hertz is to have very good performance from 30 to 30,000 Hertz. Or something like that. We want to be in the safely linear portion of the speaker. That said, I just

Re: [Elecraft] Power output per mode?

Fred OM, Don't have the KPA500, so that's moot. I agree that one problem is the lack of any indication of the power which will be produced. The only way I know of is to rotate the "power" knob - THEN the power indication shows, but not otherwise. Guess nothing is perfect, is it? George,

Re: [Elecraft] K3S QST Article

Knut, The K3S as originally shipped does not have a design flaw. Like virtually all 12-V-class transceivers using currently available MOSFETs, it was already right around -30 dBc or better, worst-case, for 3rd-order IMD. We simply found a way to make it better by a few dB, and we're offering

Re: [Elecraft] Speakers - Optimal Frequency Range?

On Sun, 2016-10-16 at 18:28 -0400, Don Wilhelm wrote: > Bret, > > In my opinion, a speaker should not "color" the audio response of the  > receiver. Au contraire, the speaker is as much a part of the radio as the synthesizer, or the APF is.  We are not dealing with a high end stereo here, (where

Re: [Elecraft] Speakers - Optimal Frequency Range?

The Hallicrafters bass reflex speaker cabinet for the SX-28 had fabulous flat response ... down to the deep bass if you drove it with that. It also employed a fairly large speaker and was big ... very big, and took a few watts [8 peak, I think] to drive it. In the late 50's, in college and

Re: [Elecraft] Speakers - Optimal Frequency Range?

300-3000 flat will work best... On Sun, 2016-10-16 at 15:02 -0700, MaverickNH wrote: > So aside from speakers that match the design of a transceiver, there > seems to > be some difference in philosophy about frequency range. Palstar touts > a > 55-8000 Hz range while the Phonema and Elecraft

Re: [Elecraft] Speakers - Optimal Frequency Range?

On 10/16/2016 6:28 PM, Don Wilhelm wrote: > IMHO, the best characteristic of a speaker is the flatness of its > response curve rather than its frequency range. A speaker with a flat > response will allow you to hear the transceiver "as it should be" > without distortion. So my vote is for

Re: [Elecraft] Power output per mode?

Well, technically it is saved per band per KPA500 state, if you have one. I'm pretty sure it isn't also saved per mode. I've never been at ease with memory functions that simply save the last state without leaving a message somewhere on the display what the current saved state is. When the

Re: [Elecraft] More like K3S vs K3s

Man, some of you guys need to get out and do something else. Try watching football. Or baseball. Or anything besides worrying about what an "S" really means. Jesus. On Sun, Oct 16, 2016 at 3:48 PM, Terry Schieler wrote: > Thanks to Phil W7OX who dug out Wayne's "official"

Re: [Elecraft] More like K3S vs K3s

Thanks to Phil W7OX who dug out Wayne's "official" email back when the capital S issue first arose: Wayne posted this message early in the K3S era: -- *List: elecraft Subject: Re: [Elecraft] K3s and K3S. From:

[Elecraft] Power output per mode?

I suspect that most of us like to reduce our power output on digital modes, so the continuous carrier doesn't overheat something. At present (as far as I can figure out) the power output setting is saved per band but not per mode, so that changing from CW to digital on the same band requires

[Elecraft] K3-100 For Sale

I recently upgraded to a new K3S so I am selling my old K3-100. It is in excellent physical and working condition and from a non-smoking home. PayPal Preferred (no fee). Includes CONUS Shipping. The price is $2,100. Please contact me via w...@arrl.net Thanks! Jim, W6KC K3-100 (Serial

Re: [Elecraft] M1 got screwed up

never mind figured it out... jim ab3cv On Sun, Oct 16, 2016 at 6:33 PM, Jim Miller wrote: > I normally my callsign in M1 for CW. However when I press M1 now I get > dropped into the Mic SEC menu. > > Any idea how to undo this assignment? > > I've poked around in the K3

[Elecraft] M1 got screwed up

I normally my callsign in M1 for CW. However when I press M1 now I get dropped into the Mic SEC menu. Any idea how to undo this assignment? I've poked around in the K3 utility and edited the CW memories to try to fix it with no luck. jim ab3cv

Re: [Elecraft] Speakers - Optimal Frequency Range?

That's why we use a CM500 On 10/16/2016 3:18 PM, Jim Brown wrote: What matters is smooth (flat) response from about 200 Hz to about 3 kHz as heard at the ear of the operator. The laws of physics dictate that uniformity of high frequency response is limited by diaphragm size -- the larger the

Re: [Elecraft] Speakers - Optimal Frequency Range?

Bret, In my opinion, a speaker should not "color" the audio response of the receiver. While it is true that there is not normally much response above 4000Hz from a ham transceiver, the speaker should not be the limiting factor. IMHO, the best characteristic of a speaker is the flatness of

Re: [Elecraft] Speakers - Optimal Frequency Range?

What matters is smooth (flat) response from about 200 Hz to about 3 kHz as heard at the ear of the operator. The laws of physics dictate that uniformity of high frequency response is limited by diaphragm size -- the larger the speaker, the worse it sounds off axis. The speaker built into the

[Elecraft] Speakers - Optimal Frequency Range?

So aside from speakers that match the design of a transceiver, there seems to be some difference in philosophy about frequency range. Palstar touts a 55-8000 Hz range while the Phonema and Elecraft speakers spec at 100-2 Hz. Palstar says sound above 8kHz is non-communication noise. So what's

Re: [Elecraft] Recording audio messages for N1MM+

Yes with latest firmware. Sent from my iPhone ...nr4c. bill > On Oct 16, 2016, at 11:28 AM, Jim Miller wrote: > > Does the K3S output the monitor audio to LineOUT to allow N1MM+ audio to > capture it for on the fly recording? > > Thanks > > jim ab3cv >

Re: [Elecraft] (K3) APF and selected bandwidth

I chase very weak CW signals on 160M 80M and 6M many of which Iwould not have been able to hear unless I turned on the APF feature. I have a 400kz filter as my narrowest CW filter and tune like this:     1) Zero beat exactly     2) Hold the XFIL/APF button    3) Narrow the width as far as it

[Elecraft] For Sale Items

National Radio NRM-2D Resonance Dip Meter, three coil set in Pelican Case, no manual. Virtually unused. $200 shipped CONUS. see http://www.nationalrf.com/national_rfdipmetter.htm K2 QRP CW rig. 160 through 10. Includes K160X, KNB2, KAF2, KIO2, KAT2 and KBT2 with a new battery. Plus spare parts. I

Re: [Elecraft] K3S QST Article

Bill, Another good solution is LiFePO4 batteries, which have a relatively flatter discharge curve than Lead-Acid, and that discharge curve is much closer to 13V for LiFePO4 than 11.5V for Lead Acid. Yes, they're more expensive to buy, but they last a lot longer. 73, Jim K9YC On

Re: [Elecraft] (K3) APF and selected bandwidth

I'm curious about others BW (width) setting on CW If weak, really weak using 20 to 15 hz Going narrower to 10 or 5hz setting doesn't seem to do much Really helps on weak 160 signals, generally APF off 73 Robert W5AJ -Original Message- From: Elecraft

[Elecraft] [PX3] Does not respond to the knob being rotated

My PX3 no longer responds to the knob being turned. The only indication I see when turning it is when the marker frequency is being displayed. When turning the knob, the displayed marker frequency bounces back and forth between something like 14.050.80 and 14.050.85. The PX3 is otherwise

Re: [Elecraft] Recording audio messages for N1MM+

There was a recent software update that removed the audio monitor from line out. the latest beta fixes that so it is backso normally yes it does when I use QSOrder with N1MM I hear both sides of the QSOI never had the update that broke the line out monitor if you have it I

[Elecraft] Recording audio messages for N1MM+

Does the K3S output the monitor audio to LineOUT to allow N1MM+ audio to capture it for on the fly recording? Thanks jim ab3cv __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] (K3) APF and selected bandwidth

Part of the problem with narrower bandwidths is making sure the signal is at the APF peak. I had fits trying to use APF with 200-400 Hz dialed in until I launched Spectrogram and made sure the signal peak aligned with the APF peak. Weak signals still show even when you have trouble hearing

Re: [Elecraft] Performance of the KX2 batt

Using the DISP voltage, using internal battery, receive is 11.7V and 10W in TUNE is 10.8V. a drop of 0.9V. The receive drop is a tenth or two, or round down to a 1V total voltage drop during 10W transmit. The minimum battery voltage would then be 11V or 3.67V per cell. Looking at representative

Re: [Elecraft] Performance of the KX2 batt

The Lithium family of battery chemistries all drop in voltage as battery capacity is used. At lower voltages, the KX2 IMD goes up, so the firmware reduces power output to maintain a clean signal. The choices seem to be: Keep going with 5W and enjoy QRP. Pack up the radio, go home, and

Re: [Elecraft] Performance of the KX2 batt

Dear OMs and YLs, I am not taking issue with what Howard is saying. My operations are different!The reason for entering this discussion is that the battery is being mentioned which I am more than pleased with for CW at 5 Watts. I have some observations and a question to finish with.

Re: [Elecraft] (K3) APF and selected bandwidth

I seem to recall a recommendation to use a 400 Hz bandwidth with APF. In my own exerience, narrowing DSP bandwidth much below this does not seem to help APF function and rather muddies it. Chip AE5KA On Sat, Oct 15, 2016 at 11:44 PM, Brian Hunt wrote: > On the other

Re: [Elecraft] Performance of the KX2 batt

The unloaded voltage of your pack, and the number of amp-hours used are consistent with each other, you are about half-way through the usable amp-hours of the battery, which has a 2.3 amp-hour rated capacity. Not sure exactly what to expect about the voltage drop under load, but I am not surprised

[Elecraft] Performance of the KX2 batt

I have been running my KX2 with the Elecraft supplied batt pack for the past two weeks and have a question for others using the same. I can run the KX2 at 10W only till I have used 1.12 AH of the batt capacity and its key up V=11.0 and key down is 10.3. At this time I can only run the KX2 at 5W.