Re: [Elecraft] Sensitivity - Was K4 Observations

On Sun, May 19, 2019 at 12:06 PM Jim Brown wrote: > ... FT8 can work about 10 dB deeper into the noise than CW with good > radios and very good operators > on both ends. I've worked a lot of both modes. > > On 5/19/2019 6:50 AM, Wes wrote: > > FT8 reports negative SNRs number but we both know

Re: [Elecraft] Sensitivity

Eric, Can we end this meaningless thread? There are just numbers being spit out right and left that the majority of people reading just don’t care about or even really need to understand. 73, Dave N8AG Sent from Mail for Windows 10

Re: [Elecraft] K4 bandpass filters?

In the K4HD model, there are two crystal filters, one for CW and one for SSB. These radios are designed for strong nearby signals, as might occur on a DXpedition, where there are several stations operating on the same band. I wonder if the "SSB" filter is wide enough for running Fox/Hound

Re: [Elecraft] K4HD

K4HD is still an active license. If the transceiver is free to the holder of K4HD, it would be worth cancelling the license and applying for the variety callsign:) John KK9A wes_n7ws wrote: I was going to ask whether K4HD gets a free one, but he's an SK. Wes N7WS

Re: [Elecraft] KE7X, Fred Cady, silent key

Sorry to hear of Fred's passing. I will miss his direct and simple writing style. God bless Fred 73, Ron, K5HM k5hm@gmail.com www.qrz.com/db/k5hm     Excelsior! -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Todd Gahagan Sent: Friday, May 17, 2019

[Elecraft] Elecraft CW Net Report

Good Evening,    The difference between propagation on twenty and forty meters was amazing.  Normally one predicts the other but not today. Twenty was pretty good while forty was not.  Both bands had strong QSB.  I gave more than one report of S0 to S6.  There were a few thunderstorms but

Re: [Elecraft] no email

Well your 5NN here in Sparks NV.  The list has been extremely [OK, utterly extremely] with K4 chatter.  Possibly your email client is trashing them?  Oh wait, if it is, you won't get this.  Sorry 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 5/19/2019 3:26 PM, tony.kaz--- via

Re: [Elecraft] K4 integration with N1MMLogger Spectrum Scope

Don’t know, Barry. Elecraft can certainly adopt any such standard but no idea which or when. I suspect their plates will be full for quite a while.  Rick N6XI -- Rick Tavan > On May 19, 2019, at 8:51 PM, Barry LaZar wrote: > > Hmmm. And what about CW Skimmer which wants MME format I data?

Re: [Elecraft] K4 integration with N1MMLogger Spectrum Scope

Hmmm. And what about CW Skimmer which wants MME format I data? 73, Barry K3NDM On Sun, May 19, 2019 at 8:34 PM Rick Tavan wrote: > No, I believe there will be some integration required, probably inside MM. > > Rick N6XI > > -- > Rick Tavan > > > On May 16, 2019, at 11:24 PM, Lu Romero

Re: [Elecraft] K4 integration with N1MMLogger Spectrum Scope

No, I believe there will be some integration required, probably inside MM. Rick N6XI -- Rick Tavan > On May 16, 2019, at 11:24 PM, Lu Romero (portable) > wrote: > > Has Elecraft implemented the N1MMLogger Spectrum Display API natively in K4 > as opposed to via external wedgeware in the K3

Re: [Elecraft] KPA1500 AC Mains wire colours

Doug It's much the same situation here: no Elecraft distributor, so I'm also appreciative of direct factory shipping. But for the safety of all concerned, a clear explanation in the manual of the mains wiring connections in even a couple of the major jurisdictions is essential. My comment re

Re: [Elecraft] Sensitivity - Was K4 Observations

These techniques all end up using more bandwidth than a simple scheme, and the larger bandwidth itself increase the N in SNR. There is actually a theory for the case of idealised white noise and no other degradation (both of which are likely to be assumed in the cases previously discussed),

[Elecraft] K4 630m and 2200m TX?

What is expected power out of the K4 on these bands? Jim ab3cv __ 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

[Elecraft] K4 bandpass filters?

Eric mentions bandpass filters in his interview and the description of the K4D mentions a second set of those. I wonder how those are configured? Are they always active? Do they permit general coverage operation? Jim ab3cv __

Re: [Elecraft] no email

Go here http://mailman.qth.net/mailman/listinfo/elecraft. At the bottom of the page where it says unsubscribe or edit options fill in your email address and then click on unsubscribe or edit options. On the next page fill in your email and password(if you know it) and click on login. Then scroll

[Elecraft] no email

For some reason it has been a while since I received email on this reflector. Scratching my head on what to do to get email again. Not sure if I did something dumb to turn off getting email. Can't figure out how to get to a site that allows me to select delivery options. Tnx for any help.

Re: [Elecraft] KTCX03-1 high stability reference oscillator

More good info!! I went ahead and ordered the KTCX03-1 and the 2m transverter reference lock upgrade. From: Mike Harris via Elecraft Sent: Sunday, May 19, 2019 5:41 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KTCX03-1 high stability reference oscillator Yes, a 10MHz GPS locked

Re: [Elecraft] Sensitivity - Was K4 Observations

As Joe-W4TV nicely explained, digital modes excel due to occupying less bandwidth which also reduces noise bandwidth. There is some "high-tech" coding that adds to the overall sensitivity of the modes. CW eme operators are said to be able to reduce bandwidth "in their heads" to 50-Hz. When

Re: [Elecraft] KTCX03-1 high stability reference oscillator

Yes, a 10MHz GPS locked reference source. Or wait for about an hour from cold for the TXCO to stabilise. Calibration might be off, east to correct, but it will not be moving much. Regards, Mike VP8NO On 19/05/2019 18:02, HB wrote: Thanks Jim….Good feedback. Any other worthwhile mods to

Re: [Elecraft] Estimated date of availability of kit version of K4 ?

Eric said early next year in a video interview. On Sun, May 19, 2019 at 9:31 PM John Harper wrote: > 1 month after the K4 starts shipping? 6 months after...? > > Tnx/73, > > John AE5X > https://ae5x.blogspot.com > __ > Elecraft mailing

[Elecraft] Estimated date of availability of kit version of K4 ?

1 month after the K4 starts shipping? 6 months after...? Tnx/73, John AE5X https://ae5x.blogspot.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] KTCX03-1 high stability reference oscillator

Thanks Jim….Good feedback. Any other worthwhile mods to achieve stability? Hank K4HYJ From: Jim - N4ST Sent: Sunday, May 19, 2019 4:49 PM To: h...@optilink.us; elecraft@mailman.qth.net Subject: RE: [Elecraft] KTCX03-1 high stability reference oscillator Hank, From time to time I do meteor

Re: [Elecraft] KTCX03-1 high stability reference oscillator

Hank, >From time to time I do meteor scatter on 6M and being 200 Hz off with MSK-144 means you won't decode. While the standard oscillator should keep me within bounds when properly calibrated, I experienced problems. Installing a new KTCX03 cured my stability issues. This wouldn't be a problem

Re: [Elecraft] K4HD

I was going to ask whether K4HD gets a free one, but he's an SK. Wes  N7WS On 5/19/2019 11:46 AM, James Rogers wrote: Now that is a unique approach and sure covers all the bases. All the cries for a direct sampling radio with a touch screen have now been answered. But if you want a radio for

[Elecraft] Elecraft Announce K4 Software Defined Radio SDR at Hamvention 2019 - YouTube

Eric interviewed re: K4. Many questions answered. 73 - Steve WB6RSE > https://www.youtube.com/watch?v=LT6PGY5lOj4 > __ Elecraft mailing list Home:

[Elecraft] Receiver Test Data Inquisition

I looked at the Receiver Test Data from Sherwood Engineering. While it does show the FTsx101D (corrected) at the top of the list, there are other radios, models and brands, which show better numbers in other areas.   I'm not knocking any radio, I'm just saying;   "one best look at ALL the

Re: [Elecraft] K4HD

Yep, technology is sure fueling the competition for our $, desires and needs. Even the Kenwood TS-890 and Yaesu FTdx-101D are in there for nearly same price and features. Still my upgraded K3/500 is still doing well with my KX2/100 as my field/spare rig. I bought my K3 for both Field Day and

[Elecraft] K4 Black Box version

Lets hope they come up with a K4 remote version that can be placed close to antennas and controlled from your armchair with a tablet ( 11” iPad Pro would be cool) no knobs no mini-screen possibly way cheaper, and bigger screen for these old eyes. R Thorpe K6CG

Re: [Elecraft] KPA1500 AC Mains wire colours

Peter, I was okay because it was shipped directly from the factory.This ability to purchase direct is important to me.We do not have a dealer in EI and well the UK is leaving the EU. I just as soon purchase direct. I am sure the UK sellers include a UK power cable as

Re: [Elecraft] KPA1500 AC Mains wire colours

On 5/18/2019 4:28 PM, Clay Autery wrote: > 230VAC on 3 wires?  Never knew they did 3 wire 220V  I always > assumed it was still 2 hots and ground (plus an optional neutral). In distribution service 240V "single phase" is two "hots" (usually black/red)plus neutral (usually white), with a

[Elecraft] K4HD

Now that is a unique approach and sure covers all the bases. All the cries for a direct sampling radio with a touch screen have now been answered. But if you want a radio for contesting, dxpeditions, field day and the like you are encouraged to look at the K4HD which will have a dual superhet

[Elecraft] K4 ME

Boy, the new K4 is sexy. I said I'd never pay $5K for a radio before but I think it is time to change that policy. N1ESE __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] KTCX03-1 high stability reference oscillator

Hank, The real world difference is that you will see less change with temperature changes with the high stability TCXO. The phase noise improvement is provided with the new synthesizers and not with the TCXO. 73, Don W3FPR On 5/19/2019 1:35 PM, h...@optilink.us wrote: Hey Folks. In real

[Elecraft] read the comments

https://www.youtube.com/watch?v=TNdEfqNUX6k -- Ha nem vagy a megoldás része te vagy a probléma. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] Sensitivity - Was K4 Observations

There is one place that digital modes (like those by Joe Taylor and associates) can improve the decoded SNR beyond simply reducing the detection bandwidth. If the modulation/encoding supports N states but the encoding only uses M of those states, the decoding software can make use of the

Re: [Elecraft] KPA1500 AC Mains wire colours

On 5/19/2019 6:04 AM, hawley, charles j jr wrote: > BTW, I think if instead of saying "phases", it would be less > confusing to say two "legs" plus neutral for the single phase 240 vac > coming into the house. As an electrical engineer whose major was "power" (back when it was actually taught) I

[Elecraft] KTCX03-1 high stability reference oscillator

Hey Folks. In real world "seat-of-the-pants" experience, what difference if any would I see upgrading to the KTCX03-1? I eventually would add the reference kit to the internal 2 meter transverter. One thought was improvement for FT8 (and eventually FT4) on HF and MFSK on 2 meters. I have

Re: [Elecraft] Sensitivity - Was K4 Observations

Regarding W0YK/Ed’s comment – The 8-ary FSK of FT-8 may be buried in the ambient noise at my/your/somebody’s QTH. Like LPI communications, knowing where to look in frequency and time allows the decoder to combine noisy samples and recover the original; in the case of FT-8, a 63 bit message.

Re: [Elecraft] K4 effect on Used Gear Market

My wife tells me I am just renting the radios and not to worry the price. Does she have a sister? :-)) Just kidding I wouldn't trade my wife for anything! Steve kb1chu price. __ Elecraft mailing list Home:

Re: [Elecraft] Sensitivity - Was K4 Observations

On 5/19/2019 6:28 AM, Joe Subich, W4TV wrote: if the "effective" bandwidth for CW is on the order of 100 Hz a CW signal right at the noise in the 100 Hz "ear/brain filter" would be -14 dB in a 2500 Hz wide SSB filter. This estimate correlates well with my own that FT8 can work about 10 dB

[Elecraft] K4 effect on Used Gear Market

An excellent point! John AE5X https://ae5x.blogspot.com >My wife tells me I am just renting the radios and not to worry the >price. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] KPA1500 AC Mains wire colours

On 5/19/2019 6:04 AM, hawley, charles j jr wrote: I have in fact seen some home brew amplifiers wired with ground used as the neutral...and it was impossible to talk the owner out of it. There seems to be no cure for stupidity. 73, Jim K9YC

Re: [Elecraft] KPA1500 AC Mains wire colours

On 5/19/2019 6:04 AM, hawley, charles j jr wrote: BTW, I think if instead of saying "phases", it would be less confusing to say two "legs" plus neutral for the single phase 240 vac coming into the house. "Phase" is the word used in electrical codes (i.e., Law). 73, Jim K9YC

Re: [Elecraft] K4 Observations

John, Buck and all, Questions of that nature can likely be addressed better Tuesday after 8AM Pacific time. The developers will be back from Dayton by then and can respond with authority rather than guesses from those who have not measured those parameters. In the meantime, we have the

Re: [Elecraft] K4 effect on Used Gear Market

I do not worry the "reduction in value" of my radios. I figure that was my gained value in using the radio. I tend to ask 50% what what I paid when selling my excess good condition out of production radios and 75% of what I paid for still in production radios. My benefit is the use of the

[Elecraft] Fwd: K4 distortion

> The K4 will sample the output signal, feed it to the unused rcvr ADC and > develop a correction signal to the transmitter. There is a RF sample in port > that can be used to feed external sample to ADC. The transmitter monitor > option in the P3 moves into the K4. > ADC is separate small

Re: [Elecraft] K4 Observations

On 5/19/19 7:39 AM, David Woolley wrote: Unfortunately, the amateur radio world behaves like popular culture and hijacks engineering terms and redefines them.  Nearly every radio receiver nowadays is largely an SDR, but the amateur community tends to use the term in a more restricted sense.

Re: [Elecraft] Sensitivity - Was K4 Observations

We all now (i guess) that decoding below the noise floor needs: Time, timing and repetition.. no formulas needed . 73's, Evert PA2KW -Oorspronkelijk bericht- Van: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] Namens Joe Subich, W4TV Verzonden:

Re: [Elecraft] Sensitivity - Was K4 Observations

I've often wondered what the effective bandwidth of a good CW operator was. I've noticed that, unless there's QRM, reducing the receiver bandwidth really doesn't help, so the limit factor is the "processing". On the other hand, neither does slowing down below perhaps 15 wpm, as if the

[Elecraft] K4 effect on Used Gear Market

Thanks to all who are providing more info about the K4. Certainly whets the appetite. What the K4 does to the value of used K3 s, however, is highly speculative at this point. For one thing, their second-hand value will vary with how soon, if at all, Elecraft stops producing them, and there

Re: [Elecraft] Sensitivity - Was K4 Observations

More like a "feel good" detection SNR? I think fldigi uses a few bins either side of the signal to determine the noise in the SNR measurement. When I narrow my K3 IF bandwidth down to just the, say Olivia, bandwidth the SNR number climb up to 30 dB high as the filter cut the noise in the

Re: [Elecraft] K4 Observations

Unfortunately, the amateur radio world behaves like popular culture and hijacks engineering terms and redefines them. Nearly every radio receiver nowadays is largely an SDR, but the amateur community tends to use the term in a more restricted sense. What I think is meant by Full SDR is what,

Re: [Elecraft] Sensitivity - Was K4 Observations

On 2019-05-19 9:50 AM, Wes wrote: FT8 reports negative SNRs number but we both know those are bogus. All of the modes that quote negative SNRs are doing so by using SNR in a voice (2500 Hz) bandwidth *NOT* SNR in the detector bandwidth (bandwidth of the final filter whether than be a narrow IF

Re: [Elecraft] Possible option for the K4?

He never heard the gunshot. 73 Bob, K4TAX On 5/19/2019 8:50 AM, Joe wrote: May I suggest the K4-Spousal-01 option for the K-4? For an additional charge a $250 gift certificate would be included in the shipping box. The gift certificate would be made out to the spouse's name.  This gift

[Elecraft] Possible option for the K4?

May I suggest the K4-Spousal-01 option for the K-4? For an additional charge a $250 gift certificate would be included in the shipping box. The gift certificate would be made out to the spouse's name. This gift certificate would be good at any retail store. Upon receipt of the shipment, the

Re: [Elecraft] Sensitivity - Was K4 Observations

I feel like I'm gonna be slappin' a tar baby by responding. Since we are discussion HF radios, I was assuming HF.  I realize JT65(-HF) and JT9 have been used on HF, but the QSOs are hardly random. If your computer clock is off, sorry, no QSO.  FT8 reports negative SNRs number but we both know

Re: [Elecraft] Sensitivity - Was K4 Observations

Buck, New mode "hear below the noise" in a normal SSB bandwidth even though they may be as narrow as 16 to 50 Hz (in the case of JT9 and FT8). The largest part of the claimed -21 to -27 dB S/N threshold is based on the difference in noise bandwidth. The actual "filters" for each of the

Re: [Elecraft] KPA1500 AC Mains wire colours

For years certain appliances, stoves, clothes dryers, water heaters used 240 volts and the ground was used to supply the 120 volt items as required.    Current electrical code requires L1, L2, Neutral, and Ground thus 4 wires and not 3. In some ham amplifiers the fan ran off of the split

Re: [Elecraft] KPA1500 AC Mains wire colours

I have in fact seen some home brew amplifiers wired with ground used as the neutral...and it was impossible to talk the owner out of it. It has also appeared in some of the schematics in the literature over the decades. BTW, I think if instead of saying "phases", it would be less confusing to

Re: [Elecraft] Sensitivity - Was K4 Observations

JT65, JT9, FT8.73,Ed W0YK Original message From: Wes Date: 5/19/19 07:49 (GMT-06:00) To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Sensitivity - Was K4 Observations What current modes hear below the noise level?Wes  N7WSOn 5/19/2019 4:42 AM, Buck wrote:> Here's a

Re: [Elecraft] Sensitivity - Was K4 Observations

What current modes hear below the noise level? Wes  N7WS On 5/19/2019 4:42 AM, Buck wrote: Here's a question about sensitivity.  We used to say if you could hear the atmospheric noise, that was enough.  Time to reduce RF gain. New modes hear below the noise and DSP is getting better at

Re: [Elecraft] Sensitivity - Was K4 Observations

Here's a question about sensitivity. We used to say if you could hear the atmospheric noise, that was enough. Time to reduce RF gain. New modes hear below the noise and DSP is getting better at removing it. Does that mean our "old" wisdom is now wrong and sensitivity below the noise level

Re: [Elecraft] K4 Observations

Sorrily not but, knowing Elecraft and the excellent work they do, I am sure this radio will be outstanding. Buck, k4ia Honor Roll 8BDXCC EasyWayHamBooks.com On 5/19/2019 6:58 AM, John Stengrevics wrote: Buck, Did you happen to discuss: 1. Noise blanker improvement 2. Improvement in

Re: [Elecraft] K4 Observations

Buck, Did you happen to discuss: 1. Noise blanker improvement 2. Improvement in sensitivity Relative to the K3S? 73, John WA1EAZ > On May 18, 2019, at 11:09 PM, Buck wrote: > > The following is offered based on my observations and discussions at the > Elecraft booth. I am *not* an

Re: [Elecraft] K4 and Predistortion

Going back to the original question as for now it seems there is no concrete information available on "predistortion" with the K4. Maybe further information will materialize over the next weeks/months which could be a valid platform for discussions. 73 Roger, DL5RBW -Original

Re: [Elecraft] K4 and Predistortion

With EER a class C or D amplifier can deliver an IMD of at least -80 DB but with pre-distortion it could be even better. Sent from my iPad > On May 19, 2019, at 3:38 AM, Roger wrote: > > As pointed out "PreEmphasis/DeEmphasis" and "PreDistortion" are two > different things. So it is important

Re: [Elecraft] K4 and Predistortion

As pointed out "PreEmphasis/DeEmphasis" and "PreDistortion" are two different things. So it is important to keep this in mind. To describe the process a little bit better it the introduction of "DeDistortion" would help. While DeEmphasis was done at the receiver end DeDistortion is done at the