Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

Also, you can move the "peak" left/right by rotating the SHIFT knob. You will see APF setting appear in the VFO B area and the ref point is denoted by an "*" next to 45. Sent from my iPhone ...nr4c. bill > On Feb 5, 2016, at 10:27 AM, David Kuechenmeister wrote: > >

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

The receiver has to be tuned precisely to the signal in question for APF to work. 73, Barry N1EU On Fri, Feb 5, 2016 at 9:53 AM, David Kuechenmeister wrote: > I tried this the other day with no success. That is, the weak signal that > was barely detectable, became so buried

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

one must also discover the artful use of the RF Gain control as well Adjustment of the RF gain control is not mentioned in Wayne's note on using APF. When I tried it here, the RF gain might have made some small difference but it still did not allow un-copyable signals to be copied. When

Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)

Thank, all. I may have to look into that. It may just involve changing out some runs of the cable. I used either CAT5 or CAT5e in all my runs. Just odd that the noise is coming from the one location and not the others, though. Ah well! -john NE4U On Fri, Feb 5, 2016 at 8:15 AM, David Ahrendts

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

I went from a TenTec Orion to my K3 ( whose box I opened almost the very day the K3S was announced which is total BS) and I really mis the SAF feature in the Orion. The APF in my K3 doesn't touch it. W5SUM Sent from Ronnie's IPhone > On Feb 5, 2016, at 09:56, dave wrote:

Re: [Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

My widest filter is 2.8MHz [the optional, 8-pole ssb filter]. Is the technique that Wayne is describing not applicable in my situation? ...robert On 02/04/2016 3:03 AM, Wayne Burdick wrote: Hi all, If you have... - really ugly noise sources that neither of the K3/K3S noise blankers

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

While I find the APF works really nice, one must also discover the artful use of the RF Gain control as well. Most hams seem to use excessive RF Gain which will force noise through the filter and all of those undesirable artifacts will be heard. If in doubt, reduce the RF Gain. Using this

Re: [Elecraft] Balun suggestions

On Fri,2/5/2016 5:06 AM, w7aqk wrote: I don't know what the precise definition for "balanced" will end up being (assuming we end up with a consensus), The laws of physics are not determined by consensus. I am citing the definition upon which IEC and AES Standards are based, which are

Re: [Elecraft] KX3: ALC on digital issue

I actually noticed the same thing too...the only difference was that I was transmitting Contestia 4/250. Jeff - kg7hdz > On Feb 5, 2016, at 08:36, Jim Rodenkirch wrote: > > Hey, guess what I found out.I saw the same thing while operating JT9/65. > > BUT, every

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

The technique I'm using with the APF also involves NR like so: On an uncrowded band, set the DSP BW to 700 to 1000 Hz. If you have a roofing filter in that range stay within it. Turn on NR set to mF5-3 or there about. The wide BW helps the NR work well. The "mix" mode lets a little

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

I tried this the other day with no success. That is, the weak signal that was barely detectable, became so buried in ringing that I couldn't detect it at all. I think I followed the procedure outlined in Wayne's email below... Noise was around S5 on 40m and the K3 was configured with APF active.

Re: [Elecraft] Balun suggestions

Correct on all points. On 2/5/2016 6:06 AM, w7aqk wrote: Jim B. and All, I don't know what the precise definition for "balanced" will end up being (assuming we end up with a consensus), but In Jim B's critique about what was said, I think he cut and pasted so as to erroneously attribute

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

I'd agree. My experience with APF is that it will indeed pop a signal that is already copyable, if a bit weak, out of the noise. Makes for easier copy. However the ringing is so bad on a really weak signal that it is of no help. I guess it depends on what you view as 'weak' and your noise

Re: [Elecraft] KX3: ALC on digital issue

Hey, guess what I found out.I saw the same thing while operating JT9/65. BUT, every time I rotated the pwr control knob, the ALC was exactly where I had adjusted it to, SO, I experimented a little and varied the pwr out prior to transmitting.guess what The power level

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

Thanks. I'll try again and be very careful this time. vy 73,Dave N4KD On Friday, February 5, 2016 10:08 AM, Barry N1EU wrote: The receiver has to be tuned precisely to the signal in question for APF to work. 73, Barry N1EU On Fri, Feb 5, 2016 at 9:53 AM, David

[Elecraft] re. K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

Thanks Wayne, the software blanking improvement on CW using FL1 13kHz filter set to 400Hz is remarkable because not only does it suppress strong electric fence pulses here for the first time in years but also cleans up the NB function when FL1 is enabled. I used the 13kHz filter because it was

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

I've seen it written that it helps to offset the IF slightly, although to be honest I have never myself got the APF to work to my satisfaction. Oddly, and I communicated with Wayne about this at the time, the first beta (I think) implementation of it was stunning, but a later release lost it for

Re: [Elecraft] re. K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

That answered a question I took off list, will my 12 KHz filter work, looks like I will be testing this... -- 73's, and thanks, Dave For software/hardware reviews see: http://www.nk7z.net For MixW support see: https://groups.yahoo.com/neo/groups/mixw/info For SSTV help see:

Re: [Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

Hi Wayne, On list report as you asked for... Set up as described, only using a 13KHz filter in F1 position...   Using a florescent light, which makes a rather ugly wide band noise, only on 18 MHz., I performed a sort of blind test   After doing the full setup as you described on a very

[Elecraft] wireless solution

One of K9YC's suggestions I took was to eliminate all unintentional cat 5 "antennas" in favor or wireless usb dongles. I went with linsys AE1200s which were on sale cheap from an Amazon partner. My only regret is that linksys, oddly, does not have linux drivers for this dongle. If you don't plan

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

Lightning has dramatic effect on the AGC system of many to most receivers. Rob Sherwood has had a lot to say about this. Elecraft has taken steps to minimize the effect. Yes different types of noise clearly have different characteristics and thus the reason for suggesting reducing the RF

Re: [Elecraft] Balun suggestions

DJ0IP must be one of, if not the post prolific testers of baluns and chokes *attached to aerials* ever. He does not measure them in the lab. His measurements are practical and done with rigour using modest equipment. He has done thousands of measurements for common mode current, only a fraction

Re: [Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

2.8 kHz should give some improvement over a narrow filter on some types of noise. Worth a try. Just temporarily tell the firmware that it's a little bit wider than your narrow filter, then use the WIDTH control to switch between narrow and wide. Re-optimize the NB settings each time. Wayne

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

In the last month of listening to really weak signals here in 9 land I've found it helpful but not radical. Just for fun I tried tuning some of the same VP8SGI signals on a Drake 2B/2BQ and found adding the 2BQ in the mix more user friendly and making a bigger difference, but hey, the 2B

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

I suspect that when the K3 APF was first engineered, the Yaesu FT-1000D APF (original hi-Q version) was used as the model because many prominent dx'ers/topbanders always raved about it. 73, Barry N1EU On Fri, Feb 5, 2016 at 12:37 PM, Scott via Elecraft < elecraft@mailman.qth.net> wrote: > > In

Re: [Elecraft] KX3: ALC on digital issue

meant to type, "...looks to me like the set power when you start transmitting in JY9/65 and, if you touch the pwr control knob after you start transmitting, the KX3 switches into a "display your ALC setting.just sayin' -- View this message in context:

Re: [Elecraft] KX3 beta firmware rev. 2.38: 15 Watts max output on 80-20 m, and PSK63 mode

After uploading the new firmware to my SN#01741 KX-3 yesterday, I tried to crank the power up to 15 watts on the dial, and found that 12 watts was as high as it would display on 40 meters. The unit was being powered by Pro Audio Engineering PAE-Kx33. Anyone else have this problem? Don, KI4D

[Elecraft] K3 - Most desirable form of AK3 to sell

I love my K3, nothing wrong with it in the least and it works exactly as I expect it to. It is fully loaded except for the 2M option. I have decided to buy a K3s, just because I like what Elecraft does and the K3s is their new page. So the decision I have to wrangle with is what to leave

[Elecraft] Upcoming Hamfest Booth Help

Elecraft will be attend the following two shows in February. If you are in either area and would like to help out in the booth anytime over the weekend just let me know. Any amount of time you are able to offer ( especially on Friday and Saturday) is welcome. You can reply to

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

Stephen is correct. Several of us lobbied for an APF feature shortly after the K3 debuted in 2007, drawing on our experiences with the FT-1000D. There /were/ two firmware versions that Wayne developed, and the consensus among some of us was that the first one was better than the second. As I

Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)

John, You changed power supplies. You changed cables. You changed No telling what "fixed" the issue. Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Ahrendts Sent: Friday, February 5, 2016 5:16 AM To:

Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)

John, I had a similar situation here with a LinkSys switch. Tried a NetGear switch and the birdies moved - but were still present. Solved the problem by moving all networked devices from cat5 10 mb to cat6 1000t gigabit ethernet. -larry (K8UT) -Original Message- From: John Shadle

Re: [Elecraft] K3S Computer Audio Question with Sub RX installed

To expand on Rich's comment: The comments thus far focus in the benefit of receiving two frequencies simultaneously. Another benefit for digital modes is being able to receive THE SAME signal (frequency) but through two antennas with two receivers, two digital programs (can be the same

Re: [Elecraft] KAT500 tuning problem

That was my first thought - so I laid out a new coax to the antenna. That said, this morning everything works just fine. I can only figure the KAT500 heard me say that it was leaving and it decided to work. Be interesting to see how long this holds. Bill W2BLC

[Elecraft] K3s transmit spike?

​Hi, J, VY1JA, is reporting that we have a transmit spike on our K3s which is driving the Alpha 9500 Grid current to excessive l​evels when initially transmitting. This is with the drive set to about 10w. I know there were problems a long time ago (circa 2009) with K3 power spikes, but I thought

[Elecraft] KX3: ALC on digital issue

I've followed the directions in Fred Cady's book and the steps in the fldigi manual for setting receive and transmit levels. (Use the 'tune' button in fldigi, adjust computer output to 4 bars on ALC meter, keep mic setting where I use for voice - 5) and all seems ok to this point. When I go to

[Elecraft] Wanted: KX3

> If you have one for sale please send details direct to n...@woh.rr.com > Will pay by PayPal. > Thanks > Tim > NZ8J __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm

Re: [Elecraft] Balun suggestions

Jim B. and All, I don't know what the precise definition for "balanced" will end up being (assuming we end up with a consensus), but In Jim B's critique about what was said, I think he cut and pasted so as to erroneously attribute comments made by Don, W3FPR, as being made by Wes N7WS. It's

Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)

If changing the cabling was the solution for your "birdies" then it would appear the issue was not with the switch hardware, but with poorly constructed cables. There are a LOT of CAT-5 and CAT-5e labels on cables out there that simply aren't. There's a list of specs involved, fairly lengthy

Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)

John, I’ll concur with Larry. I have several D-Link gigabit switches using CAT6 cable with no apparent noise, and I believe their “green” technology actually shuts off unused ports when not in use. Amazon. David A., KK6DA, LA > On Feb 5, 2016, at 1:48 AM, Larry Gauthier (K8UT)

Re: [Elecraft] KX3 IQ ADC and IQ DAC specification?

Hello John! The components used are shown in the KX3 schematics available on the Elecraft website. You can get whatever specifications your are interested in about those components from the manufacturer's data sheets. The sampling rate currently being used, subject (but unlikely) to change

Re: [Elecraft] Balun suggestions

Wes's point is that twin feeder is not automatically "balanced" - very far from it! Twin feeder happily supports both differential (equal and opposite, balanced) currents and common-mode current at the same time. So, in the real world, there is no such thing as "balanced" feedline unless YOU

Re: [Elecraft] KX3: ALC on digital issue

Jeff, Connect a dummy load rather than the antenna and try it at 10 watts. If the problem is not present, you can blame it on RF-in-the-shack being picked up by the audio input or your computer. If you do have an RF problem, the cure is in the antenna field. Better common mode chokes to keep

Re: [Elecraft] KX3: ALC on digital issue

Will do. Thanks Don. Jeff kg7hdz > On Feb 5, 2016, at 7:25 AM, Don Wilhelm wrote: > > Jeff, > > Connect a dummy load rather than the antenna and try it at 10 watts. If the > problem is not present, you can blame it on RF-in-the-shack being picked up > by the audio

Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3

I followed my interpretation of Wayne's instructions when trying to copy VP8SGI on 80M. I have an inverted V antenna with the peak at about 12 meters (44'). When I started, I could barely hear him. When I got the APF tuned in, I could hear him clearly, and actually managed to work him with

Re: [Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

I'm glad that noise solutions are being investigated. I think advances in NR/NB would be of more importance to many hams than close-in dynamic range, however useful the improvement in those attention-getting figures are. On a day to day basis noise is the top culprit for many of us. 73, Drew

Re: [Elecraft] Balun suggestions

Agreed. I thought I made that point clear. And it's not just common-mode currents. It all depends upon the load. A "dipole" antenna, for example, is seldom exactly the same distance from surrounding objects on each half, which will "unbalance" the load and so unbalance the currents on the feed

Re: [Elecraft] Balun suggestions

Maxwells' famous equations first published in the 1870's have proven to be extraordinarily accurate for all practical engineering purposes even after all of these years: http://www.aproged.pt/biblioteca/MaxwellII.pdf 73, Ron AC7AC -Original Message- It may come as a shock to some,

Re: [Elecraft] Balun suggestions

Gee, Wes. It's only basic RF engineering. If you'd care to be specific about any objection, please do so. I'll be glad to get into details on or off the reflector. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes (N7WS) Sent:

Re: [Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

Wayne, Second report using Horticultural lights as noise source. Each evening 40 lights up with grow lights, and the results with them are much different than the previous results, the grow lights are cut back to the point I can hear additional stations, but only if I use headphones... Did the