Re: [Elecraft] Keying CW in SSB Mode

Using audio tones in LSB or USB mode for CW is risky business. Any amount of over drive or excessive audio anywhere in the system, computer, software, radio and such WILL cause problems. Same for hum or distortion of the audio, specially if impacted by a wee bit of RF in the audio. I don't

Re: [Elecraft] Raspberry Pi, K2 and WSJT-X questions

While I run WSJT-X for JT-65 and JT-9, I use the radio to computer USB cable for communications and audio. Of course I'm running Windows 10. Everything works great and very simple to set up and operate. While your preference is Linux, seems you are making the issue much more complex than

Re: [Elecraft] K3S Shift Setting for WSJTX

Why split? The K3S should be in Data A mode and should switch to Data when you allow WSJT-X to connect. Typical bandwidth for receive is 2.4 kHz to 2.7 kHz.If you switch to JT-9 via the software then the radio should move up band 2 kHz. This is all configured in the Settings F2 menu

Re: [Elecraft] OT: 2017 Chevy Silverado 1500 power outlets

Yes! Seems the customer put a very large ring terminal on his radio ground wire. Then removed the battery cable at the battery, slipped the ring terminal over the negative post and then put the battery negative cable back in place. All was well until he took the car in for service. As

Re: [Elecraft] K3S USB audio output needs to be adjustable in Menu

I find Don's info to be exactly correct as it applies to the USB connection between the radio and computer.As to the Line IN and Line OUT on the back of the radioI've never used it. With Windows 10, if you wish the Sound Card to show the levels in dB, just right click on the level

Re: [Elecraft] OT: 2017 Chevy Silverado 1500 power outlets

My Silverado power outlets are always ON and are fused at 10 amps. 73 Bob, K4TAX On 6/26/2017 11:48 PM, Eugene Worth wrote: Does anyone know the amp rating of the two 12v power outlets in the Silverado 1500 for 2017? And, if you do know, is it switched (with the ignition) or always on?

Re: [Elecraft] ATU and Bandpass Filter

If one chooses to use band pass filters then one should anticipate using an external antenna tuner as well. This of course depends largely on the antenna and the impedance of the antenna at a given frequency.If one is using resonant antennas with a reasonably close 50 ohm impedance then

Re: [Elecraft] 6 meters open this morning; listening 50.095 (CW)

Yes, even my 160M center fed dipole {256 ft} with its balanced feed line and a 4:1 Guanella dual core current balun works quite nice on 6M. 73 Bob, K4TAX On 6/22/2017 2:48 PM, Wayne Burdick wrote: If you have a K3, K3S, or KX3, with the built-in auto tuner, then any antenna is a 6 m

Re: [Elecraft] K3S USB audio output needs to be adjustable in Menu

See the CONFIG Menu, LIN OUT to adjust level. Normal is 010. 73 Bob, K4TAX K3S S/N 10163 On 6/22/2017 12:31 PM, Dick via Elecraft wrote: Hello Elecraft, When feeding the audio from the K3S USB port to the CPU, the K3S audio level is extremely high and way too hot for good performance

Re: [Elecraft] A VALUABLE FIELD DAY ACCESSORY

Just order you needs from Amazon today or tomorrow and have it by Friday. I ordered my Koss SB 40 headset/mike on Friday and it was delivered Monday. No expedited shipping either. 73 Bob, K4TAX On 6/20/2017 6:05 PM, Clay Autery wrote: Guessing there's a really good chance that we'll

Re: [Elecraft] Using Heil Pro Set Elite boom mic on K3.. what adapter is required?

Plug the mike and phones into the respective jacks as marked on the rear and the foot switch into the PTT IN connector. The MENU under MIKE SEL will need to be changed as discussed earlier. Personally, as fantastic as the VOX works, I really enjoy using that feature. Of course using VOX

Re: [Elecraft] Using Heil Pro Set Elite boom mic on K3.. what adapter is required?

I use this configuration, headset with mike {Koss SB 40} and a separate desk boom and mike {PR781} along with a pair of external speakers. It is easy to switch between the two mikes with just a change from rP {SB 40} to fP {PR 781} via the menu. In both cases, I find mike gain selection

Re: [Elecraft] Packing Peanuts

Oh no, sticky goo forever. 73 Bob, K4TAX On 6/17/2017 3:44 PM, Rose wrote: Or hair spray ... 73 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] Packing Peanuts

Just spray the inside of the trash container with Fabric Softener. As to the ones in the box, same thing. Static gone. 73 Bob, K4TAX On 6/17/2017 3:20 PM, Dauer, Edward wrote: Just received a K2 kit via UPS -- my third in fact -- and spent 20 comical minutes trying to empty out the

Re: [Elecraft] Frustration with Elecraft

I'm not aware of any electronics company that doesn't, from time to time, sell and ship a product with faults. For what it's worth, that's why the company provides a warranty. Otherwise, no warranty would be needed if they are "perfect" 100% of the time. Won't happen! Seems some folks are

Re: [Elecraft] 6m off-frequency

You say RIT is not engaged, but what about XIT? Either of these being ON can cause an issue in this regard.Additionally, the way one person tunes to a SSB station may cause some frequency disparity between two stations. Excercise: with eyes closed, tune to a station and then look at

Re: [Elecraft] mic

On Jim's points, I fully agree. It seems hams are prone to over complicate a rather simple issue. There's more than adequate mike gain in the K3S, thus I find no technical reason for the use of an external preamp. The internal EQ of the K3S again is most adequate to correctly tailor

Re: [Elecraft] Preamps in K3s

I had to refer to the manual for this. Pre 1 is available for all bands and has 10 dB gain. Pre 2 is available for 12/10/6 M and has 20 dB gain. They are not stacked. Bob, K4TAX Sent from my iPhone > On Jun 10, 2017, at 9:48 AM, Jim Miller wrote: > > I'm confused a

Re: [Elecraft] {KX1} Antenna Matching Question

I've never been concerned about a SWR of 3:1 or less on HF. Even with a 3:1 SWR, depending on feed line loss, most of the power is reflected back to the antenna and is radiated. Now if the length of feedline has 3 dB of loss at the given frequency, then approximately 1/2 of the reflected

Re: [Elecraft] BL2 Balun Question

Your operation is similar to one I encounter when operating from our RV. A balun has several primary and in may cases mutiple functions. Some, all or none may be contained in the specific balun design: (a) operation between a balanced and an unbalanced circuit. Hence BalUn meaning balanced

Re: [Elecraft] K3s pre-purchase question

Based on your current operation and your present listing of equipment, I'd suggest the K3S-100. You have a tuner so no internal ATU unless you want the internal automatic convenience. You have a good mike, I use one of those myself. As to filters, the standard filter is most adequate and

Re: [Elecraft] K3S Microphones

I use a Heil PR 781 with great success. The K3S TX EQ is set as follows; -16 dB @ 50 Hz, -12 dB @ 100 Hz, -6 dB @ 200 Hz, and 2400 Hz @ +3 Db, 3200 Hz @ +6 dB. Working distance to the face of the mike is 4" to 5" on axis {one fist} so as not to enhance bottom end due to proximity effect,

Re: [Elecraft] data modes (USB/LSB or DATA) using KIO3B sound card interface

I have the K3S USB cable connected direct to one of the USB ports on the computer. As to radio set-up, see page 33 of the manual for details. I use DATA A mode for PSK & other data modes. The software is usually FLDIGI, HRD/DM780 or WSJT-X which all work under Windows 10 successfully and

Re: [Elecraft] 12 meter K3 RFI from nearby FM station

One other item, if available, try another brand/model radio using the same power supply, location, antenna and such. If it is present on that radio, most likely it is radiated. If it is not present, then most likely it is generated in the K3. {To which that is an entirely different can of

Re: [Elecraft] 12 meter K3 RFI from nearby FM station

I agree. Even better. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw K4TAX Sent: Wednesday, February 10, 2016 9:18 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] 12 meter K3 RFI from nearby FM station A

Re: [Elecraft] K1 test signal generator oscillator

Perhaps the 5 MHz rock is a third overtone cut. My experience, I've never been successful in getting a third overtone cut to oscillate on the fundamental frequency. 73 Bob, K4TAX On 2/11/2016 9:38 AM, zabarnick . wrote: I recently built the small test oscillator circuit shown in the K1

Re: [Elecraft] 12 meter K3 RFI from nearby FM station

I can't imagine 2 KW ERP FM directly causing that issue. In reading the original post, he was getting splatter on 12M which would indicate the antenna was connected. Nothing mentioned about the Preamp being on or off. Normally for 12M it is on, maybe PRE II is on as well. There are

Re: [Elecraft] K3: roofing filter configuration settings

Filter bandwidth is defined by two points either across the top or at the knee of the filter. If the knee is 250 Hz wide at the 3 dB points then measuring the 6 dB points may be 370 Hz wide. So without the position of the filter where the measurement takes place, the number relating to

Re: [Elecraft] 12 meter K3 RFI from nearby FM station

An electrical 1/4 wavelength of coax as an open stub at the FM frequency, connected using a T at the receiver input, will notch the FM TX signal. It won't attenuate other frequencies across the ham bands including 6M. Plus one can transmit with the stub arrangement in place. 73 Bob, K4TAX

Re: [Elecraft] Seeking loop Antenna Parts

One point to consider if running the antenna wire through a pulley. It will work back and forth in the wind and as trees move. The constant flexing will take its toll on the wire. A stranded wire with insulation I have found preferred and lives longer.Also, use large diameter pulleys to

Re: [Elecraft] Seeking loop Antenna Parts

Yes, with copper weld it is copper plated over steel. Once the copper gets pitted or scored, the elements can get to the steel core, it will rust, expand under the copper causing the copper to further shed and the steel will rust and break. If one must uses solid or stranded, hard drawn is

Re: [Elecraft] Balun Questions

Yes, insulation does in effect cause the electrical length to change. Case and point, construct a 1/2 wave antenna using insulated wire, put it up and determine the resonant frequency or point where the SWR is 1:1. Then take it down, carefully strip off the insulation and put it back in the

Re: [Elecraft] Slightly OT: non-resonant wires

I use a BOSCH laser tape obtained from the local hardware supply store. It measures to 250 ft, +/- 1/16". The only challenge is to estimate the wire sag in measuring a long length of wire. The laser is always measuring straight line. For shorter lengths, I stretch the wire tight on the

Re: [Elecraft] K3S Kit #10641

Congratulations on a successful project. 73 Bob, K4TAX K3S, s/n 10163 On 2/9/2016 1:40 PM, Jim Sheldon wrote: K3S Kit build Serial# 10641 arrived Monday about 9:00 a.m. Started the build around 10:30 and continued through yesterday with a few breaks. The build was complete except for the

Re: [Elecraft] Slightly OT: non-resonant wires

Start with a sailboat sitting in salt water with the electrical system and masts bonded and tied to suitable grounding plates on the hull. This is all normal for most shipboard installations. A random length of wire can be matched to effectively transfer RF from the transmitter. Precise

Re: [Elecraft] Balun Questions

I'm one of the other Bob's or Robert's Since the assembly of coax wound around a toroid doughnut style bobbin is typically not exposed to vibration, such as might exist in an airplane, boat or space vehicle, the use of a solid conductor coax such as RG-303 would not seem to be of

Re: [Elecraft] Balun Questions

t; For SSTV help see: > http://groups.yahoo.com/neo/groups/MM-SSTV/info > > > >> On Tue, 2016-02-09 at 09:01 -0600, Bob McGraw K4TAX wrote: >> I'm one of the other Bob's or Robert's >> >> Since the assembly of coax wound around a toroid doughnut style &g

Re: [Elecraft] I am officially a HAM!!!

wrote: >> Hi Bob McGraw, >> >> I agree, except on one point: I’s say 90%, rather than 75%, of the stuff we >> use and methods employed would put most of the station stuff in the trash. >> >> 73, >> >> >> Bob Nobis - N7RJN >> n7...@nobis.net

Re: [Elecraft] KX3 with KPA500

The book says "30 to 40 watts for 500 watts output". So if one has 1/2 of that for drive power {15 watts to 20 watts} then they can expect 1/2 of the rated output power {250 watts}. 73 Bob, K4TAX On 2/7/2016 10:03 AM, w4grj wrote: Can anyone advise power out of KPA500 using the KX3 as

Re: [Elecraft] K3S text decode and time

Depends on how DISP mode is selected. One position is VFO B and the other is: Time, Date, voltage, current, PA tempcontrolled by VFO B knob. 73 Bob, K4TAX K3S s/n 10163 On 2/7/2016 11:31 AM, Nr4c wrote: Should be VFO B frequency, not time. Sent from my iPhone ...nr4c. bill On

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

Yes, everything that radiates around your house and even outside your QTH for up to several miles will basically be additive to the noise floor. Take away the electricity from a couple of miles around and you'd be surprised how quite things become. As to fiber, I can't say our previous

Re: [Elecraft] Balun Questions

I am speaking of the radius of the coax bend. To have a coax bend radius of 3" the torroid would be huge...the size of a large coffee can. A 3" OD, x 1.5" ID torroid would typically have a winding radius of less than ~1", even with 2 stacked cores.For my "ugly balun" project I use

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

After reading all of this, I investigated my system here. First, no birdies found on any of the bands. WHEW! Noise on the 160M center fed wire w/balanced feed line is about S-3 this morning, noise on the coax fed 75M inverted V is S-2, and noise on the coax fed 40M inverted V is S-3, and

Re: [Elecraft] Balun Questions

I would have concern that long term usage of RG-8X, being foam core dielectric material and bent in a tight radius, may allow the center conductor to migrate to the inside radius of the bend. The Minimum Bend Radius for RG-8X is 2.50". Thus the tight bend will allow the center conductor

Re: [Elecraft] Balun Questions

Yep, good stuff. Be sure of your budget before buying a roll. It is a bit pricey. Handles legal limit HF power with a reasonable SWR. 73 Bob, K4TAX On 2/6/2016 7:10 PM, Robert Nobis wrote: I have used RG303/U for chokes. A bit smaller diameter than RG400 (0.170 versus 0.195 inches).

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] 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

As one that has personally used a balanced fed antennas for years, I suggest you review the info on this site. http://www.dj0ip.de/balun-stuff/ Good stuff on evaluating or building a proper balun. And for open wire fed antennas:

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

The purpose of a Noise Blanker is to act only on repetitive pulse type noise. They do little to nothing for random type noise issues. 73 Bob, K4TAX On 2/4/2016 5:29 PM, W5RDW wrote: I think the Collins NB was most effective on pulse type (ignition) noise encountered in mobile applications.

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

Tucker wrote: What, exactly, does the discussion of the Collins NB filter have to do with the experimental NB thing Wayne is working on? Can we stick to the topic at hand? On Thu, Feb 4, 2016 at 3:46 PM, Bob McGraw K4TAX <rmcg...@blomand.net> wrote: The purpose of a Noise Bla

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

I've found quite a number of articles discussing noise blankers and the implementation of such. From my experience with radios on the desk, past and present, the hardware noise blanker works quite well. On the other hand, DSP/software noise blankers have always been found to be marginal.

Re: [Elecraft] help with improving transmit eq

It just could be a mike issue that EQ won't correct. Otherwise, the values should show positive or + amounts starting with about 200 Hz. You might also check to see the previous owner had not set other values. 73 Bob, K4TAX K3S s/n 10163 On 2/3/2016 12:09 AM, Steve Wilson via Elecraft

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

As a new K3S owner {since last August}, I agree. The APF seems to lift signals out of the noise when otherwise, one would not know they are present. I've used it successfully many times on weak signal QSO's. Thanks for designing a great radio for the ham market. 73 Bob, K4TAX K3S, s/n

Re: [Elecraft] Noise from LEDs

Also, consider wrapping the PS in Aluminum Foil. That may provide some degree of shielding. On that point, I have two Direct TV receivers that were prone to changing channels, resetting, and such when I transmitted. This was proven to be the broad RF input for the RF remote control portion

Re: [Elecraft] Love me K3 line

As the price goes up, the market gets infinitely smaller.And quantity makes for profit. I would prefer to build one million $1.00 widgets as opposed to one $1,000,000 widget. 73 Bob, K4TAX On 2/1/2016 6:38 AM, Jim Bolit wrote: Would you be buyers at $10,000, $12,000, $14,000? People

Re: [Elecraft] Noise from LEDs

As Dave, NK7Z stated in part 2: "If I have a RF generating wall wart, it is best to remove it and replace it with one that does not generate RFI, not just put ferrite material on it." From this and your description, I would speculate the power supply is the guilty party that is creating the

Re: [Elecraft] MH2 vs MH3 mic question

The MH2 Hand Microphone is the result of a collaboration between Bob Heil of Heil Sound and Elecraft. The MH2 uses a high performance condenser element designed by Bob. It is optimally matched to the K2 and provides excellent SSB audio quality. MH2 Features: - - High output Heil microphone

Re: [Elecraft] KXAT100 "Hunting"

Candidly, I would be more concerned about exceeding the RF Exposure limits with this arrangement. Perhaps the "Tuner issue" is an indication of such. From your description, at 100 watts you will likely be way outside of the FCC limits of safe RF Exposure. Now with that said, the amount of

Re: [Elecraft] CW issue

Turn on the 15 db attenuator in the receiver or put a 20 dB attenuator in the line from your antenna to receiver. If the key clicks continue, it is a good bet they are being transmitted. If they go away, it is front end or mixer overload. On 1/29/2016 8:21 AM, Gmail wrote: I have a 6

Re: [Elecraft] K3S - Is there a way to send CW via USB computer and hear the sidetones?

In experimenting with HRD / DM780 this morning, I find the KY command does work as well. I"m sending from the keyboard and the computer is connected by the USB cable to the radio. The side tone from the radio does appear correct. 73 Bob, K4TAX On 1/28/2016 8:58 PM, Bob McGraw K4TAX

Re: [Elecraft] ESSB and the 6 kHz Filter

Using the K3 Utility, in checking the Filter Config list, while I do have the 6.0 kHz filter installed, I must select the 2.7 kHz or 2.8 kHz for CW and SSB transmit. Then from the CONFIG menu ESSB I can select up to 4.0 kHz bandwidth. Receive BW on AM will go to 5.0 kHz and on SSB 4.0 kHz.

Re: [Elecraft] K3S - Is there a way to send CW via USB computer and hear the sidetones?

I used HRD/DM780 in "KY mode" on a CW traffic net tonight. Worked great...uh, as well as HRD/DM780 works that is. Monitor level on the radio was set to 20 while using the external speakers. Side tone set to 800 Hz. 73 Bob, K4TAX K3S s/n 10163 On 1/29/2016 11:45 AM, Bob Mc

Re: [Elecraft] K3S - Is there a way to send CW via USB computer and hear the sidetones?

If one selects MCW in DM780 and Data A on the K3S, then the audio tone is heard as generated by HRD/DM780. 73 Bob, K4TAX K3S s/n 10163 On 1/28/2016 8:41 PM, Don Wilhelm wrote: Jer, AFAIK, the only way HRD/DM780 sends CW is in DATA A mode and sends audio tones to the transceiver. That

Re: [Elecraft] KPA500 in RTTY Contesting

The most destructive element to all solid state devices is. HEAT! The KPA500 seems well protected and will drop off line if the temperature exceeds a preset level. My only concern regarding pushing an amp like this or any other solid state amp to near rated values, same for near

Re: [Elecraft] KPA500 in RTTY Contesting

OOPS .. I forgot my Periodic table. Heat is not an element. But the same thing applies. 73 Bob, K4TAX On 1/27/2016 6:47 PM, Bob McGraw K4TAX wrote: The most destructive element to all solid state devices is. HEAT! The KPA500 seems well protected and will drop off line

Re: [Elecraft] K3-S - CW Keying for Contests

Regarding this point, to me the easiest way to run Data modes is to simply use the USB connection between the radio K3S and the computer USB port. No box, no USB to Serial adapter or other cables required. I use FLDIGI and it handles CAT control of the radio and data/audio. Set the CONFIG

Re: [Elecraft] Key out delay for end of TX?

One issue I'm trying to resolve is a manner to keep the KEY OUT active in between CW elements. This of course would negate QSK operation but the repeated clatter of an external relay is most annoying. Any help or suggestions? 73 Bob, K4TAX On 1/26/2016 9:15 AM, Jim Miller wrote: There is

Re: [Elecraft] Key out delay for end of TX?

to whatever you want by adjusting the DELAY (press hold SPEED MIC and turn knob to adjust). I believe that should produce the result you are seeking. 73, Ken K3IU ~~~ On 1/26/2016 10:21 AM, Bob McGraw K4TAX wrote: One issue I'm trying to resolve is a manner

Re: [Elecraft] Filtering RFI from LED & flouresence Dimmer Switches

If you choose to use incandescent lamps in the garage door opener, choose the "heavy duty vibration resistant" bulbs. These can also be found labeled as "ceiling fan" bulbs. Seems that they have 3 or 4 wires supporting the filament as opposed to only two wires for the standard bulb. 73

Re: [Elecraft] Faint clicking sound in headphones

I hear something which is very slight in QSK mode but not in SEMI mode. My observation is that it is "very" slight. Headphones with higher sensitivity may be more prone to exacerbate the the click. I speculate it is the leading edge AGC recovery in between CW elements. Being on a dummy

Re: [Elecraft] K3S and WSJT-X

I'll make screen shots if needed. Be sure you have CAT interface working and then the correct AUDIO CODEC selected in the application. The radio should be in Data mode. When you select TUNE you should hear the tone in the MONITOR, radio should switch to transmit, the PWR slider to the

Re: [Elecraft] K3S and WSJT-X

You might try running the K3S LINE Gain at a lower value, in my case 15 to 20, and running the PWR slider in WSJT-X a bit higher. This is also affected by the SPEAKER level in the Windows Sound controller panel. Also under "Enhancements" make sure "Disable All Enhancement" box is checked.

Re: [Elecraft] K3S and WSJT-X

- N7RJN n7...@nobis.net On Jan 25, 2016, at 18:51, Bob McGraw K4TAX <rmcg...@blomand.net> wrote: You might try running the K3S LINE Gain at a lower value, in my case 15 to 20, and running the PWR slider in WSJT-X a bit higher. This is also affected by the SPEAKER level in the Windows

Re: [Elecraft] Fwd: OT Mystery QRM Help (Video)

allenge to find and isolate. 73 Bob, K4TAX On 1/23/2016 4:29 PM, a...@sbcglobal.net wrote: Yes, but David says, "only occurs on 20M", so this may not hear it at 135MHz? Need portable like KX3 and small mag loop tuned to 20M. On Saturday, January 23, 2016 2:14 PM, Bob McGraw K4

Re: [Elecraft] Fwd: OT Mystery QRM Help (Video)

If one is serious about finding noise, I've found this item to go a long way in identifying down to the building or site from which it originates. It takes a bit of practice and time to triangulate but does work well. I'm sure there's other equipment and methods available as well.

Re: [Elecraft] Anti Static Bench

Places such as LOWE'S and HOME DEPOT carry stock counter tops. Usually in 4 ft, 6 ft, 8 ft and 10 ft lengths of several different colors. Standard depth including the back splash is about 25".I have used one for years. Choose a light solid color as it makes small parts easy to find.

Re: [Elecraft] K3 Compression compared to CESSB

Agreed. 73 Bob, K4TAX On 1/22/2016 2:13 PM, Al Lorona wrote: Okay, I see what you're looking at... I believe that's a plot of the output of a simulation, whereas in practice he's seeing about 2.5 dB [re: the original technical article in QEX Nov/Dec 2014]. Al W6LX

Re: [Elecraft] K3 Compression compared to CESSB

Re: QST February 2015, page 30, Figure 1 "Conventional SSB (blue) compared to CESSB (red) have the same PEP, but the average power of CESSB is 2.28 times greater." I amend my statement from 2.5 to 2.28. 73 Bob, K4TAX On 1/22/2016 1:47 PM, Al Lorona wrote: Slight correction: not a factor

Re: [Elecraft] K3 Compression compared to CESSB

OOPs that should be 2016 on the QST date. Sorry. 73 Bob, K4TAX On 1/22/2016 1:57 PM, Bob McGraw K4TAX wrote: Re: QST February 2015, page 30, Figure 1 "Conventional SSB (blue) compared to CESSB (red) have the same PEP, but the average power of CESSB is 2.28 times greater."

Re: [Elecraft] K3 Compression compared to CESSB

I have studied and measured both the Compression algorithm and, as a separate project, the ALC operation using my K3S. It is clear the ALC system is very different as implemented in the K3S from other radios in as much as there is some gain ranging which occurs below the 5th bar of ALC

Re: [Elecraft] K3 Compression compared to CESSB

Yes I agree. And I find the compression algorithm and ALC tables are really difficult to figure out from the outside world too. 73 Bob, K4TAX On 1/22/2016 7:35 PM, Kevin Stover wrote: I wouldn't expect there to be. Firmware is the holy grail of SDR and is really the only thing that

Re: [Elecraft] KPA500 finals blown

As applied to solid-state transmitters, ICAS does not imply reduced device life, as unlike vacuum tubes, the RF power devices are not regarded as consumables. Rather, ICAS in a solid-state environment implies de-rating to keep the device junction and case temperatures within their maximum

[Elecraft] CESSB Duty Cycle

The recent article in February QST describing the CESSB mode is of interest. Just wondering if that mode can or will be added to the code operating the K3S? Also, wondering if the higher duty cycle of the CESSB mode will exceed the ratings of the PA stage and that of the KPA500? From what

Re: [Elecraft] K3S USB intermittently disconnects when transmitting

Put a clamp-on ferrite with a turn or two through it and locate it at the USB port at the computer. Mine did that too, but only when using the amp on 160M. I figure it was a bit of RF being picked up on the cable. 73 Bob, K4TAX K3S s/n 10163 On 1/20/2016 7:44 AM, Jerry Moore wrote:

Re: [Elecraft] USB Soundcard

The SignaLink USB is one I find to be a good choice. It uses the USB port on the computer.There's others, more or less expensive. Like candy, it seems everyone has their preference in flavor. 73 Bob, K4TAX On 1/18/2016 9:20 PM, a45wg wrote: Please could anyone shed some light as to

Re: [Elecraft] OT antenna question

- From: "Bob McGraw K4TAX" <rmcg...@blomand.net> To: <wb5...@centurytel.net>; <elecraft@mailman.qth.net> Sent: Thursday, January 14, 2016 2:47 PM Subject: Re: [Elecraft] OT antenna question When I updated my 2 tuners, I used some doorknob style capacitors, of Russia

Re: [Elecraft] OT antenna question

work much better than the original disk ceramics units. 73 Bob, K4TAX On 1/14/2016 8:27 AM, Al Gulseth wrote: Bob, Are silver(ed)/dipped micas (CDE etc.) the preferred type for a tuner, or is there a superior newer technology available? TNX/73, Al On Wed January 13 2016 2:52:52 pm Bob McGraw K

Re: [Elecraft] Wide CW Signals

Depending on the radio they are using, some are really nasty! And with some that seem to run their radio in QSK mode, but without a QSK qualified amp, that makes things worse as they are likely arcing and sparking the relays. Nothing like a good old spark gap transmitter to eat up lots of

Re: [Elecraft] OT antenna question

words, turn it around to gain some advantage in the impedance matching game. Just be sure the balun can handle the voltages involved.This is a point for another long discussion. 73 Bob, K4TAX On 1/12/2016 10:58 PM, Joe Subich, W4TV wrote: On 1/12/2016 10:57 PM, Bob McGraw K4TAX wrote

[Elecraft] Starving" Fldigi for audio Rx

> > Be sure you have the correct audio interface selected in the FLDIGI Config > menu. Devices select Port Audio and the correct values in Capture & Playback > window > > Also set the FLDIGI Upper Signal level to -10 to -20 dB. And set the FLDIGI > Signal range to -60 to -90 dB. These are

Re: [Elecraft] Starving" Fldigi for audio Rx

I use FLDIGI with my K3S with excellent results. I can provide screen shots of the set-up if and as needed. 73 Bob, K4TAX K3S, s/n 10163 On 1/13/2016 3:02 PM, paul ecker via Elecraft wrote: In response to my question on the Win- Fldigi Reflector that I asked regarding waterfall adjustments

Re: [Elecraft] OT antenna question

If your tuner uses disk ceramic caps, as many do, these can be heating thus not being able to handle the RF current. They heat and cool and change value which in turn changes tuning. Replacing them with suitable RF current rated units is the solution. Bob, K4TAX Sent from my iPhone > On

Re: [Elecraft] K3S VFO-A Dial Knob

Plus the rubber rings are available in various colors. Unfortunately with the changes in the organization as Paul the Service Manager retired, things are running a bit slow in that department. Also it seems a previous owner sold almost everything including the paper rolls in the toilet.

Re: [Elecraft] K3S VFO-A Dial Knob

There is a "sa...@tentec.com" address and a "serv...@tentec.com" address. I presume those are there for those reasons. I spent all my spare money on my new K3S thus I have no need {translation: money} to order anything at present. 73 Bob K4TAX K3S s/n 10169 On 1/10/2016 11:41 AM, Phil

Re: [Elecraft] (K3) Low output power on 15 meters (new KYSN related ?)

I suppose "spec" would be about 1 dB or so. If so, then somewhere between 80 and 125 watts would be about right for a nominal 100 watt radio. I, however, didn't see and published spec for transmitter power in my K3S manual. 73 Bob, K4TAX On 1/9/2016 10:27 AM, Ken K3IU wrote: I have the

Re: [Elecraft] K3 - AFSK anamoly? No replies, try again

Seems strange to me. Don't or haven't noticed it with my K3S. I would think they perform about the same in this regard. 73 Bob, K4TAX On 1/6/2016 10:40 AM, Mike Murray wrote: I played a bit in the RTTY RU this weekend with my new-to-me K3 to learn the operation and iron out any kinks in my

Re: [Elecraft] Lightning Protection (was-Re: suggested PC???)

Two things I've found to be a big deterrent regarding lightning damage: (a) all driven grounds must be bonded back to the AC mains ground and this must be done outside of the house. I use some 1/2" flexible copper water line as my bonding conductor. It is trenched around the outside of the

Re: [Elecraft] Koss SB-45 Headset, update on comfort

One other point is many professional type condenser or like type mikes do have internal active amplification. They require a couple of miliamps of operating current as opposed to just placing a charge on the element. In this case it is normal for the mixing console to provide "phantom

Re: [Elecraft] suggested PC???

While everything in my shack is wireless...almost, I do have a USB cable between the laptop computer and K3S.What is the recommendation to make / convert the K3S port to wireless? 73 Bob K4TAX On 1/5/2016 7:14 PM, Gary K9GS wrote: When I rebuilt everything i went wireless with all of

Re: [Elecraft] suggested PC???

OK thanks. I'm wireless with both of the laptops, wireless to the printer, and to the house control systems. Just the radio connected via wire to the computer. 73 Bob, K4TAX On 1/5/2016 7:37 PM, Gary K9GS wrote: I probably should have worded that better. All of my COMPUTER connections

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