Re: [Elecraft] K3s SSB transmitting bandwidth?

2018-12-25 Thread Bob McGraw K4TAX
Just made a quick sweep of my K3S in DATA A mode, no EQ, No SP, and find that it will pass 70 Hz with little to no attenuation. On the high end it will pass 3000 Hz but greatly attenuates 3100 Hz.  This is done with the stock filter of 2.7 kHz. At this point in time, I don't have a suitable at

Re: [Elecraft] WHY NOT 700HZ FILTER FOR K3/K3S?

2018-12-23 Thread Bob McGraw K4TAX
Yes while true,  however the DSP doesn't take the place of or perform the function of a roofing filter. 73 Bob, K4TAX On 12/23/2018 11:13 AM, Roger D Johnson wrote: I can vary the selectivity from 2800 to 50 Hz with the width knob. 73, Roger __

Re: [Elecraft] WHY NOT 700HZ FILTER FOR K3/K3S?

2018-12-23 Thread Bob McGraw K4TAX
I find the 500 Hz 5 pole filter  works very satisfactory for this purpose. 73 Bob, K4TAX On 12/23/2018 6:54 AM, Victor Rosenthal 4X6GP wrote: __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http:/

Re: [Elecraft] OT: Need Recommendations for Powered Speaker for KX3 (WU6R)

2018-12-22 Thread Bob McGraw K4TAX
>> distortion, no RF even when driving the KPA500 with the KX3. >> >> >> Michael Blake >> k9...@mac.com <mailto:k9...@icloud.com> >> >> >> >> >> >> >>> On Dec 22, 2018, at 5:08 PM, Bob McGraw K4TAX wrote: >

Re: [Elecraft] OT: Need Recommendations for Powered Speaker for KX3 (WU6R)

2018-12-22 Thread Bob McGraw K4TAX
Sounds like RF getting into the audio amps of the speakers. May require ferrite beads with a couple of turns thorough the beads on the audio and power cables. Bob, K4TAX Sent from my iPhone > On Dec 22, 2018, at 3:59 PM, Mark Wheeler via Elecraft > wrote: > > While the K3S is in the shop

Re: [Elecraft] Tuners and spurious responses

2018-12-22 Thread Bob McGraw K4TAX
The Johnson Matchbox configuration is indeed a banpass filter meaning it attenuates both above and below the frequency to which it is tuned.    I use mine at Field Day to provide attenuation to stations operating both above and below the band being used.  The amount of attenuation does vary as

Re: [Elecraft] AM Broadcasting

2018-12-21 Thread Bob McGraw K4TAX
WOW!  12 towers.   I've only worked with a 3 tower directional array that was switched between 2 frequencies and 4 different patterns.   A small 100 KW shortwave transmitter and it too switched between the 2 frequencies.    Flip the switch and hope that the TX quenched as it should, all switche

Re: [Elecraft] k3 High Current Message on 10 meters

2018-12-19 Thread Bob McGraw K4TAX
signal all that much. Thanks and 73! Harv K2PI -Original Message----- From: Bob McGraw K4TAX [mailto:rmcg...@blomand.net] Sent: Wednesday, December 19, 2018 10:43 AM To: Gadget Lust Cc: donw...@embarqmail.com Subject: Re: [Elecraft] k3 High Current Message on 10 meters Harv: Per the manua

Re: [Elecraft] k3 High Current Message on 10 meters

2018-12-19 Thread Bob McGraw K4TAX
Check fans and cooling. Make sure airflow is not obstructed. Bob, K4TAX Sent from my iPhone > On Dec 19, 2018, at 8:53 AM, Gadget Lust wrote: > > Hi Don: > > Actually, my issue is only on 10M. It appears that as I transmit, current > consumption increases, and I get occasional high curren

Re: [Elecraft] wire for random wire antenna using kx3

2018-12-18 Thread Bob McGraw K4TAX
But usually they have only 2 or 3 switched frequencies. They also switch directions, sometimes on different frequencies. All of these conditions are known and networks are pre set for the required combination. Bob, K4TAX Sent from my iPhone > On Dec 18, 2018, at 12:35 PM, W2xj wrote: > >

Re: [Elecraft] wire for random wire antenna using kx3

2018-12-18 Thread Bob McGraw K4TAX
When the farmer plows up the ground field in the Spring!  Gr 73 Bob, K4TAX On 12/18/2018 12:00 PM, Lynn W. Taylor, WB6UUT wrote: How often does the match change at a well-engineered broadcast station? On 12/18/2018 9:47 AM, W2xj wrote: That’s why we have adjustable antenna tuners. Same

Re: [Elecraft] wire for random wire antenna using kx3

2018-12-17 Thread Bob McGraw K4TAX
Be sure the wire is LCOF copper.  The electrons are reported to move faster and with less resistance in that medium.  This makes your signal get to the DX station faster than anyone else .     HA HA HA Seriously folks,   to evaluate the insulation on the zip cord or speaker wire, my method is

Re: [Elecraft] K3 Suddenly Putting Out Only 25 watts at 100 watts indicated

2018-12-13 Thread Bob McGraw K4TAX
Someone suggested performing 2 tone tests.  Seems reasonable. I tried that with my K3S into a dummy load and an a RF sample fed to my RSP1 receiver using HDSDR  software.   I find that it does indeed display the IMD products from the 2 tones.  I now need to study the results a bit more to eval

Re: [Elecraft] [KAT500] Odd KAT500 Behavior

2018-12-13 Thread Bob McGraw K4TAX
Just went through the setup for WSPR on 160M - 6M for my station, K3S, KAT500, etc.    I have the KAT500 in MAN mode and it switches bands correctly.  I didn't see any issues at 5 watts transmit. Why is it re-tuning?   Are you operating the KAT500 in the AUTO mode?    Just go through each band

Re: [Elecraft] CW Decode and Preamp?

2018-12-12 Thread Bob McGraw K4TAX
I'd say initially that you aren't configuring the radio for the best decode.   Here's something I wrote some months earlier.   It might prove worthwhile in your case.  Of course not knowing what bands and your noise conditions is something you'll have to judge for yourself.  You may need to cha

Re: [Elecraft] KPA500 AC power

2018-12-12 Thread Bob McGraw K4TAX
Depends.   If you have a stiff 120 V service from the breaker panel, a service that doesn't loop through other outlets, specially the ones that use the push in the wire type connections, then the KPA500 will run OK on 120 volts.   If you have other stuff on that circuit,  or have the maximum le

Re: [Elecraft] Less Than Perfect Antennas [was Flumoxed]

2018-12-10 Thread Bob McGraw K4TAX
Before Eric steps in, let me say "let's end this discussion.  It has veered too far from the original posting". 73 Bob, K4TAX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.

[Elecraft] My recent and general posting

2018-12-10 Thread Bob McGraw K4TAX
I did not suggest a particular type balun as I do not know the specifics of the antenna system being used.   Thus based my recommendation to contact the company for a discussion with them.    I feel they are better qualified than any of us in this regard.   As to measuring one balun model and s

Re: [Elecraft] AM operation of the K line

2018-12-09 Thread Bob McGraw K4TAX
Yes true, however I don't suggest using the 13 kHz filter for AM transmit in view of transmit bandwidth considerations.    The 6 kHz filter is more appropriate and thus does limit the transmit bandwidth to the required limits of the regulations.  97.101(a) 73 Bob, K4TAX On 12/9/2018 7:15 PM

[Elecraft] Less Than Perfect Antennas [was Flumoxed]

2018-12-09 Thread Bob McGraw K4TAX
are not useful at HF until you wind multiple turns through them, but are often sold for use as a string of beads on coax. How many beads are in the 8232? Are they Fair-Rite #73? 73, Jim K9YC On 12/9/2018 5:33 AM, Bob McGraw K4TAX wrote: Balun Designs, both 1:1 and 4:1 for use with tuners.   

Re: [Elecraft] AM operation of the K line

2018-12-09 Thread Bob McGraw K4TAX
Sure, works great.  As configured for SSB switching to AM mode runs about 125 watts of carrier from the KPA500.   No different than operating SSB, just switch the K3S to AM.   Must have the 6 kHz filter installed. 73 Bob, K4TAX On 12/9/2018 4:03 PM, Michael Blake via Elecraft wrote: Anyone

Re: [Elecraft] KPA500 - No RF Amplification in Operate on 20M (WU6R - Mark)

2018-12-09 Thread Bob McGraw K4TAX
I trust you have the configuration set as displayed on page 5, Figure 1 of the KAT500 manual.  And that you have the K3S configured so as to have the VFO tracking set to ON.  See page 60 of the K3S manual under KAT3.   Select 1 to set to KAT500Y. I would also suggest that in AUTO mode you allo

Re: [Elecraft] OT: G5RV antenna

2018-12-09 Thread Bob McGraw K4TAX
From my experience, more folks should pay attention to the antenna and balun work done by DJ0IP.    They would likely have better performing antennas.  His work is proven on antennas and not text book or computer models, but indeed he provides real world results. 73 Bob, K4TAX On 12/9/2018

Re: [Elecraft] Less Than Perfect Antennas [was Flumoxed]

2018-12-09 Thread Bob McGraw K4TAX
Balun Designs, both 1:1 and 4:1 for use with tuners.I have both because I also have a folded dipole that I feed direct. I suggest you give the folks at Balun Designs a call and discuss your exact needs. Take their advice. Also see the DJ0IP site for details on baluns. Just Google DJ0IP.

Re: [Elecraft] Less Than Perfect Antennas [was Flumoxed]

2018-12-08 Thread Bob McGraw K4TAX
The 80 / 40 M fan dipole fed with 300 ohm transmitting line {The Wireman #562} and then use the balun at the point where the feed line enters the house would be preferable.   That configuration reduces the weight of the balun on the antenna.   From the balun to the station, use a good quality l

Re: [Elecraft] K3S K3 new firmware - how it doesnt download?

2018-12-08 Thread Bob McGraw K4TAX
You may wish to clear your Browser history.    It could be looking at the old site. 73 Bob, K4TAX On 12/8/2018 4:48 PM, IK4EWX wrote: Thanks Don. I will retry two-three days from now. 73, Ian IK4EWX -- Sent from: http://elecraft.365791.n2.nabble.com/ __

Re: [Elecraft] Less Than Perfect Antennas [was Flumoxed]

2018-12-07 Thread Bob McGraw K4TAX
While I agree with Jim's information, I would point out the flat dipole will have 3 dB more signal off of its broadside 0/180° as compared to that of a inverted V dipole off of its broadside.  At the same time, the inverted V dipole will have about 4.5 db more signal off of its ends 90/270° as

Re: [Elecraft] OT: [was Flumoxed]

2018-12-07 Thread Bob McGraw K4TAX
If a close match to 50 ohms is required, it is best to adjust the angle for lowest SWR while maintaining resonance by adjustment of the length. 73 Bob, K4TAX On 12/7/2018 7:42 PM, Brian Denley wrote: When I changed my 40 meter dipole from flat to inverted vee, I had to shorten the legs as t

Re: [Elecraft] Less Than Perfect Antennas [was Flumoxed]

2018-12-07 Thread Bob McGraw K4TAX
There  is really little to no difference other than the manner to which one is supported.    Otherwise, it is relatively easy to steer the quasi pattern of an Inverted V just by moving the ends around.  The dipole, well a bit more of a challenge to steer. Plus a dipole is the isotropic standard

Re: [Elecraft] bad audio at K4XU

2018-12-07 Thread Bob McGraw K4TAX
Good point Fred. Yes the voltage at the radio should be 13 to 14 volts under all conditions. Check power cables and connectors, visually, physically, and electrically. Bob, K4TAX Sent from my iPhone > On Dec 7, 2018, at 1:19 PM, Fred Jensen wrote: > > Is your power supply stable and at 14

Re: [Elecraft] bad audio at K4XU

2018-12-07 Thread Bob McGraw K4TAX
I suggest you use the K3 utility and run a full power calibration. This does require a known good 50 ohm dummy load. If the problem persists, then I suspect failure of the LPA and/or the KPA3 stages. Contact Elecraft support. Bob, K4TAX Sent from my iPhone > On Dec 7, 2018, at 1:02 PM, Dick

Re: [Elecraft] Bad tx audio.

2018-12-06 Thread Bob McGraw K4TAX
Define "crappy audio"? Distorted, thin, muffled, humm, buzz, noisy, scratchy, bassy ... Some could be radio adjustments, some could be component failure, some bad mike, some could be power supply, some could be power cables/connectors, and ? Bob, K4TAX Sent from my iPhone > On Dec

Re: [Elecraft] SSB Features of the KX2 & KX3 You May Have Overlooked...

2018-12-06 Thread Bob McGraw K4TAX
As to firmware updates, when doing a firmware update, also print out the release notes and insert them into your manual.   Now, you have an updated manual. 73 Bob, K4TAX On 12/6/2018 2:25 PM, K8TE wrote: Don makes an excellent point regarding new firmware release notes. Unlike other manufa

Re: [Elecraft] Less Than Perfect Antennas [was Flumoxed]

2018-12-06 Thread Bob McGraw K4TAX
For what appears to be a modest antenna installation, look at the obtained results  of KE4PT.   Where on QRZ.COM he writes; ""At home, my Icom706mkIIg pushes 100 W through a coax-coil + ferrite current choke to an AH-4 automatic tuner unit at the bottom of a 4.3 m tall, 14.6 m long dual elemen

Re: [Elecraft] OT: G5RV

2018-12-05 Thread Bob McGraw K4TAX
Yes it is amazing that many contacts can be made with a mediocre antenna. Many hams haven't been exposed to a really good performance antenna system. There is a big difference. Bob, K4TAX Sent from my iPhone > On Dec 5, 2018, at 8:25 PM, Rose wrote: > > I have a copy of the original art

Re: [Elecraft] 6m meteor scatter

2018-12-05 Thread Bob McGraw K4TAX
Use WSJT-X. Mode is MSK-144. Band is 6M. WSJT has the frequencies in the band table. 50.260 and 50.360 as I recall. If your station is configured for FT-8 and CAT control then you are ready to go. Bob, K4TAX Sent from my iPhone > On Dec 5, 2018, at 10:44 AM, Gordon LaPoint wrote: > > On

Re: [Elecraft] 6m meteor scatter

2018-12-05 Thread Bob McGraw K4TAX
Meteors can enter the atmosphere from just about any direction.    I generally point east to north to west, although any meteors entering to the south of me would also leave trails that reflect radio waves.    Depending on activity, very low at present, one should look for predominant showers

Re: [Elecraft] KAT500 antenna port grounding?

2018-12-04 Thread Bob McGraw K4TAX
The schematic shows a 1 Meg resistor to ground and a gas discharge device, SA1, SA2, SA3 on each antenna port.  Also when the unit is not powered, it defaults to ANT 1 in the Bypass mode. Any lightning protection for your station should be accomplished outside of the house BEFORE the feed line

Re: [Elecraft] K3S will not load or tune on 160 M/SOLVED

2018-12-04 Thread Bob McGraw K4TAX
As a rule for many reasons, if you do not use ANT 2 with an antenna connected then by all means, put a dummy load on it. Even a 10W or 20W rated load.    It will save you much grief, frustration, and likely your PA. 73 Bob, K4TAX On 12/3/2018 7:54 PM, HB wrote: Easy is good!!! From: K1dj

Re: [Elecraft] K3S will not load or tune on 160 M

2018-12-03 Thread Bob McGraw K4TAX
No special configurations.   Make sure you have the correct antenna ports selected via the K3S and the KAT500.   And since the dummy load shows a high SWR, I would first suspect the coax jumper out of the radio to what ever is next in line. 73 Bob, K4TAX On 12/3/2018 10:49 AM, Richard Hoffm

Re: [Elecraft] [K3] SWR - Numerical Indication

2018-12-02 Thread Bob McGraw K4TAX
What is VSWR? There are many misconceptions and myths about VSWR. To try to overcome some of these misconceptions and to try to provide an easy and understandable summary, Electronics Notes has developed a page describing what VSWR is and this is accompanied by an embedded video. The page and

Re: [Elecraft] Bose QC35 headphones impedance

2018-12-01 Thread Bob McGraw K4TAX
There is a High gain and a Low gain setting for audio. In the CONFIG menu as I recall. Bob, K4TAX Sent from my iPhone > On Dec 1, 2018, at 10:28 PM, Gary Smith wrote: > > My QC15 headsets bit the dust and Bose > gave me a great price on a new one with > exchange. The QC15 had a modular p

Re: [Elecraft] I am flummoxed about my antenna

2018-12-01 Thread Bob McGraw K4TAX
As you are dealing with an inverted L and  the lengths you are using are about 1/4 wave on 160M for the inverted L.   You should have some inductance in series at the feed point to bring it close to resonance on 160M.    Ground loss in the system will only add to radiation resistance and make t

Re: [Elecraft] External AMP

2018-12-01 Thread Bob McGraw K4TAX
The only thing the SB-230 needs to switch to transmit is to ground the center terminal of the RCA connector on the back. Now with the K3S you will need to provide an Amp Interface such as the Ameritron ARB-704.   The switching rating of the K3S Amp Key circuit is not rated for the voltage throu

Re: [Elecraft] SWR - Numerical Indication

2018-11-30 Thread Bob McGraw K4TAX
What happened to using a Simpson 260 or 270 or Triplet 603? Those are actually better for finding a peak or null, which in both cases are only relative.  If one works on HV amps as I do from time to time, you'll find the life of a DVM to be zap. 73 Bob, K4TAX On 11/30/2018 11:54 AM

Re: [Elecraft] KPA500 Fan Control

2018-11-30 Thread Bob McGraw K4TAX
John et al: With my KPA500 and SSB rag chews I keep the fan on NORMAL.   It does cycle on and up from time to time.   When operating digital modes at 400 to 500 watts, I set the fan to 1.  It still does move to higher speeds during transmissions as the TEMP gets to 60 degrees or so.  Then drop

Re: [Elecraft] KPA-1500 issues

2018-11-29 Thread Bob McGraw K4TAX
In checking my K3S into an antenna that presents a 2:1 SWR as indicated on my external Power/SWR meter, my KPA500 in STBY, and my KAT500 in bypass mode, it does deliver 100 watts.   Although, I prefer not to operate in that configuration if not necessary. I think in general we fret too much ov

[Elecraft] GROUNDING and BONDING

2018-11-28 Thread Bob McGraw K4TAX
The  book GROUNDING and BONDING for the Radio Amateur, by H. Ward Silver, N0AX is one of the most complete and concise publications on the topic.    It covers most all aspects of the topic specifically for ham radio applications.   Written in easy to understand language with pictures and drawin

Re: [Elecraft] Wish I had a KAT1500

2018-11-27 Thread Bob McGraw K4TAX
Sold new in 1988 for $995.  Used market today about $450 to $650 depending on condition.  Rated at 2KW with 10:1 SWR 1.8 MHz to 30 MHz. 73 Bob, K4TAX On 11/27/2018 7:21 PM, AB4IQ wrote: Ten Tec made the 253 automatic tuner and a friend of mine bought his in 1988 or so and still uses it daily

Re: [Elecraft] Wish I had a KAT1500

2018-11-27 Thread Bob McGraw K4TAX
From the KAT500 manual: 3 - 30 MHz 1000 W into 16 ohms to 150 ohms (3:1 SWR) 1.8 - 2 MHz 600 W into 10 ohms to 500 ohms(5:1 Low Impedance, 10:1 High Impedance SWR) 30 - 60 MHz 500 W into 5:1 SWR (10 ohms to 250 ohms)  "The cabling diagrams show how to use the KAT500 with any transceiver and

Re: [Elecraft] Data troubles

2018-11-19 Thread Bob McGraw K4TAX
, Bob McGraw K4TAX wrote: You should be operating in DATA A mode for AFSK as it is an audio data mode. 73 Bob, K4TAX On 11/19/2018 9:26 PM, Martin Sole wrote: Can anyone help with a quick DATA mode problem. I've always used AFSK but it seems to have stopped working on transmit. I ca

Re: [Elecraft] Data troubles

2018-11-19 Thread Bob McGraw K4TAX
You should be operating in DATA A mode for AFSK as it is an audio data mode. 73 Bob, K4TAX On 11/19/2018 9:26 PM, Martin Sole wrote: Can anyone help with a quick DATA mode problem. I've always used AFSK but it seems to have stopped working on transmit. I can set DATA A and then send audio

Re: [Elecraft] Killed the KPA500 :)

2018-11-19 Thread Bob McGraw K4TAX
This still confirms the KPA500 is a darn near bullet proof amplifier.   And likewise from the company, excellent support. Glad the issue was only minimal damage. 73 Bob, K4TAX On 11/19/2018 4:30 PM, Michael Walker wrote: Just an update on the repair Turns out that the first part of the 6M

Re: [Elecraft] KAT-500 auto-tuning issue with SSB vs. CW

2018-11-19 Thread Bob McGraw K4TAX
There are SWR parameters that can be changed in the KAT500 Utility.  I suggest you install this on your computer, connect the KAT500 and initiate the application. I have trained my KAT500 to use certain antennas on certain bands and for the lower frequencies, I have forced a tune ever 25 kHz.

Re: [Elecraft] Elec raft, will I ever own one ?

2018-11-16 Thread Bob McGraw K4TAX
Shucks, I waited 40 years to finally own a complete Collins S Line.  Then at age 74, and fully retired, I  purchased a complete Elecraft K Line.   Love it.  Now at age 76, I figure it will last me to my final QSO. 73 Bob, K4TAX On 11/16/2018 12:31 PM, Bob Nielsen, N7XY wrote: I bought my K3

Re: [Elecraft] K3 built in sound card and RF

2018-11-16 Thread Bob McGraw K4TAX
Probably you will need a good shielded USB cable and may need to add a clamp on ferrite choke on the cable close to the computer.    I went through 4 different brands of cables and types of USB cables before I found one that didn't have issues.   The one I ended up using does have "shielded" pr

[Elecraft] Leonid Meteor Shower

2018-11-16 Thread Bob McGraw K4TAX
Look for me various hours on 6M using MSK-144.  I'll be using my K3S and KPA500 to excite the 4 ele yagi. *THE LEONID METEOR SHOWER: *Earth is entering a stream of debris from Comet 55P/Tempel-Tuttle, source of the annual Leonid meteor shower. NASA cameras have already detected a number of Leo

Re: [Elecraft] Subject Re: Just a thought...

2018-11-16 Thread Bob McGraw K4TAX
NO MORE CONTESTSPLEASE! 73 Bob, K4TAX __ 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://w

Re: [Elecraft] Killed the KPA500 :)

2018-11-16 Thread Bob McGraw K4TAX
See manual page 19 PWR ON Also BAND CHG is the other parameter. Good luck with the repairs. Bob, K4TAX Sent from my iPhone > On Nov 16, 2018, at 8:56 AM, Michael Walker wrote: > > Thanks all > > I'll check the menu. I certainly don't remember it being there, but I will > have a 2nd loo

Re: [Elecraft] Killed the KPA500 :)

2018-11-16 Thread Bob McGraw K4TAX
You can configure the amp via the MENU to power up in the stand-by mode. Also have it go to stand-by when changing bands. You should have the amp connected to the K3 via the multi conductor cable and not use the amp key cable. The amp follows the radio and none of this will happen. Bob,

Re: [Elecraft] Possible K3s TX failure - distorted audio

2018-11-14 Thread Bob McGraw K4TAX
Pete et al: I purchased my K3S 100-F in August of 2015.    I experienced a failure in the form of distorted SSB audio in April 2018.  Working with the techs at Elecraft they suggested and supplied a new KPA3A.    That unit was received and installed and failed within a week.  They then sugges

Re: [Elecraft] OT: SPAM filtering ...

2018-11-09 Thread Bob McGraw K4TAX
What's spam?   I never see any using Greymail as my filter and none of the senders ever know they've been filtered.   I do check the contents on a regular basis and rarely, very rarely, do I ever find a message that should have passed through.  Best of all, it is easy to use and FREE. 73 Bob,

Re: [Elecraft] K2: KPA100 fan issue + current question

2018-11-09 Thread Bob McGraw K4TAX
: Don Wilhelm Sent: Nov 9, 2018 11:37 AM To: Jim KO5V , Bob McGraw K4TAX , Elecraft List Subject: Re: [Elecraft] K2: KPA100 fan issue + current question Jim, That 11 amps would sound more reasonable to me if you can say that the base K2 is being powered separately, but I would expect something c

Re: [Elecraft] K2: KPA100 fan issue + current question

2018-11-09 Thread Bob McGraw K4TAX
At 13.8 volts, 11amps is about 152 watts input. 100/152 = .658 * 100 for about 66% efficiency. All in all , looks about right to me. AKA - I wouldn't be concerned. Bob, K4TAX Sent from my iPhone > On Nov 9, 2018, at 10:46 AM, Jim KO5V wrote: > > Well, after checking that all of the com

Re: [Elecraft] K3 + SDRPlay's RSP1 as panadaptor

2018-11-08 Thread Bob McGraw K4TAX
tures.  As to how they interface with various logging applications, I don't have a clue. Glad to be of assistance. 73 Bob, K4TAX On 11/8/2018 2:44 PM, Doug wrote: Thanks for the idea. Works great and got me away from the problems using the IF out. 73 Doug N3QW On 11/8/2018 10:53 AM,

Re: [Elecraft] K3 + SDRPlay's RSP1 as panadaptor

2018-11-08 Thread Bob McGraw K4TAX
If it will tune to the IF frequency of about 8.2 MHz.  From experience, without an up conversion added, they won't tune that low. 73 Bob, K4TAX On 11/8/2018 9:57 AM, WW3S wrote: Can you use one of the less expensive sdr dongles in a similar way? Sent from my iPad On Nov 8, 2018, at 10:19

Re: [Elecraft] K3 + SDRPlay's RSP1 as panadaptor

2018-11-08 Thread Bob McGraw K4TAX
I used HDSDR software and a BNC T  and a couple of short coax jumpers from the RX ANT output back into the RX input.   Activate the feature from the front panel of the K3S.    The input impedance of the RSP-1  SDR is well above 50 ohms and thus I didn't observe any loading or loss of the receiv

Re: [Elecraft] KPA1500 firmware version 01.87 and K3S/K3 MCU version 05.64 are now in production

2018-11-07 Thread Bob McGraw K4TAX
Thanks Eric -   The system integration is really super.  Updates are so easy and solid. Thanks 73 Bob, K4TAX On 11/7/2018 7:18 PM, Eric Swartz - WA6HHQ, Elecraft wrote: We’ve just released KPA1500 firmware version 01.87 to production and is available for download.  We recommend everyone upd

Re: [Elecraft] Dual Ptt

2018-11-07 Thread Bob McGraw K4TAX
Excellent point Bob.   I'd not thought about that approach. Thanks 73 Bob, K4TAX On 11/7/2018 5:01 PM, Bob Wilson, N6TV wrote: On Mon, Nov 5, 2018 at 12:32 PM Bob McGraw K4TAX wrote: I basically do the same with different radios. The K3S is connected to the KAT500 and then throug

Re: [Elecraft] Re KX3 booster

2018-11-07 Thread Bob McGraw K4TAX
My comment and understanding on "FCC Certified".    The FCC now allows companies to perform "self certification".   In other words, they allow the fox to watch the hen house.    The companies can elect to do the testing and submit the results to the FCC. Thus the FCC does not actually test prod

Re: [Elecraft] KPA500 hum; horrendous

2018-11-07 Thread Bob McGraw K4TAX
Zero hum from mine.  From other comments, be sure the power transformer is correctly installed and secured.  It may have moved during transportation if you purchased a factory built unit. As to 20 watts drive and 350 watts out, what bands?    With 20 watts drive from my K3S I see 450 to 550 wa

Re: [Elecraft] Dual Ptt

2018-11-06 Thread Bob McGraw K4TAX
ly built, but there are several SO2R > boxes that will accomplish the same thing. > > 73, > Don W3FPR > >> On 11/5/2018 3:30 PM, Bob McGraw K4TAX wrote: >> I basically do the same with different radios. The K3S is connected to the >> KAT500 and then through

Re: [Elecraft] KX3 booster

2018-11-05 Thread Bob McGraw K4TAX
The model that DXE is selling is a VHF amp.  Note the disclaimer for the HF model -  RM Italy KL 405v HF Linear Amplifier with Fan "Export Only: This Model is not for sale in US, we only ship to the address outside of US." Needless to say, I would not run my call through one of these amps.   

Re: [Elecraft] Dual Ptt

2018-11-05 Thread Bob McGraw K4TAX
I basically do the same with different radios.   The K3S is connected to the KAT500 and then through the KPAK3AUX cable to the KPA500.   The other radio has a Amp Key output basically an open collector to ground which I connect to the PA Key input.   Either radio will key the KPA500 and no swit

Re: [Elecraft] Avoiding costly lightning damage to your radios gear

2018-10-30 Thread Bob McGraw K4TAX
If one used a KAT500, as I do, it has static bleed resistors on all antenna inputs. Bob, K4TAX Sent from my iPhone > On Oct 30, 2018, at 2:50 PM, Fred Jensen wrote: > > Does my K3 have a static bleed across the antenna terminal(s)? A number of > years ago, our CQP team in Alpine County f

Re: [Elecraft] Avoiding costly lightning damage to your radios gear

2018-10-30 Thread Bob McGraw K4TAX
Agreed.   And your grounding system alone certainly cost several thousand dollars more than most ham stations. I will also add, if your ground system, implementation and methods do not comply with NEC, in the event of any loss, your insurance company can simply say "it has been nice doing busi

Re: [Elecraft] K3 FT8 Problem VP6D

2018-10-30 Thread Bob McGraw K4TAX
Depends on which version of WSJT-X being used.    For V1.9.1 the 77 bit message does not apply.    For V2.0.0 RC3 it does apply. 73 Bob, K4TAX On 10/30/2018 10:22 AM, Don Butler wrote: Same intermittent problem here. I finally found that the ‘Decode only 77 bit messages’ box seems to be c

Re: [Elecraft] Avoiding costly lightning damage to your radios gear

2018-10-30 Thread Bob McGraw K4TAX
The word we use is "mitigation".   All efforts in this regard are done to minimize damage.   Note that I used "minimize damage". With lightning, "elimination of damage" is not a word or phrase we use.   Thus with lightning, "mitigation" methods should be carefully considered, and in the finalit

Re: [Elecraft] K3s vs KX3 Quedtion

2018-10-21 Thread Bob McGraw K4TAX
Terry: My first thought, KX3 over K3S, is portability.   If you have the space and don't usually operate portable, the K3S is the choice. As to price that is always way down the list and secondary with me in a much as I demand performance, do not operate portable, have the space for the statio

Re: [Elecraft] K3 vs. KX3 with wsjt-x

2018-10-21 Thread Bob McGraw K4TAX
Make sure you are using only one PTT method. CAT or VOX but never both. I prefer CAT as any signal or any noise on the audio line will trip the VOX and thus hold it in transmit. Bob, K4TAX Sent from my iPhone > On Oct 21, 2018, at 11:04 AM, Bill Frantz wrote: > > I indeed had MIC BTN on

Re: [Elecraft] K3 vs. KX3 with wsjt-x

2018-10-20 Thread Bob McGraw K4TAX
Yes, use only method for PTT.   Either CAT or VOX,  but never both.   I prefer CAT as, for digital operation,  I don't have to mess with the VOX values for my normal SSB operation. 73 Bob, K4TAX On 10/20/2018 6:52 PM, Nr4c wrote: Sounds like you have more than one PTT control active. Check

Re: [Elecraft] OT - Power and my earlier post

2018-10-17 Thread Bob McGraw K4TAX
> wunder > K6WRU > Walter Underwood > CM87wj > http://observer.wunderwood.org/ (my blog) > >> On Oct 17, 2018, at 6:52 PM, Jim Brown wrote: >> >> On 10/17/2018 6:36 PM, Bob McGraw K4TAX wrote: >>> At the same time, many of my contacts are made with 50

[Elecraft] OT - Power and my earlier post

2018-10-17 Thread Bob McGraw K4TAX
ath.  Certainly not encountered by terrestrial HF users. Not picking on you personally, but you made the statement so figure maybe would reply.  Just curious. 73, Ed - KL7UW * that I/F later was used for JT-65 on eme 15 years ago.  Now use my K3 directly connected. Date: Tue, 16 Oct 2018

Re: [Elecraft] No Tx Audio

2018-10-17 Thread Bob McGraw K4TAX
Check your MON level on your K3.   I run mine about 8 for digital modes.  I know nothing about the MicroHam DKII.   I just run the USB interface between the computer running the application software and the radio.    I only use 3 software applications, WSJT-X, HRD or FLDIGI.  And with those, I

Re: [Elecraft] KPA500 Clicks & Pops

2018-10-16 Thread Bob McGraw K4TAX
I do run 400 watts or so on digital modes. Issues are not really noted on SSB or CW modes. I've set the Fan Ctr to 2 and 3 and still noted the issue Was recently showing my K Line to some hams friends. They commented rather negatively on the point. Bob, K4TAX Sent from my iPhone > On O

Re: [Elecraft] KPA500 Clicks & Pops

2018-10-16 Thread Bob McGraw K4TAX
/14/2018 19:52, Bob McGraw K4TAX wrote: What is the recommended solution to stopping the clicks and pops from the KPA500 as the amp heats during transmission and cools during receive?  I've seen one that suggested replacing the screws in the Z bracket with 4-40 x 1/4".    Any tracti

Re: [Elecraft] KPA500 Clicks & Pops

2018-10-16 Thread Bob McGraw K4TAX
I've tried to determine where the clicks originate without success.  I've loosened screws on the top and right side and tightened screws on the top and right side.  No difference. Perhaps someone at Elecraft will add a comment in this regard. I did observe that the 5 screws at the center of th

[Elecraft] KPA500 Clicks & Pops

2018-10-14 Thread Bob McGraw K4TAX
What is the recommended solution to stopping the clicks and pops from the KPA500 as the amp heats during transmission and cools during receive?  I've seen one that suggested replacing the screws in the Z bracket with 4-40 x 1/4".    Any traction to this? The amp performs absolutely fantastic. 

Re: [Elecraft] Confessions of grounding

2018-10-13 Thread Bob McGraw K4TAX
Nope.  That is the same grounding scheme I've used for years. The 3rd pin safety ground is really all that is needed for the station inside. As to lightning protection, that is done outside of the house and takes into account the tower, the rotor, the antennas and it is bonded outside of the h

Re: [Elecraft] Confessions of grounding

2018-10-13 Thread Bob McGraw K4TAX
For the station bonding jumpers, #10 AWG auto primary wire with a ring terminal attached is very adequate.   Easy to work with, inexpensive, does the job,  and makes for a clean installation. Personally, I crimp {mechanical connection}  and solder {electrical connection} my ring terminals on th

Re: [Elecraft] New KAT500/KPA500 Setup Questions (Mark WU6R)

2018-10-12 Thread Bob McGraw K4TAX
Mark: I have the same configuration.  When you transmit into  the dummy load, what mode are you using?    If SSB, there is no output until you speak into the mike with the correct audio settings.   TUNE mode is best for checking to see that all is working. I suggest you see top of page 66 of

Re: [Elecraft] Confessions of grounding

2018-10-12 Thread Bob McGraw K4TAX
I bond each piece of equipment to a common ground terminal on my power supply.  I do not have any ground from the station to the outside.  Only the 3rd pin safety ground is in place.   The station is fed from a common 240V 4 wire service for the amp and other related equipment.  From the 240V 4

Re: [Elecraft] VOX tripping each receive cycle on FT8

2018-10-11 Thread Bob McGraw K4TAX
First, I'd have to ask why are you using VOX?   I find that CAT control is 100% reliable and is equally as fast or faster than VOX.   Just be sure the DLY control on the Signalink is set fully counterclockwise.    Likely your VOX level is too high and AntiVOX level is too low.    I'd opt for CA

Re: [Elecraft] Voice is clipped K3s

2018-10-10 Thread Bob McGraw K4TAX
For my SM58 and my K3S I use the following: 50 Hz    -16 100 Hz  -16 200 Hz  - 9 400 Hz    0 800 Hz     0 1600 Hz   0 2400 Hz  +3 3200Hz   +6 The Behringer XM8500 dynamic mike gives identical performance and it costs only $20.    Heard one and just had to try it.  I can swap between the

Re: [Elecraft] Voice is clipped K3s

2018-10-10 Thread Bob McGraw K4TAX
I would look closely at the ALC level and the CMP level to see that the new mike, which has more output, is not driving things into saturation.    Likewise, as Jim, K9YC says, use the TX EQ to get rid of some of the low end, thus not to suck up power which is not heard on the other end.    And

Re: [Elecraft] NB IF NAR/CODEC

2018-10-08 Thread Bob McGraw K4TAX
I normally start with the IF NB OFF.  Turn on the DSP NB and adjust the level for what I feel is optimum effect.  Then remember the ## and set it to OFF.  Then turn on the IF NB, set it to what I feed is optimum effect.  Then go back to the DSP NB and set it to the previous value.  Best done wh

Re: [Elecraft] CODEC

2018-10-06 Thread Bob McGraw K4TAX
Or if you will, when you sit down to operate, go to Windows Time and Date and update the time. More than adequately accurate for several hours of operation. Bob, K4TAX Sent from my iPhone > On Oct 6, 2018, at 3:15 PM, Larry (K8UT) wrote: > > David > > >There should be very little reason

Re: [Elecraft] CODEC

2018-10-04 Thread Bob McGraw K4TAX
e fire over in a corner of the chassis. Tells you where to look. > > 73, > > Fred ["Skip"] K6DGW > Sparks NV DM09dn > Washoe County > >> On 10/4/2018 3:15 PM, Bob McGraw K4TAX wrote: >> Thank you Don. Over and over again, I've said "what

Re: [Elecraft] CODEC

2018-10-04 Thread Bob McGraw K4TAX
Thank you Don.  Over and over again, I've said "what did you do last, before you broke it?"   Well then, go undo that. 73 Bob, K4TAX On 10/4/2018 5:03 PM, Don Wilhelm wrote: Mike, It is not unusual at all for things to "get jumpy" when the computer is busy doing some frequent task. Why d

Re: [Elecraft] CODEC

2018-10-01 Thread Bob McGraw K4TAX
While I use both WSJT-X, V1.9.1,  and HRD, I allow WSJT to create and save its own log.  Then I transfer the entries from the WSJT log to my other log system.  That then uploads the selected entries to LOTW.    I've more often than not found that if I allow one software to run within or under a

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