Re: [Elecraft] KX3 receive discontinuity at 6.000 MHz

I watched the lights on the KXP100 carefully tonight and it was switching to ANT 2 at 6 MHz. In my shack, ANT 2 is connected to a dummy load. I switched it to ANT 1 and Arnie Coro was coming in nicely both above and below 6 MHz. wunder K6WRU Walter Underwood CM87wj

Re: [Elecraft] PROPOSAL: K2/10 Battery LiPO / 8AA carrier option

Specs say the K2 operates on 10-15V, page 2 of the K2 manual online. Here are my notes for 3S LiPO and 8AA NiMH packs: Type      Vmin Warn Vnom Vmax Vstorage  3S LiPO  9.0  9.6 11.1 12.6 11.55  4S LiPO 12.0 12.8 14.8 16.8 15.4 8AA NiMH  6.4  7.2  9.6 12.010AA NiMH  8.0  9.0 12.0 15.0 So, a 3S

[Elecraft] KX3-Utility worked in May but not now.

Hello, As the subject-line states, my records show that all was good this past May when I checked if I was up-to-date firmware-wise. Also, in September, for the power-up sequence, I successfully used the Utility to put in a banner with my call-sign. The idea today was to get DX-Lab and its

Re: [Elecraft] KPA-1500 issues

I think the point Mike is trying to make is that many SWR meters don't actually measure SWR all that accurately as impedance changes. While the length of transmission line doesn't affect SWR (other than the effect of loss), the impedance at a given SWR does change with line length, and that

Re: [Elecraft] FS: New CM500 headset

David Woolley wrote: "Are you sure of those figures? 30dB is normally only considered mild loss. 15dB is in the normal range." Good question - I am unsure. I have my annual hearing test tomorrow and will ask my audiologist for a spectrum chart for each ear. I have an optional remote that

[Elecraft] K3s/P3 For Sale

K3S-F Transceiver #11139 100W upgrade for K3/K3S, Factory Installed ATU for K3/K3S, Factory Installed K3 TCXO 1ppm, factory installed 2.7kHz Elecraft Filter K3 500 Hz, 5 Pole Filter, factory installed KRX3A 2nd RX Factory Installed KFL3A-2.7K Filter installed in KRX3A K3 500 Hz, 5 Pole Filter,

Re: [Elecraft] Phantom signals

Pete, Any chance you can borrow a P3 to see if those spurs are present both with and without the computer? That would be a good test if you can manage it. The other thing that may help is to bond the K3 to the other gear, following the paths of the IF out coax and also the audio cables. Bond

Re: [Elecraft] KPA-1500 issues

I fail to see what that will prove. The only length that will do anything exciting is the 1/4 wavelength line and even that doesn't affect the SWR.  The other two will just repeat (less loss) on the input side, what terminates the load side. Wes  N7WS On 11/27/2018 3:51 PM, Michael Walker

Re: [Elecraft] Wish I had a KAT1500

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

Re: [Elecraft] FS: New CM500 headset

A friend of mine told me about the new Olive hearing aids coming from S. Korea. They are currently being sold only on Indiegogo and one ear is $139 instead of the multikilobuck jobs. I'm interested to hear how they work for him. You configure the amplification and response curves using a

Re: [Elecraft] Phantom signals

Trouble is, my computer supplies N1MM+, including its spectrum display.  Catch 22 73, Pete N4ZR Check out the Reverse Beacon Network at , now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. On 11/27/2018 6:16 PM, Don Wilhelm

Re: [Elecraft] Wish I had a KAT1500

Ten Tec made the 253 automatic tuner and a friend of mine bought his in 1988 or so and still uses it daily with his Orion II and 425 Titan. Ed.. AB4IQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Peter Dougherty (W2IRT)

Re: [Elecraft] Wish I had a KAT1500

I agree, Victor! I have a newer HF-Auto which is even more problematic than the AT-Auto. The issues for me are 40 and 80. I have a shorty forty Yagi, with about 175 kHz between the 2:1 points. Since I normally operate in the bottom end of the band (CW and occasionally FT8) I set the resonant

Re: [Elecraft] Phantom signals

I sometimes notice a host of phantoms that follow the tuning, but only when the preamp is off. Turning on the preamp generally kills them all. This doesn’t help with the fixed frequency junk being generated by the myriad of switchers in the house, though. Different issue. Grant NQ5T > On

Re: [Elecraft] KPA-1500 issues

> On Nov 27, 2018, at 12:02 PM, Bill Johnson wrote: > > If one thinks about it, no auto tuner can be expected to get an exact match > unless it is adjusted manually (that would be a PITA). When I think about it, it seems pretty obvious that an autotuner could get at least as good a match as

Re: [Elecraft] KPA-1500 issues

Interesting! I just ran some tests on my station into Bird load; tuner bypassed: At 50.1 mHz: LP-700 1.06 K3 1.5 KPA1500 1.0 At 9.56 mHz (geometric mean freq) LP-700 1.05 K3 1.1 KPA1500 1.0 At 1.825 mHz: LP-700 1.05 K3 1.1 KPA1500 1.0 My KPA1500 looks good but K3 is off on 6m. 73, Roger

[Elecraft] P3 Phantom Signals

I've noticed a large number of "phantom" signals on the P3. They look like signals but when I turn the RX dial, they move along with the cursor. When I turned the P3 off and then on, they went away of 40m but that same thing didn't happen on 15m. Any ideas? 73, Ken, K6LA / VY2TT

Re: [Elecraft] KPA-1500 issues

The ATU in the K3, which should work exactly like the one in the KPA1500, seems to consistently find a very good match, at least on the lower bands where the L/C resolution is very good. Why the KPA1500 often fails to find such a good match is a mystery to me. The only difference should be the

Re: [Elecraft] Phantom signals

Another thing to suspect is noise generated by a computer, or ethernet modems and routers and being routed to the K3 and P3 via the K3 to computer connection. I believe that is why Tom suggested winding the USB cable through a type 31 ferrite core. BTW, that core should be near the computer

Re: [Elecraft] KPA-1500 issues

Mike, I don't know if that really explains SWR, but with the different loads, I "get" what you are alluding to. One comment is that those feedline lengths should be electrical lengths - they will be shorter than the physical length by the amount contributed by the feedline velocity factor.

Re: [Elecraft] Phantom signals

Hi, Absolutely no sign of any of these spurs here with my K3S. Since they are at constant frequencies they must be coming in through the K3 front end (*not* at the IF level). So either your K3 front end is generating them (which it shouldn't) or they are present in your environment. Again, since

Re: [Elecraft] KPA-1500 issues

If you truly want to understand SWR, I recommend you pick a frequency and make up a 1/4, 1/2 and 1 wavelength sections of 50ohm coax. Then measure the SWR at those points into various different resistive loads, like 10, 25, 50, 75, 100, 150 and 200 ohms. I think you will find the results very

Re: [Elecraft] KX3 not switching ant when changing bands

Instead of grounding each piece of equipment separately to a ground rod, try "bonding" instead. Connect the KX3 to the PX3 with heavy wire (or braid), then connect the KX3 to the KXPA100 with heavy wire - from the KXPA100, connect to the ground rod. You should see a reduction is audio

Re: [Elecraft] KPA-1500 issues

A few months ago I wrote about the potential errors in measuring SWR with amateur grade equipment. See my comments in this thread: http://elecraft.365791.n2.nabble.com/K3-SWR-Numerical-Indication-td7643839.html I imagine "the best they can do" is accurate. Wes  N7WS ps. I also said that if I

[Elecraft] KX3 not switching ant when changing bands

Hi, Following F. Cady advice on grounding the station equipment to a common bus, I did so. My set up includes a KXPA100 with the ATU, the KX3 and PX3. Now I noticed that the KX3 does not always indicate the same antenna as the KXPA100 when I switch bands. Sometime it does and then

Re: [Elecraft] Wish I had a KAT1500

I would worry about exceeding voltage ratings on capacitors even if it was pre-tuned. I believe in judiciously exceeding ratings of conservatively rated devices, but this doesn't seem "judicious!" 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On

Re: [Elecraft] KPA-1500 issues

If one thinks about it, no auto tuner can be expected to get an exact match unless it is adjusted manually (that would be a PITA). And if done manually, that doesn't mean that the match is perfect. It just appears that way. Consider what goes on with feedline, connections and the antenna

Re: [Elecraft] Wish I had a KAT1500

If you manually tune at low power first, then there should rarely be an issue. Frequency hopping with the segments memorized should yield good results as well. If there are changes in the antenna due to wind, moisture, reaction to other materials, etc., then one can expect the tuning to need

Re: [Elecraft] Wish I had a KAT1500

My somewhat unique antenna system presents SWRs up to about 8:1 on some bands, so this would be kind of limiting. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 18:39, Don Wilhelm wrote: Vic, From what I have heard, the KAT500 will handle

Re: [Elecraft] KPA-1500 issues

There is definitely room for improvements in the tuning algorithm. Because of this I have tuned all my segments manually. I find if the SWR is not adjusted to be close to 1:1 in all segments of a band then the drive requirements vary across that band, which would be very annoying. In

Re: [Elecraft] FS: New CM500 headset

Are you sure of those figures? 30dB is normally only considered mild loss. 15dB is in the normal range. I have at least 40dB. across the spectrum, in one ear, and 15dB at 500Hz, degrading to 70dB at 8kHz, in the other, and I'm only classed as having a moderate loss. These figures are a

[Elecraft] Loaded K3 with 2nd Receiver For Sale

This K3 has been Sold. 73 Paul w2eck __ 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://www.qsl.net

Re: [Elecraft] PROPOSAL: K2/10 Battery LiPO / 8AA carrier option

I like the idea. You'd have to add a low voltage sensor though to protect the battery and radio from over discharge. It would be pretty light too. That said, the battery only puts out 11.1volts. Will a K2 run on that? I honestly haven't checked.

[Elecraft] KPA-1500 issues

I've experienced some of these same issues with my KPA-1500.  In addition, sometimes the amp will switch to stand-by for no apparent reason, on 6 meters the AT won't tune a 1.7 to 1 SWR under 1.5 to 1, and one of the exhaust fans got a good deal noisier after about 25 hours of operation.  My

[Elecraft] Contest noise

In W TN I use a HyTower vertical on the low bands. 80m & 40m were very quiet and very good condx here. With K3 & KPA500 got 38 entities on 80m & 69 on 40m. One night on each band. K9IL __ Elecraft mailing list

[Elecraft] PROPOSAL: K2/10 Battery LiPO / 8AA carrier option

I'd love to see an optional cover that would allow me to switch in a 3S LiPO like this one: https://smile.amazon.com/dp/B075FPZL2F/ref=dp_prsubs_3 I would envision a replacement top plate with a battery door.The inside connector could be power pole, or deans or XT60.Leave enough room in the

Re: [Elecraft] Wish I had a KAT1500

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

Re: [Elecraft] Wish I had a KAT1500

Vic, From what I have heard, the KAT500 will handle 1500 watts, but at an SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. At lower power (its rated power of 500 watts) the KPA500 will tune a 10:1 SWR. 73, Don W3FPR On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP

Re: [Elecraft] (OT) CQWW CW band noise

Yes, Higher at night than during the day. We did have rain move through Friday and Sunday here in East TN. NR in K3 helped a lot. 73, Mike On Monday, November 26, 2018 6:35 PM, Robert G Strickland wrote: Was it me/here, or did others encounter high band noise conditions during the

[Elecraft] Wish I had a KAT1500

I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1

[Elecraft] FW: FS K3 P3 W2 KAT500

Correction in Subject line; KAT500 I am listing these for a Ham friend. He uses his KX3 and these are surplus to his needs. K3/100 $1895 P3 -- $595 W2 - $220 KAT500 --- $495 If interested, call me; or contact me off line. I am good in QRZ. Ron Durie WB4OOA Elecraft

Re: [Elecraft] KX3 receive discontinuity at 6.000 MHz

I believe my KX2 and your KX3 use almost identical BPF and LPF network switching breakpoints (not including the KX3 6m band): BPF/LPF Span (MHz) Ham Bands (meters) Below  4.5   160, 80 (160 below 3.0) 4.5 to  8.5    60, 40 ( 60 below 6.0)  8.5 to 17.0   30, 20 ( 30 below 13.0)

Re: [Elecraft] Funky CW from K3

First question: Do you have the old (original) synth board or the new (K3S-type) KSYN3A synth(s)? The new synth board alleviates these CW problems ("faster CW break-in and more accurate CW timing" as compared with the original KSYN3 board). Second question: What is the CONFIG:TX DLY set to? If it

[Elecraft] FS K3 P3 W2 KAP500

I am listing these for a Ham friend. He uses his KX3 and these are surplus to his needs. K3/100 $1895 P3 -- $595 W2 - $220 KAT500 --- $495 If interested, call me; or contact me off line. I am good in QRZ. Ron Durie WB4OOA Elecraft K-Line 704-843-3681

Re: [Elecraft] Funky CW from K3

Mark, At what keying speeds? See the K3 menu CONFIG: CW QRQ. That mode will allow clean CW keying up to 100 WPM. However, the transmit and receive frequencies must be shifted with each code element, and further if RIT, SPLIT or XIT are turned on, QRQ mode will be automatically turned off.

Re: [Elecraft] (OT) CQWW CW band noise

Gregg, I'm using a GAP Voyager vertical for the low bands and during the contest I thought the conditions were bad. The DX signals were just above the noise. I did work some DX on 160 which was new for me. I went to bed at midnight. I see from your QRZ page that you use the same barber as I

Re: [Elecraft] KPA1500 in CQWW CW

Yes to all... Richard *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU, J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV *Be joyful in hope, patient in affliction, faithful in prayer* On Mon, Nov 26, 2018 at 5:15 PM K9MA wrote: > This was my first

[Elecraft] Funky CW from K3

Been having issues with the quality of the CW sending from my K3. Still chasing down other possible fixes but recently heard that there was a problem sending over 30 wpm with RIT on? What is the story on this and fix? Regards, Mark, K1RX

Re: [Elecraft] (OT) CQWW CW band noise

I operated 80 SB and for the most part it was tough sledding from here in GA. Conditions were not good. Others reported good conditions, so who knows. Gregg W6IZT -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Robert G Strickland Sent: Monday, November 26, 2018