Re: [Elecraft] [KX3] Boost Buck 13.8 V Regulator

I've been following this discussion for a while now and want to add my $.02. I used my KX3 as a panadapter, with I and Q out to a good quality 24 Bit 192 kHz sound card on Field Day. Every switching regulator / charge controller / DC-DC converter generates hash on the bands, some much worse than

Re: [Elecraft] 4S lipo battery for KX3?

I use LiFePo4 batteries. 4s will go from 14 to 12V from 0 to 90% discharge. Perfect match for KX3 with full power all the way. No voltage reduction or noisy DC-DC converter needed. Search the Elecraft lists archives for mine and other posts with sources. Mark On Aug 24, 2013 8:03 PM, Gil G.

Re: [Elecraft] 4S lipo battery for KX3?

, Nicklas Johnson n...@n6ol.us wrote: This is the first time I've read about LiFePo4 batteries; is it correct to say that one needs to pair a 3.2V AA LiFePo4 with a dummy AA? Does the timed charger module in a KX3 play nicely with this type of battery? Nick On 25 August 2013 12:23, Mark

Re: [Elecraft] KX3 Macro for Dual Watch on/off split up 2

...@elecraft.com wrote: Great, Jim. It also turns out there's a way to toggle between two or more macros on a single PFx switch. Mark Goldberg thought of this. Here's his example that rotates through four macros on PF1 using self-modifying setups: I used self modifying code. Each macro assigns

Re: [Elecraft] KX3 Macro for Dual Watch on/off split up 2

and the next. Mark On Sun, Mar 3, 2013 at 8:18 PM, Mark Goldberg marklgoldb...@gmail.comwrote: The DELAY is not really needed. From what Wayne says if used on RS232 it will cause a delay as it just gets characters that do nothing. I don't know if it provides much delay if the macro is run

Re: [Elecraft] Zippy LiFePO4 Battery Leads vs. Anderson Power Poles

I tried on similar wire with 45A APPs with some success, about 50%. It is very difficult to get the pins snapped into the housing as the solder adds to the diameter, and the wire insulation gets in the way. I made adapters and stripped the wire down behind the APP housing, slid shrink tubing on

Re: [Elecraft] CM-500

A standard aviation microphone approved to TSO C58 is supposed to meet DO-214 Audio Systems Characteristics And Minimum Operational Performance Standards For Aircraft Audio Systems And Equipment although not all do. Unless you belong to the RTCA, it will cost money to see that document. The

Re: [Elecraft] Programming REQ?

Why not use the TE command? TE (Transmit EQ; SET only) SET format: TEabcdefgh; where a through h are 3-character values, each with a range of –16 to +16 dB. Values a through h correspond to EQ bands as follows: a = 50 Hz, b = 100 Hz, c = 200 Hz, d = 400 Hz, e = 800 Hz, f = 1600 Hz, g = 2400

Re: [Elecraft] [KX3] Has anyone used a PC microphone?

I've used a Plantronics PC headset with good results. You just have to set up the mic gain and EQ and I have gotten good reports. Mark On Sun, Mar 24, 2013 at 6:44 PM, Rich richle...@cox.net wrote: The KX3 manual has a very short discussion on the fact that it is possible to use a standard

Re: [Elecraft] KX3 lithium battery charger

What kind of Lithium Batteries? I have come to the conclusion that 4 LiFePO4 cells in series work well, as they stay between 14 and 12 Volts for most of their useful discharge, which allows full power on the KX3. They should be charged on a balancing charger at least some of the time to keep all

Re: [Elecraft] 4-pound Field Day, anyone?

I am very big on LiFePO4 battery packs, 4 Genuine A123 cell 2.3 AH ones to be exact. They start out about 14V and provide about 2 AH till they get down to 12V when I stop and switch to another one. This allows full power on the KX3 as the voltage drop is very low even when transmitting at 12 W. I

Re: [Elecraft] [KX3] Boost Buck 13.8 V Regulator

How about using a 4S LiFePO4 battery? From fully charged to 15% charge I get from about 14 V to 12 V in RX and very little sag on transmit. Pretty much the ideal battery for this radio in my opinion. They are rated to go down to 10V or so, but since you don't get that much more and you can

Re: [Elecraft] KX3 Field Day tips (batteries, local oscillator isolation, antenna spacing)

I have an issue to report and it seems this thread as good a place as any. It might help someone else trying the same thing. On 6 meters only, it seems the LO leaks out on the outside of the antenna connector. I can hear it in another radio on the same frequency and the RX ISO has no effect. I

Re: [Elecraft] OT: New soldering station needed

I have a Hakko FX-888, works great, looks like a kids toy. I have a variety of tips, large screwdriver to very small conical and have done everything from AWG4 lugs to SOT23 SMTs, leaded and lead free solder. Temp adjustable and very good heat and recovery. I have also used a Metcal and like the

[Elecraft] KPA500 RX Attenuation and TX Without Amp Key

I will contact Elecraft tomorrow, but posting in case someone recognizes the symptoms. I just put together a new KPA500 kit. When I select Operate, the RX through the amplifier is significantly attenuated, many 10s of dBs. The amp will also amplify even with nothing connected to the PA Key RCA

Re: [Elecraft] KPA500 RX Attenuation and TX Without Amp Key

I can't remember which it was) in the TS590SG was > too low such that it put the KPA500 permanently in a transmit state. > Kenwood simply increased the resistor appropriately and now it works fine > just like the TS990. > > I hope that might point you in the right direction. > >

Re: [Elecraft] P3 TX Mon Power Measurement Anomaly

I certainly understand the concern though. Personally, I have replaced UHF connectors with N connectors where I can, use nothing worse than RG214 or LMR400 for interconnects at my station, and have the interconnects as short as possible. I built many cables with exactly the connectors and lengths

Re: [Elecraft] Slighty off topic - 80 meter second harmnic how to stop

I would expect that if it was getting into an alarm system, the alarm would fail in some way. I had a bad problem with mine, cured by a 5th order 200 kHz lowpass filter where simple ferrites and caps did not work. The alarm system has low frequency digital data. I built it with some caps and a few

Re: [Elecraft] Anti Static Bench

I agree with the previous responses. ESD material does wear out, especially in my dry climate. It has to be replaced once in a while. In commercial operations is is tested on a schedule and discarded if it does not pass. It has to be conductive enough to keep parts from damage and resistive enough

Re: [Elecraft] Kenwood TS-590SG with KPA500 amp?

I can't add much more, but the recent KPA500 software supports the serial connection to the TS-590. You don't really need it, but it helps by switching to the right band before you transmit, for example if you are working crossband spit it switches to the band you are going to be transmitting on

Re: [Elecraft] KPA500 Standby to Operate problem

Is there an asterisk on the display of the KPA500? If there is, it thinks it is in TX mode even if the rig is not in transmit. I had that problem and it was a poorly soldered resistor on the front panel board, but a shorted TX line (RCA cable) would do the same thing. Elecraft replaced the board.

Re: [Elecraft] Audio Mixer in the Ham Shack

I also use a mixer and I use a bigger one, a Behringer 1622FX. It has two stereo mixing busses, Main and Sub, so really four channels. You can route any input to either or both and fade from left to right as you wish. I have all the sources from rigs and the PC sound card and mics going to inputs.

Re: [Elecraft] USB Sound Card

I use a U7 with the KX3 and HDSDR. There is an issue with the initialization of the 24 bit drivers. I have set up for 24 bits, 192 kHz and line in using the Asus software, and 24 bits and 192 kHz in Windows control panel. When I turn the computer on and use HDSDR for the first time I have to do

[Elecraft] 100 Ah LiFePo4? was Re: [OT] Zip Wire Misrepresentation?

On Aug 11, 2016 10:12 AM, "Jim Brown" wrote: As to resistance -- I use the shortest practical runs of #10 between my power source (a big 100Ah LiFePO4 battery) Ok, I am curious. Where did the 100 Ah LiFePO4 battery come from? I may have to replace my Lead Acid Deep

Re: [Elecraft] [KX3] A BNC Connector to consider for your KX2 / KX3

And as someone who has built several Baluns, these do not even say what the impedance ratio is. A good Balun will have the right impedance ratio for the intended job, and the right internal impedance between the pairs of wires on the cores to provide a low return loss. It is not easy to get good

Re: [Elecraft] Chinese Filters on eBay

Since you brought this up, I will post a link to my analysis of the knockoff "TCXOs" for the Kenwoods. You do get what you pay for, and you can't even buy good parts for what they charge. The added phase noise of the Chinese parts increases the phase noise of the TX by about 10 dB 15 kHz away. It

Re: [Elecraft] Chinese Filters on eBay

Here is the link. Forgot to add it at the end. Posting on a small screen will get you. https://sites.google.com/site/markstcxomeasurements/ 73, Mark W7MLG On Nov 3, 2016 8:43 AM, "Mark Goldberg" <marklgoldb...@gmail.com> wrote: > Since you brought this up, I will post a

Re: [Elecraft] Dummy loads for dummies

I also found one of the big oil filled dummy loads at a Hamfest. It handles 500W easily. I bring a phone powered USB powered VNA with me to Hamfests to check things out. You never know what you will find! 73, Mark W7MLG On Dec 28, 2016 8:25 AM, "David Olean" wrote: > It

Re: [Elecraft] [KX3] Re: Kx2 paddle issue

I found this site: https://engineerdog.com/2015/01/11/10-tricks-engineers-need-to-know-about-fasteners/ They suggest that studies show lockwashers are ineffective, but then go on to reference other studies that show they are. I guess is all comes down to that common answer in engineering: "It

Re: [Elecraft] [KX3] Re: Kx2 paddle issue

an.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mark Goldberg > Sent: Monday, July 24, 2017 11:09 AM > To: w4sc > Cc: Elecraft > Subject: Re: [Elecraft] [KX3] Re: Kx2 paddle issue > > There are many different Loctites of each color. Exactly what has worked

Re: [Elecraft] [KX3] Re: Kx2 paddle issue

There are many different Loctites of each color. Exactly what has worked for you? I have settled on Blue Loctite 243 for it's improved temperature range, better compatibility with Stainless Steel hardware and oil resistance. 73, Mark W7MLG On Mon, Jul 24, 2017 at 10:05 AM, w4sc

Re: [Elecraft] GPS Disciplined 10MHZ source from China

Thanks for bringing up phase noise. From my research on other cheap devices (knockoff TCXOs), I have found that phase noise was obviously not considered and in that case was truly awful. It was in the -115 dBc range at 100hz, but, likely due to poor design, actually rose to -110 dBc at 10-100 kHz

Re: [Elecraft] New KX2 feature: Internal logging of outgoing CW/data text

Would the KX3 logging feature integrate with the PX3? I have found the PX3 USB keyboard interface very usable for digital operation, but logging is an issue. Dumping the log later in some standard format would also be useful. 73, Mark W7MLG On May 17, 2017 1:04 PM, "Wayne Burdick"

[Elecraft] Order Page Certificate Expired

It seems the certificate used for orders has expired: www.cartserver.com uses an invalid security certificate. The certificate expired on 09/22/2017 04:59 PM. The current time is 09/24/2017 11:25 PM. 73, Mark W7MLG __ Elecraft mailing

Re: [Elecraft] Portable Power for digital and Phone operation

On Fri, Sep 1, 2017 at 10:37 AM, Michael Chowning wrote: > Being there is no better place to get advice than this reflector, I am > seeking your recommendation. I have an Elecraft K3, P3, KAT500 & KPA500. > > I want to operate somewhat portable with the K3, P3, monitor

Re: [Elecraft] OT: LED Light Bulbs

Part of the reason they look so yellow is the low CRI, or color rendering index. Many bulbs lack deep red, so they look yellow even though they meet the color temperature spec, they do it by having blue and more yellow and tricking the measurement. Note that the CRI normally used is still not that

Re: [Elecraft] OT: Selling IC-7300 For Friend

I think Ham radios from everyone follow more of the Elecraft business model. The IC718 was introduced in 2000 or earlier and it is still sold. I think the 7300 is wildly successful (not trying to start a flamewar, but it is the best selling rig at many dealers) and they likely have economies of

Re: [Elecraft] Two tone generator for IMD testing

I have successfully used a soundcard output. I used Audacity to create files with the correct two tone signals. Search for instructions to generate multitone signals. 73, Mark W7MLGj On Dec 4, 2017 11:11 AM, "Michael Walker" wrote: > Thanks, but I need to use it on other

Re: [Elecraft] Local Beacon Splatter

Is this a ham radio beacon? Contact the owner and let them know. It does not sound like it is in compliance. If not a ham radio thing, still contact the owner, as it may be suddenly broken. Best of luck. Mark W7MLG On Dec 16, 2017 7:49 AM, "stengrevics" wrote: I have

Re: [Elecraft] K3S New Builder (Tom NB5Q)

I agree with all this advice. I can tell you that any questions you have will be answered by the fine people on the Elecraft forums, and if they can't, Elecraft provides exceptional help. I have built three Elecraft kits and got help from one of the designers on one of the forums, on a weekend,

Re: [Elecraft] Antenna Analyzer (FA-VA4)

I have one more suggestion. I have a MiniVNA Tiny, expensive at about $600, but it is a full two port Vector Network Analyzer in a 2.5" X 2.5" X 1" box connected via USB. It has both a computer app and a phone app to run it. I have taken it out in the field where I would never consider taking a 75

Re: [Elecraft] K3-0-mini / K3 dilemma

Not knowing much about the protocol Elecraft / Microbit uses, or the IT staff at the facility, I have doubts about what is being done to figure out what the problem is. There are tools, such as Wireshark to look at the packets as they flow through or don't flow through the network. You don't have

Re: [Elecraft] How far can the KPA1500 amp be from the PS?

On Sat, Apr 28, 2018 at 11:08 AM, Dauer, Edward wrote: > Placing both PS and amp where the 220 VAC outlet is accessible is > possible; but then I wouldn't be able to see the amp while operating, which > I would like to do. Wouldn't feel comfortable with a 1500 watt amp

Re: [Elecraft] Elecraft Hex Key worth?

Select "Completed listings" on the left of the ebay page and you can see what past items sold (or did not sell) for. Two recently sold for about $200. That is the real value I would use as a reference. Ebay has transitioned to a lot of "Buy It Now" and "Best Offer" items instead of auctions. Many

Re: [Elecraft] [KX3] KX2 Travel Case for Portable Operation

I got a Sigg Aluminum Survival Kit Box to fit my KX3 and a few extra items to make up my go kit. The one I got is no longer available from where I got it, but try searching "Sigg Aluminum Survival Kit Box" and maybe you will find one that is the size you want. 73, Mark W7MLG On Wed, Feb 7, 2018

[Elecraft] KPA500 Info Disappeared From Website

The KPA500 links seem to have been broken on the Elecraft Website: Not Found The requested URL /KPA500/KPA500.htm was not found on this server. 73, Mark W7MLG __ Elecraft mailing list Home:

Re: [Elecraft] OT Power Strip suggestion.

On Wed, Feb 21, 2018 at 1:41 AM, Jim Brown wrote: > The ONLY safe place for MOV protection is at the service entrance -- the > "whole house protector." The only safe protection on a branch circuit > (that is, anywhere else) is a SERIES MODE protector. Series-mode

Re: [Elecraft] Advice needed: Remote Station Enhancement

Are you sure the KPA1500 will not be able to tune your antennas? It includes a tuner, and I would expect it to be capable. I have been using Arduinos to control things, as they have lots of I/O and appear to the computer as a USB serial port. Those serial ports can be remoted via software,

Re: [Elecraft] KPA500 Faulting on high SWR on power rise

There are a lot of factors that determine what the best choice of Balun is. Unless it is a resonant antenna, the impedance is not purely resistive, usually far from it. It can be almost anything. The feedline length will affect what the impedance is at the tuner. The tuner, if you have one, will

Re: [Elecraft] Decoding the Serial Output from a KX3

I have asked if this will work, but did not get any answers. I suppose I could wire it up and see if it does. 73, Mark W7MLG On Mon, Jul 30, 2018 at 6:21 AM, ANDY DURBIN wrote: > > > KX3 has the option to output aux bus on ACC2 "TRN CTRL (output; XV-series > transverter control using

Re: [Elecraft] Decoding the Serial Output from a KX3

> > P.s. I must have missed your original post because I did not see the post > you indicated you sent to the list. Sometimes I get a bit delete happy :-) > > Regards > Brian > VE3IBW > > On Mon, Jul 30, 2018 at 10:11 AM Mark Goldberg > wrote: > >> I have ask

Re: [Elecraft] Decoding the Serial Output from a KX3

ERIAL, > > RS 232 X to the KX3 baud rate, and connect the KPA500's RS232 XCVR port > > (the MALE DE-9 connector, rarely used) to the KX3. The S-BOX can do that > > for you using a standard serial cable plugged into the back and an RCA > > stereo cable plugged into

Re: [Elecraft] Decoding the Serial Output from a KX3

That is a breakout box. Thanks for all the suggestions, but I am looking to "roll my own" custom Arduino based interface for the KX3, KPA500 and Scorpion Screwdriver antenna and was hoping to get anything someone has already done to start from. I will shamelessly reuse what someone else has done,

Re: [Elecraft] Decoding the Serial Output from a KX3

> with other serial devices and KEY CW.). > > 73, > Bob, N6TV > > On Mon, Jul 30, 2018 at 11:29 AM, Mark Goldberg > wrote: > >> I was trying to find out if the Auxbus works between the KX3 and KPA500. >> That would be ACC2 IO = TRN CTRL and connect ACC2 tip t

Re: [Elecraft] Decoding the Serial Output from a KX3

I am definitely interested. I had asked if connecting the Aux bus might be useful but did not get any response. This would be a good solution. I am using the KX3 and KPA500 in a mobile installation, get about 220W which is enough for now, but better integration would be nice. I have to manually

Re: [Elecraft] Noise cancelling headphones

lem very well. > > The battery and Bluetooth are in an accessible blob on the A20 cord. But > the idea of 1K$ to start with, and then dropping that 1K$ out of warranty > to remove the cord beyond the blob gives me the hives. > > 73, Guy K2AV > > On Sat, Aug 4, 2018 at 12:25 A

Re: [Elecraft] HRD slow accessing K3 frequency controls

Can you try the K3 utility and talk directly to the K3 and eliminate HRD from the picture? You could try the Windows and Linux versions and compare operation. Someone else may have to suggest what operation would exercise the interface. I would NOT try a firmware upgrade, try something innocuous

Re: [Elecraft] Noise cancelling headphones

Amazon shows the HP8000 available from third party sellers at wildly varying prices. Sometimes they are bad or fake unfortunately. They claim new, but don't have enough info listed to tell if it meets your criteria. As far as I know, aviation headsets will not have wireless for the main headset

Re: [Elecraft] [KPA1500] Auto start KPA1500-Remote in host mode ?

Take a look at Autohotkey. It is a scripting language for Windows that can do things like simulate key presses and mouse clicks, and a whole bunch more. If you can write it in their scripting language and compile it to an executable, that can be run on startup. I use it to automate the

[Elecraft] KXUSB Signal Levels Was: Re: Connecting a KXUSB to the K2 RS232

HI, can you confirm that the KXUSB uses TTL signal levels rather than standard RS232 levels? I got an extra one with my PX3 and repurposed it to talk to a GPSDO that requires TTL serial levels and it seems to work fine. I just put a 3.5mm TRS jack on the GPSDO. 73, Mark W7MLG On Mon, Aug 6,

Re: [Elecraft] K3 TX Calib Dummy Load Recommendations

A good one that you know is 50 ohms over the range of frequencies and power you want to use it at. Unfortunately, any particular model may be good or bad, depending on how it has been used or abused. Is there any way you can get access to an analyzer to determine if the dummy load is good? I have

[Elecraft] Control of Screwdriver Antenna

Some years ago, there was a discussion of using the KX3 to control a screwdriver antenna. Send a tune signal, measure the SWR, move the antenna, step and repeat. Has anything come of that? Signal buffering would be needed. I have had good luck with an h bridge motor driver based on the irf3205

Re: [Elecraft] Breakers for KPA1500?

Actually, if you look at the NEC (National Electrical Code), they have factors for ambient temp and wire temp ratings. Other codes around the world are similar. For example, if you use AWG 12 Type UF cable, the base rating is 20 Amps. With the temperatures we have in Arizona, where it can get

Re: [Elecraft] Breakers for KPA1500?

. Boehner MD wrote: > WOW! > > Thanks for that link! Now just to find it in PDF. > > '73 de JIM N2ZZ > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mark Goldberg > Sent: Monday, J

Re: [Elecraft] Breakers for KPA1500?

Let's put this in monetary terms. 100 ft of 12/2 with ground is $56 at Home Depot. 100 ft of 10/3 with ground is $138. If you pay an electrician to do the work, the difference won't be 10% of the bill. If you do it yourself, following code and getting it signed off by an electrician and

Re: [Elecraft] KPA500 installation on side?

power switch will be on the rear, but very near the top edge. That's how > mine will be, when it arrives this week --- I hope.. > >> Ted, KN1CBR > >> -- > >> Message: 9 > >> Date: Sun, 8

[Elecraft] KPA500 installation on side?

Can the KPA500 be installed on it's side? There are feet there. I want to install it in an RV and there is more room for wiring and fan air movement that way. A search did not turn up any answers. 73, Mark W7MLG __ Elecraft mailing

Re: [Elecraft] K3S Microphone Cable

On Tue, Jan 16, 2018 at 10:48 AM, Jim Brown wrote: > The nature of the shield matters a lot. Back in 1994, Neil Muncy, ex-W3WJE > (SK), published the landmark AES paper in which he exposed both The Pin One > Problem and Shield Current Induced Noise (SCIN). The Pin One

Re: [Elecraft] OT: An interesting view of IPC-610

I am aware of that article and did reference the fact that some do not like these requirements. The author does not suggest an alternative. In the practice I have seen in the aerospace industry, there was not the large amount of rework described. The emphasis was on using correct processes to

Re: [Elecraft] Resistor and capacitor installation techniques: trim before or after soldering?

h.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mark Goldberg > Sent: Sunday, March 25, 2018 6:20 PM > To: Elecraft Mailing List <Elecraft@mailman.qth.net> > Subject: Re: [Elecraft] Resistor and capacitor installation techniques: > trim > before or after sold

Re: [Elecraft] Resistor and capacitor installation techniques: trim before or after soldering?

For commercial products, there is IPC-610. That is 400+ pages of descriptions of how to determine acceptability of and build electronic assemblies. It has very clear explanations and lots of pictures and diagrams of right and wrong ways to do things. Unfortunately, you may have to pay to get a

Re: [Elecraft] 1.5V recharchable AA cells for KX3?

Amazon reviews are not good for similar cells of the same brand, lots of references to them popping and leaking chemicals out, sometimes even with the supposed right charger. They also are reported to lose capacity quickly with a few discharge cycles. I also expect that 3000 mAh is an

Re: [Elecraft] KPA1500 - Static IPv4 address

I have to second the VPN solution. I have a similar setup with an incoming VPN. You can be anywhere in the world with a computer or mobile device and connect to your home network and have access to everything as if you are there. I also use OpenVPN, but on a larger Linux computer. It also can be

Re: [Elecraft] OT: USPS mailing

Actually, there are issues with USPS Priority Mail if you use Paypal and sell to someone you don't know and hope to use the Seller Protections. If you read the fine print, Paypal does not accept the proof of delivery unless a specific signature is obtained, which is not available with Priority

Re: [Elecraft] [KX3] Urban stealth HF: Inside-the-backpack loop antenna?

I would expect any high Q antenna like a loop would be detuned by any movement or any metal you pass by. One more reason to support automatic mobile screwdriver / mag loop antenna tuning on the KX series. A flag on a backpack would be more or less ignored. Just put a flag on the top of the AX1.

Re: [Elecraft] How to wire KX3 to an Amp

Are you going to use the KX3, KXPA100 and the KPA500 all together? I can't help with that as I don't have the KXPA100. I use the KX3 with just the KPA500. You get about 250W out with 12W in. You use the ACC2IO cable that comes in the right angle cable kit or standalone and an RCA to RCA cable.

Re: [Elecraft] KX3 drifting downwards

What is your menu setting for MIC BTN? If it is set to UP.DN and used with a non Elecraft mic without up/down buttons, it may trigger the frequency change. Try changing the setting to PTT. 73, Mark W7MLG On Wed, Dec 5, 2018 at 6:41 AM André .. wrote: > Hello to everyone . > > I have a

Re: [Elecraft] Fwd: KPA1500 problem

It's been said before. Check your cables and connectors for arcing. It won't happen with lower power but as the voltage goes up with higher power it may arc across a bad cable or connector. Possibly even in a tuner. Can you test with different cables or a dummy load? 73, Mark On Sun, Dec 30,

Re: [Elecraft] KPA-1500 failed!

It's been said there are no coincidences. Have you checked your coaxes / connectors? I agree that protection built in should not allow radios to blow finals, but this sounds like too much of a coincidence with two different radios blowing to not be an external intermittent connection. Try wiggling

Re: [Elecraft] KPA1500 Remote - How to get it to work on a WAN ?

Take a look at this in the archives: http://elecraft.365791.n2.nabble.com/KPA1500-Static-IPv4-address-td7645170.html Maybe something there will help. There are ways to do it in a more secure manner. I'm not a big fan of exposing your $6000 amplifier with no security to the wild internet.

Re: [Elecraft] Duty on warranty repairs

On Fri, Feb 1, 2019, 7:33 AM Barry > The insurance claim, processed by the vendor paid for the replacement which > was then shipped. The invoice on the second one was marked "replacement > for > damaged product," and valued at $10, so it passed right through without any > duty or tax. That's

Re: [Elecraft] Elecraft K4 and Accessibility

What do people think about voice recognition? Recent Google Android phones do a decent job of voice recognition on the phone itself with no connection to the internet or cloud voice recogniton servers. There are open source voice recognition software applications that run on Linux. No idea how

Re: [Elecraft] Terminal resistance

I cut a cross-section of my battery cable crimps and it essentially is one solid block of copper: See this page: https://sites.google.com/site/marksrvmods/home/battery-wiring Note that expensive crimpers are "calibrated". They make one or more connections on sacrificial wiring and cross-section

Re: [Elecraft] K4 Field Day report

Oops, adding my call. Mark, W7MLG On Mon, Jun 24, 2019 at 11:44 AM Mark Goldberg wrote: > I'd be interested to hear how it does in the presence of close in strong > signals, especially SSB. I was operating a KX3 on SSB in close frequency to > someone that was far away, but the

Re: [Elecraft] K4 Field Day report

I'd be interested to hear how it does in the presence of close in strong signals, especially SSB. I was operating a KX3 on SSB in close frequency to someone that was far away, but they had all the knobs up to 11 and was maybe S9+20 and about 10 kHz wide with lots of splatter. I could hear anyone

Re: [Elecraft] KX3 won't go above 10W

Go with LiFePO4 cells. Four cells will keep the voltage between 12 and 14.4 V from 10% to 100% state of charge and most of the time the voltage is between 13 and 13.5 V. I use small ones (3 AH )for backpack portable operation, 20 AH for fixed portable and my RV has 400 Ah to run the rig forever!

Re: [Elecraft] KX3 batteries

I've brought the 3 Ah ones on aircraft multiple times and had no issues. I brought a copy of the UN safety certification that I got from the battery company but have never been asked for it. The batteries did save me from having my bag checked once though. I put my bag in the overhead. Someone

[Elecraft] Yet Another K4 Thread (YAK4T) (TM) - Sampling Rate, ENOB, FPGA? and Requests

Way down in the specs you have the sampling rate, 122 MHz and I don't see a spec for the A/D Equivalent Number Of Bits (ENOB). That is a useful measure of the dynamic range, as most if not all 16 Bit A/Ds have a lower number of ENOB. Perhaps these should be more prominently advertised as they can

Re: [Elecraft] Dummy load

How much do you want to spend? One of these Bird Termaline series, or similar is the top of the line, but will cost you: https://www.birdrf.com/Products/Test%20and%20Measurement/Loads/Coaxial-Terminations/500-watts/8201_500-Watt-Oil-Cooled-Terminations.aspx I was lucky to find a DA412B/U

Re: [Elecraft] WWV 100th Anniversary Event

On Mon, May 6, 2019 at 12:12 AM John Marvin wrote: > > So, how is this Elecraft related you might ask? Well the club is still > looking for operators, and Elecraft is a sponsor for the event, > providing four KX3's and four KPA500 amplifiers for the event (Thanks > Wayne and Eric!). So if you

Re: [Elecraft] Mobile high power

My Sprinter is rated by Mercedes to handle 100W at HF. I'm pushing that a little, but that is another reason I am satisfied with 250W. Sprinters are used a lot for ambulances, work trucks, and government vehicles, all with radios, so I figure if they had RF problems, they would have to fix them. I

Re: [Elecraft] OT a bit: K3 Ant Tuner

d idea. And to me it seems the answer is yes. > > I think we all agree that the right feed impedance and load impedance > for a filter is important. And as I pointed out, not just for power > handling, but also for the filter to actually filter as it was intended. > > 73, > Dav

Re: [Elecraft] OT a bit: K3 Ant Tuner

I could not let this go. I've done a lot of work with bandpass filters. The mismatch will degrade the filter. For an example, I used Elsie, which is a filter calculator. Using the example 20 Meter bandpass filter, the passband loss is about .25 dB with matched 50 ohms in and out. Changing the

Re: [Elecraft] OT a bit: K3 Ant Tuner

On Fri, Jul 5, 2019 at 12:54 PM Jack Brindle via Elecraft < elecraft@mailman.qth.net> wrote: > As commonly used, bandpass filters have one main use - to protect > receivers. That may be the local receiver, protecting it from sting out of > band signals, or a neighbor receiver, gain protecting it

Re: [Elecraft] KX3 Headphone set up problem

The exact cable Wunder suggested is still available at Amazon for $4.95. They can probably thank him for some sales! I bought one. 73, Mark W7MLG On Fri, Jul 5, 2019 at 1:11 PM Don Wilhelm wrote: > Note carefully that Wunder specified a "SPLITTER" and that is different > than an 'adapter'. >

Re: [Elecraft] KX3

Forgot to include my call. 73, Mark W7MLG __ 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:

Re: [Elecraft] KX3

The I/Q feeds through the PX3. You need to take the I/Q out of the PX3 and send it to a high quality sound card, usually a USB sound card. If you want wideband, choose a 192 kHz card from here: http://www.telepostinc.com/soundcards.html I use a U7. The rig control also feeds through the PX3

Re: [Elecraft] When Transmitting on FT8 - KPA500 has issues - KD8ZYD

I'm going to take these two postings and suggest the possibility of RF getting into the USB link to the PC causing it to drop samples. Check the grounds and make sure there is a good ground connection between the PC, Signalink and the radio equipment. Try ferrite beads (Mix 31) on the USB line or

Re: [Elecraft] When Transmitting on FT8 - KPA500 has issues - KD8ZYD

Can you watch the SWR when this happens? If the antenna is hard to tune, the tuner may find a match, but it may actually be fairly lossy, with power being dissipated in the tuner. As the tuner inductors heat up, they change value, and the SWR goes up, triggering a retune. You should be able to see

Re: [Elecraft] KX3 batteries

LiFePO4s will stay at high enough voltage for most of the discharge cycle to keep the KX3 above 15W. 9Ah will run it a long time. Regards, Mark On Fri, Jun 28, 2019 at 1:14 PM Chris Waldrup wrote: > Will the Bioenno batteries have enough terminal voltage to get the 15W? > I'm looking at a

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