Re: [Elecraft] RFE KAT500 One Button Tune

In a word, no. The KAT500 listens to the K3 over the Auxbus, but does not have the ability to talk to the K3. So, there is no way for the KAT500 to tell the K3 about tune. I feel your frustration, and wish we could implement this capability. 73! Jack, W6FB > On Jun 28, 2020, at 6:06 PM, Eric

Re: [Elecraft] KAT500 Remote software and KPA500 remote software

is seeing it fail. 73! Jack, W6FB > On Jun 23, 2020, at 7:12 PM, Jack Brindle via Elecraft > wrote: > > Let's see if we can determine why you are seeing this behavior. What platform > are you using (Window, Mac, Linux), and exactly what is the scenario and > conditions you ar

Re: [Elecraft] KAT500 Remote software and KPA500 remote software

Let's see if we can determine why you are seeing this behavior. What platform are you using (Window, Mac, Linux), and exactly what is the scenario and conditions you are seeing? In other words, please provide more info. I believe K6KR has provided a bit of additional info. He wrote the KPA

Re: [Elecraft] KAT500 Remote software and KPA500 remote software

Take another look. You should be able to power on/off the KPA500 using the front power button as well as through the KPA Utility. The Utility does a great job of detecting the KPA500’s current data rate whether it is on or off (the two rates may be different) and will communicate at the proper

Re: [Elecraft] K3 upgrade

That is a KIO3B, Not a KXV3B. One is for computer & AuxIO communications, the other has BNC connectors for various RF functions. 73! Jack, W6FB > On Jun 19, 2020, at 2:24 PM, Nr4c wrote: > > I believe it’s 3 boards. It included a back panel board with USB and a RJ45 > that replaces the DE-9

Re: [Elecraft] KPA1500 Operation on 6 Meters

That means that he needs to check the connectors, adapters and cable that run from the KPA500 to the LPA-100 and potentially the LP-100A itself. The directional coupler is the last component in the KPA500 chain. For reflected power, it simply reports the conditions it sees from the antenna

Re: [Elecraft] [K3] Sub receiver intermittant failures

That probably wouldn’t help. In this case the system includes the SubRx, the Synthesizer and all the interconnects and cables that connect these to the rest of the radio. I would check the interconnects, especially the tmp coax cables that go from the SubRx to the rear panel connector and to

Re: [Elecraft] KAT500 Remote software and KPA500 remote software

Are you referring to front or rear panel power? The K3 Utility can certainly power on a KPA500 if the rear panel switch is on. If that switch is off, it must be turned on before the front panel switch (or remote power-on) works. Now if you have a big relay in the power line to the KPA, it needs

Re: [Elecraft] Key Clicks

I read that also. It was not a KPA500 or KPA1500. The Elecraft amplifiers are designed with solid-state switching and are capable of switching very rapidly, in much less time than 8 mSec. In fact the amps will switch quickly enough to allow true QSK in the K3/K3S. Fred’s analysis is correct in

Re: [Elecraft] KPA500 Dead

Actually four. There are two on the power supply board that protect the low voltage supply. Since the front panel appears not to be powering up, it is possible that one or both of these may be blown. I don’t really have any suggestions for what might be wrong, so the best thing to do is to

Re: [Elecraft] KPA1500 power per frequency bin

The K3 has only one way to communicate with the KPA500 and KPA1500, that being Auxbus. There is no communications on this path that allows setting of specific power levels in the K3 - there is only the OP/STBY that simply selects either the K3 high power (STBY) or low power (OPER) modes. You

Re: [Elecraft] KPA1500 power per frequency bin

It’s not a KPA1500 function, but rather a K3 function. And the K3 has no concept of KPA ATU bins. 73! Jack, W6FB > On Jun 2, 2020, at 3:39 PM, Hank Garretson wrote: > > It sure would be nice if KPA1500 remembered K3 power for each frequency bin > instead of for each band. > > Is there a

Re: [Elecraft] Spkrs+Ph ??

Rich may have a very good reason. I also use that setting. My shack is a nice shed in the back yard. When my wife or daughter come out while I am operating with headphones on, the sound fro the speaker lets them know that I cannot hear them. They know to wait until I finish the current QSO,

Re: [Elecraft] NOT the feedline

Is it the 3 element 6m LFA? That is an interesting antenna. Which of the baluns did you get? They show three - two for 50 - 70 MHz, and a third for HF and 6m. G0KSC has some interesting designed - I will be waiting to hear your results with this one. I’ll go through your details here and see

Re: [Elecraft] NOT the feedline

Lets take another try at this. There still isn’t enough information in your emails to really determine what might be going on. From the amplifier’s viewpoint, *everything* from the antenna jack on the back of the amplifier is part of the antenna system. So far we know it consists of some

Re: [Elecraft] NOT the feedline (was KPA-1500 faulting on 6m; SWR issues)

Balun? Is it new? What kind? You have pretty much eliminated the KPA1500 with this test. This sounds like a balun toroid heating up and causing problems. You will see perfect conditions at low power, and the AA230 will also show things in great shape. They are not stressing the system. But 1500

Re: [Elecraft] Field Day

multiplier of five, the batteries must be charged from something other than a motor driven generator or commercial mains." Very clear. 73! Jack, W6FB > On May 24, 2020, at 1:46 PM, Jim Brown wrote: > > On 5/24/2020 1:16 PM, Jack Brindle via Elecraft wrote: >> Two thi

Re: [Elecraft] Field Day

Be careful following this one. His suggestions will leave you in class D. Why? Two things - if the computer controls the radio (and it should for logging and sending exchanges), then it must also be run on emergency power. Second, the addition of a wall charger for the batteries puts you firmly

Re: [Elecraft] KRC2 Manual Errata??

Rich; The KRC2 manual is correct. It is a matter of understanding the frame of reference for the markings. The KRC2 was originally designed as a peripheral for the K2, so the interface ports use the K2 I/O port details. On the KRC2 schematic, 8R, VRDET, 12CTRL, ALC and AUXBUS are all K2

Re: [Elecraft] K4???

One thing Al doesn’t mention is that Sacramento is only calling part of the shots. Here in the Bay area we are under control of the local authorities, who have things locked down much tighter than the rest of the state. The state folks are talking about starting to ease things over the next

Re: [Elecraft] KPA-500 Issues

Check the cable connections, including making sure that none of the pins are bent in the AuxIO connectors in both cables (K3S - KAT500, KAT500 - KPA500). Also, make sure that the PTT line is actually being asserted. The asterisk is displayed when the Key In is asserted. If it isn’t displayed

Re: [Elecraft] K3S Firmware Update for Mac

What directory is the app located in? If on the desktop, move it to the Applications folder. In Catalina certain directories are restricted - you have to give permission to access files there. This sounds like the app is unable to access some of its resources. By the way, you have two of us

Re: [Elecraft] K3S Firmware Update for Mac

Just to make sure - you are trying the latest version of the utility, freshly downloaded from the web site, right? If not, then go to the website and download it. Only the latest version is Catalina compatible. Now, exactly what happens when you install and try to run the Utility? 73! Jack,

Re: [Elecraft] CM500 headset on K3S and KX3?

Frank; The rear-panel mic input on the K3 and K3S is actually a stereo jack. The ring connector is not connected. Plug the CM-500’s mic plug in (as I do), and it will work just fine! Remember to enable bias on the rear panel Mic as W3FPR noted. The CM-500 is an excellent headset for use with

Re: [Elecraft] Upper limits of KPA500?

>From the KPA500 manual, Rev E1, page 41 Specifications: Duty Cycle at 500 Watts 10 minutes key down / 5 minutes standby Sometimes it is very worth while to read the manual. It gives me something to do when being stuck at home for so long gets me down. 73! Jack, W6FB > On May 4, 2020, at

Re: [Elecraft] Upper limits of KPA500?

Let me state things a bit better this time. The amplifier is designed to protect itself, and does a very good job of it no matter the condition. It will do a good job of warning you before anything bad happens; make sure bad things don’t happen very much and your amp will have a very happy life.

Re: [Elecraft] Upper limits of KPA500?

Dave; The KPA500 will protect itself above 90C, but it will work quite well at 70C. Why do you stop at 70C? 73! Jack, W6FB > On May 3, 2020, at 1:26 PM, Dave Cole wrote: > > Hello, > > I just got the new MMSSTV software, and will be running a bit of SSTV. SSTV > is 100% duty cycle. > >

Re: [Elecraft] Coronavirus

Depends on the parts. The largest parts you see are indeed made in the US - these being the sheet metal, push buttons and many other components. Global economy? Yes. Is the entire box made from components coming from outside the US? Definitely not. And I am 100% sure that the radios and devices

Re: [Elecraft] KPA 500 fault!

A “270V ERR” fault indicates that the TR switch bias supply is not working. This may be caused by the top cover being removed, the safety switch attached to the top cover becoming loose or an actual failure of the 270V supply. Since your main HV supply is now down close to 0V, it looks like you

Re: [Elecraft] USB C to The K3's RS232?

Yes. It works quite well. I have several USB-C to USB 3.0 adapters, including the Apple ones that I use. Plugged into one of these I have a real FTDI USB to Serial adapter which talks nicely with the Mac. For my K3S, I simply plug the USB cable into the K3S’s USB jack and get both serial

Re: [Elecraft] Windows Needed

Before this email query gets hijacked too far afield… Macintoshes do a very good job of handling the needs of hams, especially with Elecraft devices. I do _all_ of my computing with Macintoshes, including a lot of product development. So, for Tommy: MacLoggerDX from Dog Park Software is an

Re: [Elecraft] KX2 / KPA500

I went back and reread this . My question is this - with the interrupter in place, does the K3 still key the amplifier? I suspect you are running into the issue of pull-ups on the K3 pulling the PTT signal up to Vcc. Of course Vcc when the K3 is off is 0 volts, which causes the KPA to key. We

Re: [Elecraft] KX2 / KPA500

Jim; Disconnect the AUX IO cable from the KPA and try it again with the KX2. Does it have band it likes to stay on? (I’m thinking 60 meters here). 73! Jack, W6FB > On Apr 28, 2020, at 2:47 PM, James Bennett via Elecraft > wrote: > > Hi Mark, > > In one of the books I have (or had), possibly

Re: [Elecraft] Voltage drop in DX Power to K3

There is one more item that has been forgotten. The K3 has an SB530 Schottky diode in the power input circuit between the input fuse and the main 12V bus (but not the 100 watt 12V PA bus). This will account for about a half of a volt drop. If you are using the front panel voltage reading, this

Re: [Elecraft] Latest on the new home for my K3...

That works great! Brother has wide tapes of various colors that wrap around the cable nicely. You can have text or images. Pretty cool! 73! Jack, W6FB > On Apr 23, 2020, at 12:37 PM, Bob McGraw K4TAX wrote: > > I just label mine coax feeds with my P-Touch. Just read what is on the label. >

Re: [Elecraft] [Elecraft-K3] Latest on the new home for my K3...

Dave; Perhaps this has been asked, but what are you doing for equipment bonding? 73! Jack, W6FB > On Apr 22, 2020, at 10:22 AM, Dave Cole wrote: > > Please thank him for that tip!!! I will be using that from now on!!! > > 73, and thanks, > Dave (NK7Z) > https://www.nk7z.net > ARRL

Re: [Elecraft] KRC2 setup for Icom

Let me explain a bit more. The KRC2 followed the same thinking as the K2 - we put non-RS232 signals on the DE9 pins. That means that only pins 2 and 3 should see those signals, but not the others. I remember there being a warning in the manual about this, but I don’t find it at this point. We

Re: [Elecraft] KRC2 setup for Icom

Rich; What are the jumper settings in the KRC2? It is _very_ important not to use a straight-through cable with the KRC2. As documented in the KRC2 manual, the pins are connected to the microcontroller, and the +/- 12 V excursions of the RS-232 levels will damage the microcontroller I/O pins.

Re: [Elecraft] K3/KAT500/XV integration

You can try it, but I think the real solution may be to leave the XV powered while the K3 is on. The reason is that the XV has weak pull-up to +5V on its Auxbus line. When the XV is off, that 5V line is actually at 0 volts, which means it is pulling the signal to the common reference. This,

Re: [Elecraft] Electrolytic Capacitor failure

If Ray has a K3/10, then the power supply is perfectly fine. The recommendation for that is "13.8VDC @ 6A for K3/10”. There are a lot of K3/10’s in the field. Nothing in his post indicated which transceiver he has. However, if indeed he has a K3/100, then Frank is right (as usual). Ray should

Re: [Elecraft] K3/KAT500/XV integration

George; That message occurs because something is loading the Auxbus when the K3 is powered on. Make sure that the KAT500 and the XV144 are both powered up when you turn on the K3. They can be powered on at the same time, but the task needs to be done before the K3 enumerates the Auxbus, which

Re: [Elecraft] Kpa500 lcd display issue

I believe the answer to be yes. It would overwrite the parameters, so any problems in the saved configuration would be restored. Of course, so would all the valid parameters. 73! Jack, W6FB > On Apr 14, 2020, at 4:40 PM, Andy Durbin wrote: > > Hi Jack, > > Just for future reference - Does

Re: [Elecraft] Kpa500 lcd display issue

Andy; Your analysis was correct. Somehow the LCD ADJ value became set to 100. KD5SPX was able to resolve the issue by figuring out the exact keypresses needed to access the menu setting and lower the value. The range of the value is 0 to 100, with the default being 30. This value sets the duty

Re: [Elecraft] Kpa500 lcd display issue

There is no serial command to change the LCD ADJ setting. However, you can reset the saved parameters by holding the EDIT button while powering up the KPA. 73, Jack, W6FB > On Apr 13, 2020, at 1:03 PM, Andy Durbin wrote: > > "All other front panel stuff works I suspect the buttons for the

Re: [Elecraft] Kpa500 lcd display issue

Wayne; What are you calling “test pattern”? There is an LCD test in the system, but it is not available normally, and also not a settable configuration. Give me more info and I’ll try to diagnose. 73! Jack, W6FB > On Apr 13, 2020, at 12:30 PM, Wayne Suite wrote: > > The lcd on the kpa 500

Re: [Elecraft] KPA1500 hum - problem solved

When he added the amplifier, the return currents on the coax became much greater. The second problem is that the switch then added the return currents of the vertical to those induced into the dipole and made things worse. I see the need for chokes on BOTH antennas. Makes sure they are heavy

Re: [Elecraft] kx3 utility

The utility is telling you that it is communicating with your KX3 at 38400 bits/sec. The KX3 has firmware revision 2.90. This is not an error message. It appears to be working just fine. 73! Jack, W6FB > On Apr 2, 2020, at 9:41 AM, 1lasportsman 1lasportsman <1lasports...@cox.net> > wrote: >

Re: [Elecraft] K3 on SSB

I believe what Frank is referring to is not Tx audio, but receive audio during times of very heavy band loading, which pretty much occurs only in busy contests such as CQ WPX SSB last weekend. During these times stations are basically on top of each other or very closely spaced. We tend to hear

Re: [Elecraft] The Big Three...

There is a catch in this, of course. Several of the top contesters are sponsored by some of the radio companies. The winner in the 2014 WRTC was sponsored by Icom as were many others. The same was true in 2018. Of course, they get the best radios, delivered at the competition. Thus the radio

Re: [Elecraft] K3 Utility vs macOS Catalina

The Mac Utilities currently on the Elecraft web site are both signed and Notarized. They are ready to go with Catalina. No need to right-click open any longer. A Big thank-you to the program’s author, W4SMT for taking care of this. 73! Jack, W6FB > On Mar 27, 2020, at 8:27 PM, Hisashi T

Re: [Elecraft] SOLVED!: K3 Utility vs macOS Catalina

Way to go, Don! Glad you got it going. 73! Jack, W6FB > On Mar 27, 2020, at 8:34 PM, Don Putnick wrote: > > > The short version: usb-to-serial adapter driver snafu > > The long version: Way back when I bought my K3, Elecraft was having problems > with the KUSB. I bought a Keyspan adapter

Re: [Elecraft] K3 Utility vs macOS Catalina

10.15.4 released on Tuesday. It should be available in your System Preferences / Software Update panel. 73! Jack, W6FB > On Mar 27, 2020, at 5:27 PM, Grant Youngman wrote: > > AFIK 10.15.3 is the latest GA version of Catalina. Are you using a > beta/developer version? > > Grant NQ5T > >

Re: [Elecraft] K3 Utility vs macOS Catalina

That shouldn’t have been needed. The drivers have been built into the macOS since 10.9. David, suggestions? 73, Jack, W6FB > On Mar 27, 2020, at 5:08 PM, Don Putnick wrote: > > That didn't work. BTW when I got the KUSB yesterday I went to the FTDI > website to download the drivers. The VCP

Re: [Elecraft] K3 Utility vs macOS Catalina

Guys; 32 bit apps won’t even launch on Catalina. I suspect that the application’s preferences are corrupt, and have advised him how to find and delete them. 73! Jack, W6FB > On Mar 27, 2020, at 4:38 PM, Grant Youngman wrote: > > The latest versions posted on the website all work fine under

Re: [Elecraft] K3 Utility vs macOS Catalina

Don; Which version of the K3 Utility are you using, and which version of Catalina? 73! Jack, W6FB > On Mar 27, 2020, at 4:04 PM, Don Putnick wrote: > > Hi all, > I'm working with Rob at Elecraft on this, but I'm trying to gather more > data for us. When I open the K3 Utility under Catalina,

Re: [Elecraft] A broken K3

David; Go back and re-read the message from Keith Trinity. Keith is one of the guys down in Watsonville and knows more about the K3 than just about anyone. To put it another way, you were indeed contacted by Customer Support. 73! Jack, W6FB > On Mar 24, 2020, at 7:46 PM, David Olean wrote:

Re: [Elecraft] Keyoard help

Richard; A couple of suggestions: 1) Look for a key labelled “fn” on the keyboard. Pressing that while simultaneously pressing a Function key should give you what you want. 2) Look for an HP application or control that will allow you to turn on and off the functions, or even change them to do

Re: [Elecraft] Shipping Status updates

The shipping services are extra busy at present in this area. It appears that the number of on-line orders for various products (like toilet paper) has gone way up as people are not able to obtain them locally. We are seeing deliveries delayed by a day or two for both UPS and FedEx. It doesn’t

Re: [Elecraft] Per-Band Power Setting Issue

Doubtful. Wayne is awfully busy on other projects. We would not want to have fixed-in-firmware drive limits - KPA500s vary in their needed drive level. Some need more power than others for drive. For example my older KPA500 (actually the first one) needs 35 to 40 watts to drive it to 500

Re: [Elecraft] Extra Protection For KPA500?

One other thing to consider is that you don’t want to connect all of the pins straight through from the K3 to the KPA500. There are some conflicts that will cause problems. The Elecraft cables are set up properly with the appropriate pins cut that should not connect between the two devices. An

Re: [Elecraft] Extra Protection For KPA500?

The key here is the need for the AuxIO cable. The K3 exposes the second set of per-band power settings when it knows the KPA is attached and is in OPER mode. Of course to be able to communicate the AuxIO cable needs to connect the KPA to the K3, and the K3 needs to be set with RADIO = K3. Once

Re: [Elecraft] Elecraft Digest, Vol 190, Issue 17

Norman; Elecraft has 200Hz, 250Hz, 400Hz and 500Hz filters. You can order them at the web site at the URL: https://elecraft.com/pages/k-line-transceiver-k3-k3s or call the main number at 831-763-4211 Monday through Friday to order. The

Re: [Elecraft] TCP Port for KPA500 and KAT500

I suspect the addresses in the remote software are fixed, or at least that is their default. With that in mind, if you want to use the remote software, then you probably should set up the ethernet serial adapter to use those specific ports. I’m not really familiar with how the remote software

Re: [Elecraft] TCP Port for KPA500 and KAT500

There must be an interface box in between the network and the KPA500 and KAT500, since neither support network communications, only serial. You might want to describe what you are doing and what devices you are using. 73! Jack, W6FB > On Feb 17, 2020, at 11:37 AM, VO1HPFrank wrote: > > This

Re: [Elecraft] KPA500 MCU LOAD screen

I have seen this also, and agree with Andy’s assessment. A program that polls the ports to find its target can also cause this issue. Even though the KPA is displaying the MCU LOAD message, as long as no firmware data has been sent to the KPA500 and the firmware is actually not corrupt, you

Re: [Elecraft] Update: K3 Hard of Hearing

John; It sounds like it is time to call tech support to see if they can help. They are pretty good at figuring out what happened and how to fix it. Trying the second K3 in its place, and it works fine, tells me that you may have an issue in the front end. But they will know better. Good luck

Re: [Elecraft] Possible K3 over shoot on transmit

Actually ALC is there because people expect it to be there. We recommend not using ALC between the KPA500 and K3. 73! Jack, W6FB > On Jan 12, 2020, at 12:00 PM, Bob McGraw K4TAX wrote: > > Yep, the power control circuit does have a bit of initial character > overshoot.This is noticed

Re: [Elecraft] Possible K3 over shoot on transmit

There are two things at play here. First, the KPA500 has an unregulated power supply. On first key down, the power will spike, then quickly lower as the big filter capacitors decay from their peak voltage to the rms voltage. This is normal and we all see it. While I am sure you are seeing this,

Re: [Elecraft] Radio and amplifier environmental specifications

Probably the biggest limiter will be the LCD. LCDs do not like cold temperatures - anything below freezing can be a problem, but below 10 degrees they tend to stop working and turn black. Yes, the do recover when it gets warm - usually. I wouldn’t want to subject my station to anything below

Re: [Elecraft] Annoying Beeps

I have learned to trust things that Bob says, but this one didn’t agree with my memory. So I checked the source code for the KPA500 on this one. The KPA500 only emits a tone when a fault occurs. It does not emit a beep for key entry. The SPEAKER menu item enables/disables the tone for faults.

Re: [Elecraft] KPA500 fan won't shut off

When the KPA shuts down, the power relay is switched off, then the driver transistors for the fan are turned on. The microcontroller shortly executes a restart, which puts the MCU into boot mode, but does not reset the I/O ports. Thus the fans are turned on, allowing the big power capacitors to

Re: [Elecraft] KPA500 fan won't shut off

That won’t do any good. The main firmware has shut down at that point. The fan is running because the relay is stuck, which is not something that firmware can fix. Call tech support. 73! Jack, W6FB > On Nov 25, 2019, at 7:49 PM, Eric Norris wrote: > > Reload the firmware. > > 73 Eric

Re: [Elecraft] KPA500 SWR Calibration

The Breune Bridge directional coupler, designed by and named for Warren Breune of Collins Radio, can be a very accurate and useful device for measuring power. I was lucky to learn about it from W1FB when we both worked at the League. Elecraft has used it in several radios, including the K2. We

Re: [Elecraft] KPA500 SWR Calibration

Bob; The KPA500 does not use a Breune style bridge, but rather a true directional coupler. It does not need to be nulled; there is no adjustment. There is an adjustment for the power; see the PWR ADJ setting in the manual. 73! Jack, W6FB > On Nov 17, 2019, at 6:58 AM, Bob McGraw K4TAX

Re: [Elecraft] Update on Band Tracking

Be sure to check the pins on the AUX-IO cable connectors. The small DE-15 pins can easily be bent, and if so they may short to another pin or not make contact at all, causing the exact problem described. If they are bent, you may be able to carefully straighten them, but most likely you will

Re: [Elecraft] KAT-500 remote control using serial port

David; Sorry I didn’t’t have the opportunity until now to answer your question… The answer is in the KAT500 Programming reference. You probably want to use 38400 bps, 8 N 1 to communicate with the KAT500, as is described in the Serial Port Overview section of that manual. The manual is

Re: [Elecraft] KAP 500 Remote ON/OFF Via AUX Conn

Do you have the rear panel switch on? Pin 8 is in parallel with the front panel pushbutton, so it will power on/off the KPA500 under the same conditions as the front panel power button. 73! Jack, W6FB > On Oct 31, 2019, at 12:35 PM, DAVID INGEBRIGHT wrote: > > I'm wanting to utilize the AUX

Re: [Elecraft] KPA 500 glitch

Jim; Check the AUXIO cable to make sure it connects to the K3S and the KPA500 (or KAT500) properly. This sounds like the Band1 signal may not be making proper contact. The KPA500 watches the K3S’s Band signals for its band selection when RADIO is set to K3. If doesn’t see the combination for

Re: [Elecraft] K3S K-line cabling

em to operate as a single unit in 3 boxes. > Only thing I'd love to see is for the K3 "Tune" button to put the KPA500 in > Stby & Tune the KAT500. > > 73 > George AI4VZ > > > > > -Original Message- > From: Jack Brindle via Elecraft > &

Re: [Elecraft] KPA500...standby vs. operate

the > second list of things? > > I have a K-Pod button dedicated to turning VOX on and off. > > Wes N7WS > > On 10/27/2019 11:54 AM, Jack Brindle via Elecraft wrote: >> The specific answer to your question isn’t in the hardware, but rather the >> firmware.

Re: [Elecraft] KPA500...standby vs. operate

ton dedicated to turning VOX on and off. > > Wes N7WS > > On 10/27/2019 11:54 AM, Jack Brindle via Elecraft wrote: >> The specific answer to your question isn’t in the hardware, but rather the >> firmware. With that in mind, >> going to STBY does the following: >>

Re: [Elecraft] K3S K-line cabling

Hi David! Great to hear form you... To expand a little on Don’s excellent info, The PC connection for both the KAT500 and KPA500 are mostly used for remote control and firmware update. While you can send data to them from a transceiver (usually Kenwood) to control things, for your situation,

Re: [Elecraft] KPA500...standby vs. operate

The specific answer to your question isn’t in the hardware, but rather the firmware. With that in mind, going to STBY does the following: 1) Bypasses the TR switch, so that the signal path goes direct between the input and output RF ports. 2) Turns off the 60V power to lessen the load. 3) It

Re: [Elecraft] KPA500 and KTA AUX Cable/Remote

Dave; You do not need the AUX IO cable. You do need to connect the PTT lines from the transceiver to the cat, then from the KAT to the KPA. Both KPA and KAT will work quite well with RF sensing for frequency. If you wish to add frequency control from the transceiver, you can connect both KPA

Re: [Elecraft] Center-fed antennas

As usual, there are exceptions to everything. A multi-band beam, such as a C3S or the modern equivalent, will perform incredibly well when used with bandpass filters and a triplexer. The 10,15 and 20 meter stations all will use the antenna through the triplexer/BPFs with no issues. This also

Re: [Elecraft] KPA500 - Advantage of min fan speed?

All you guys had to do was ask. When going down, the hysteresis is 3 degrees. That means that each threshold is shifted down 3 degrees. The hysteresis is necessary to keep the fan speed from bouncing up and down when the temperature is at one of the switch points. 73! Jack, W6FB > On Sep 30,

Re: [Elecraft] KPA500 STBY to OPER

Maybe to the “Not quite as good as…” category. The issue is timing. Your code has to poll to determine the KPA op state, then start all the transitions which will result in the PTT line being negated. There are a lot of delays involved here. With the K3/KPA, the button press causes the KPA to

Re: [Elecraft] KPA500 STBY to OPER

Andy; It works very well. The op has to set the K3 so that the power is controller per-band. When the KPA is switched to OPmode, it sends a message to the K3. The K3 then switches to the amplifier selection for power, which the op has et specifically for the KPA. The converse is also true,

Re: [Elecraft] KPA-1500 Power Output Variation

Jim; It would be interesting to see the source of the variance. You might insert the Bird between the transceiver and the KPA to see if there is any variance there. The amplifier has fixed gain - it has no ability to vary its gain during transmission other than a protective pad that is

Re: [Elecraft] KPA500 Coax size requirements

Carter; Welcome to the world of higher power. The information you have received from others is very good. There is one other thing to watch for, it is something that most hams who upgrade to higher power experience. When we operate at low power, there are a lot of things we can get away with

Re: [Elecraft] KPA500 - KAT500 stopping K3 boot

Check your cables. It may be that you are using a straight-through cable with the power pins connected between the K3 and the KPA. These two pins (pin 8 on both sides) must not be connected. 73! Jack, W6FB > On Aug 8, 2019, at 1:05 PM, w4sc wrote: > > Is there an issue with the KPA500 being

Re: [Elecraft] KPA500 PA current

Andy; This is the effect of not being able to obtain perfect components. It is easy to forget that the toroid cores used for the inductors vary, as do the windings and capacitors. There will be variances because of this which will be different from KPA to KPA. They are set up for best case

Re: [Elecraft] KPA500 PA current

own wrote: > > On 8/4/2019 9:20 AM, Jack Brindle via Elecraft wrote: >> And, do you have chokes on the coax at the KAT500 or KPA500? > > I hope not -- to be effective, a choke must be that the antenna's feedpoint. > A choke on an antenna in the shack does no

Re: [Elecraft] KPA500 PA current

Tell us a bit more about the antenna. How is it fed? Is it properly choked to eliminate RF shield current (this is current flowing on the outside of the shield. It is a bit early to remember the proper term…)? And, do you have chokes on the coax at the KAT500 or KPA500? I think we need a bit

Re: [Elecraft] Elecraft K3S usb and USB data only cable

You would be far better off finding a USB cable with built-in ferrite to handle the small noise. The noise is most likely coming from the NUC as part of its USB polling regime, and being transmitted along the shield of the USB cable. Using the ferrite should eliminate this issue. You don’t need

Re: [Elecraft] Sudden K3 failure

Perhaps the RxAnt is selected? Easy to do, easy to miss. Done it more times than I care to remember. 73! Jack, W6FB > On Jul 26, 2019, at 7:42 PM, Mpridesti via Elecraft > wrote: > > Sorry- did not fully see the problem > > The receiver is not working on any band not just 40. Sounds like

Re: [Elecraft] KIO3B usb com port not communicating

Do you have BOTH plugs connected to the P3? You need to use the cable that has not one, but two DE-9 connectors - this allows the data to flow from the USB interface through the P3 and then back to the K3S. Without it, I would expect exactly the behavior you describe. In fact, I experienced

Re: [Elecraft] KPA500 fan won't shut off

Dinner on Andy? Your analysis is spot on. When the KPA is requested to shut down it does some housekeeping, saving various things and putting the amp into a safe condition, including setting the 60V to off. It then sets the fan for full speed operation to bleed off the 60V power and waits for

Re: [Elecraft] KPA500 fan won't shut off

The KPA runs a check on the memory contents when it starts up. If something has changed that should not, then it will ask for a fresh firmware load. Since Jerry is not seeing this, then I don’t believe there is a firmware issue. I _am_ concerned about the issue, which is why I suggest calling

Re: [Elecraft] KPA500 fan won't shut off

That means the power is not shutting off. We bleed off the capacitor charge through the fan at front panel shutdown, which is why you hear the fan run for normally a short time. Turn off the KPA using the rear pane switch and call tech support in the morning. They need to look into this one.

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