Re: [Elecraft] Using KPA1500 with Flex6600

It will work with either the USB or network connection to PC. 73 Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Ray Spreadbury via Elecraft Sent: Tuesday, June 21, 2022 2:10 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] Using KPA1500 with

Re: [Elecraft] Relocating my KPA-1500 - need cable

Running 1500 watts on 6 meters does get the fans going  73 Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Julia Tuttle Sent: Saturday, June 4, 2022 12:45 AM To: j...@kk9a.com Cc: Elecraft Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

Re: [Elecraft] Relocating my KPA-1500 - need cable

Hi Bob, Peter already has the rig to Y-Box cable. He just needs to replace the Y-Box to amp cable with longer one. Peter, replacing the amp to Y-Box cable with longer one is the best method for remoting your amp. The Ethernet cable from amp to switch in basement will allow you to use the

Re: [Elecraft] K4 Data Mode Questions

I'll answer #2 first - if WSJT-X is set to Data/Pkt (which it should) in setup/radio then yes, the radio will switch to DATA #1 - I am guessing you are using the USB cable to PC for sound? Check Windows Line USB Audio CODEC and make sure level in Windows is 100. Then on radio tap TX and Line

[Elecraft] K4D - programming command to set or get low and high cut RX filters?

Hi All, I am writing a Node Red interface to the K4D and looking through the programming reference manual. Is there a command to retrieve or set actual current low or high cut values of the receive filter? This would be useful as a way to have more than three filters defined. I know there is a

Re: [Elecraft] Shipping via UPS - A Lesson Learned the Hard Way

I have a shipping scale here and prepare my own shipping labels for UPS, including insurance. Then I can go to the UPS Store and drop it off without paying their high fees. I do the same for Fed Ex and USPS. 73 Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On

[Elecraft] K4D R29 beta ESSB and CESSB - Rolls off low end TX frequency response when COmp at 1 or higher.

Hi All, Just received a K4D from a friend. I have it connected and just getting used to the radio. We operate ESSB (4 kHz LSB) on the lower end of 80 meters where there is ample room without causing interference. When you rag chew for several hours it is much more pleasing to listen to.

Re: [Elecraft] KAT500 ANT1 problem

Yes, Andrews especially for Heliax hardline  73 Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of j...@kk9a.com Sent: Monday, July 12, 2021 11:09 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KAT500 ANT1 problem So does Andrew/Commscope.

Re: [Elecraft] Remote Programs for KPA500 & KAT500

Node Red. Runs on a Raspberry Pi connected locally to amp and tuner then control and monitor available from a web browser, both locally and remote. Access remotely can be secured to prevent unauthorized access. Irwin, I am planning a demo of Node Red to FRC club on one of the informal Tuesday

Re: [Elecraft] Buyer Beware!

Already removed. -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of W6IPA Sent: Saturday, February 27, 2021 3:30 PM To: Ron Manfredi Cc: Elecraft Refl ; Grant Youngman Subject: Re: [Elecraft] Buyer Beware! Thanks for explaining - this is definitely suspicious - I

Re: [Elecraft] Sudden KPA1500 power reduction

1. Depends. My KPA1500 has same NXP 1K50H devices as my PG-XL. (yes, I have both). I heard some KPA1500s had different devices than the NXP but cannot confirm that 2. Yes. Shipping for a while now. Here's my comparison of the two since I own both. The KPA1500 fan noise is better to my ears

Re: [Elecraft] Sudden KpA1500 power reduction

Just my guess is one of the LDMOS devices let out the magic smoke? Just a thought... Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Dana Roode K6NR Sent: Saturday, February 20, 2021 9:16 PM To: Elecraft Reflector Subject: [Elecraft] Sudden KpA1500

Re: [Elecraft] KPA 1500 fan speed at turn off

I use Node Red to control and monitor the KPA1500. I have written into the flow to delay turn off of the amp when I click power off until the temperature of the amp is down to 38 C. The fans are programmed to turn off @ 39C. This way I can walk away after clicking OFF and not wait for it to cool

Re: [Elecraft] KPA1500 goes into firmware load

I use the Wake on LAN packet via Ethernet to turn on my KPA1500. This is sent from a flow I wrote in Node Red running on a Raspberry Pi. It allows me control and monitoring of the amp (meters, power on/off, op/standby, ant 1/2) from any web browser, including smartphones with two factor

Re: [Elecraft] help with writing a macro for the KPA 1500

To elaborate, the ^PF0 and ^PF1 are not valid commands. If you want to string multiple commands on a button, each command must be followed by a semicolon with no spaces. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Howard Sherer Sent: Saturday,

Re: [Elecraft] help with writing a macro for the KPA 1500

Use the KPA1500 Utility program. In the PF box for PF1 just put ^XI0; In the PF2 box put ^XI3; No need to put PF1 and PF2 in front. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Howard Sherer Sent: Saturday, October 24, 2020 3:13 PM To: elecraft

Re: [Elecraft] ARRL Award to Jim Brown, K9YC

Jim is well deserving of the award! Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Dauer, Edward Sent: Sunday, October 11, 2020 9:31 PM To: 'elecraft@mailman.qth.net' Cc: Jim Brown Subject: [Elecraft] ARRL Award to Jim Brown, K9YC If this has already

Re: [Elecraft] KAT500 remote

You could possibly look at Node Red which runs on a Raspberry Pi. I use it with a KPA1500 and I know there is a flow (programming) for the KPA500 as well. The Pi runs on your home network and you use a USB to serial cable from the KPA500 to the Pi. You can control and monitor the amp from any

Re: [Elecraft] KPA1500 firmware 2.48 beta available

Using 2.48 here and no issues ragchewing on 80 meters or doing digital FT8/FT4 on several different bands. I have the XCVR port connected to the USB port of a Flex 6700 via the KXUSB cable. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Bob Wilson,

Re: [Elecraft] Local KPA1500 operation via KPA1500 remote

Glad you got it working! 73 Dave wo2x -Original Message- From: Jim Cary Sent: Saturday, September 19, 2020 4:23 PM To: rocke...@gmail.com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] Local KPA1500 operation via KPA1500 remote HI Dave, The key was using the “find KPA1500) on

Re: [Elecraft] Local KPA1500 operation via KPA1500 remote

Verify your baud rate and com port in the remote program (USB) matches the port and baud when using the utility program. Since the utility program works the cable connections are good. I am using 230400 baud You can also select Local Connect/USB in the remote program and select find KPA1500.

Re: [Elecraft] Seeking comments on Ham Expo from participants

The event was free and enjoyable. Being able to interact via chat with reps from different companies was a great idea. The prerecorded presentations were for the most part great. The site navigation needs to be improved, especially on an iPad. The text chat on the iPad had the last line of

Re: [Elecraft] KPA1500 Alpha testers sought: Kenwood, Flex, Yaesu exciters

Hi Dick, I would be interested in participating. Using a Flex 6700 via the KXUSB cable from amp direct to USB port on radio. Set up to track the TX slice on radio. Been working fine. Flex has a setting to auto poll. I also have written a flow for Node Red to monitor and control the amp via a web

Re: [Elecraft] KPA 1500 HELP!!

Sounds like one of the LDMOS devices may have let out the magic smoke. Contact support so they may properly troubleshoot the issue with you. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Salvatore ["Ted"] K2QMF Sent: Saturday, July 25, 2020 2:07 PM

Re: [Elecraft] KPA1500 with K4 tracks VFOs with 1 kHz resolution

I have seen this behavior using a non-Elecraft exciter (Kenwood) and KPA1500 amp on digital modes. In my case it was right after connecting the new radio and TX audio levels were too high, causing splattering. The freq counter in the amp wasn't happy. Lowered audio level to where there is no ALC

Re: [Elecraft] KPA1500 with K4 tracks VFOs with 1 kHz resolution

Hi Wayne, Can future KPA1500 firmware allow the smaller bins to be utilized via standard CAT protocol over TCP/IP? I can feed the amp exact frequency info via a Node Red Raspberry Pi. Right now using CAT over the KXUSB cable. Also it would be desirable to have CAT take priority over internal

Re: [Elecraft] KPA-1500 Pure Signal Output

Yes, depending on serial number of your amp it will output the correct level without any additional attenuation. New amps have the mod already done. I modified my amp s/n 423 by changing two surface mount chip resistors on the filter board in the amp. Not for the faint of heart. One of the chip

Re: [Elecraft] Help with KPA1500 P/S

Are you talking about removing the cable from the amp? It just pulls out. There is some tension on the contacts so it will require a little force. Just pull straight out. If you are talking about the chassis mounted Power Poles, there are screws on the inside that hold a bracket and wedge

[Elecraft] KPA1500 fan mod done - MUCH better

Hi All, Received the new LED board for my KPA1500 power supply. Easy to swap out, six plugs and two screws. You can move one plug at a time to the new board so there is no chance of screwing anything up. To put the screws back in I suggest a Phillips screwdriver with magnetic tip. It took more

Re: [Elecraft] FIXED--was NOT the feedline

A layer of friction tape is also a good way to keep the connectors sticky free. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Josh Fiden Sent: Wednesday, June 3, 2020 4:35 PM To: Elecraft Reflector Subject: Re: [Elecraft] FIXED--was NOT the

[Elecraft] KPA1500 PSU fan mod - Need resistor

Hi I emailed support over the weekend and have not heard back. Not sure if they received the email or are backlogged in response due to COVID-19, so posting here. Looking for the resistor needed for mod to lower PSU fan speed on KPA1500 s/n 423 73 Dave wo2x

Re: [Elecraft] KPA-1500 power supply fan noise

Hi Eric, My 1500 is s/n 423. I do think the power supply fans are a bit loud in standby. Is my amp prior to the resistor change? I have added the load resistor in the field and done the sample out mod for adaptive predistortion in the field also. 73 Dave wo2x -Original Message-

Re: [Elecraft] K1-4 low power and poor receive on 40 meters

Hi Don, You nailed it. No output from the 15 MHz crystal. The other three bands are showing good output. I checked the relays K1 and K2 to verify each has pins 3 to 4 conductivity when on 40 meters (set radio to 40 meters, power down, and remove filter board since relays are latching. One side

Re: [Elecraft] Elecraft Digest, Vol 193, Issue 35

That is fine for resonant antennas but I would like to monitor between the amp and tuner. I know the amp has a sample out port for adaptive predistortion. I had changed the two small (very small) resistors on the filter board to adjust the sample out level to work with an Anan radio with no

Re: [Elecraft] K1-4 low power and poor receive on 40 meters

Hi Don I have done that using the Marconi for RX, then touching up for TX. I understand 40 is a combo of 30 & 40 settings. After carefully retuning (done it several times) the best I can get on 40 is about 60 to 75 mW. 30 makes better than 2 watts. The menu for power out is set to 2.0 on 40.

Re: [Elecraft] Looking to add LP700 to KPA1500 - ideas?

Thanks Andy. That is something to think about. Wouldn't be that hard. Have to check my purchase date to make sure it is out of warranty.  Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Andy Durbin Sent: Wednesday, May 20, 2020 12:55 PM To:

[Elecraft] Looking to add LP700 to KPA1500 - ideas?

Hi All, I am thinking about adding a Telepost LP700 to my station but I would need to insert it between the amp and tuner (which are integrated together in the KPA1500). Any ideas if it is worth doing something to loop the RF out of the amp to the coupler and back in again? Probably no easy

[Elecraft] K1-4 low power and poor receive on 40 meters

Hi All, I am going to sell a K1-4 (4 band 40, 30, 20, 15) for the estate of my Elmer. In testing the radio I found 40 meters is about 15dB less sensitivity than 30 and power out about 75 mW. I have double checked the values of components on the filter board to ensure they are correct and

Re: [Elecraft] KPA1500 and noise

Need more details on what your antenna system is and especially what is connected to antenna 1 and 2 on the amp. Any antenna switches, etc. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of w5...@comcast.net Sent: Friday, May 8, 2020 8:28 PM To:

Re: [Elecraft] A broken K3

Great news Dave! Your brother will be happy to get back on the air. Tech support from Elecraft and the users on this group is excellent. Lots of knowledge that they are willing to share. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of David Olean

Re: [Elecraft] Ivory Coast DXpedition

Thanks. Got them first call. Dave wo2x On 2/22/2020 1:46 PM, Lyn Norstad wrote: > TU5PCT Czech DXpedition to the Ivory Coast is burning up 20 meters FT8 > this afternoon on multiple stations. > > > > https://www.cdxp.cz/ > > > > 73 > > Lyn, WØLEN > >

Re: [Elecraft] KPA1500

Sounds like an issue with the power detection circuit on the filter board. I had the 3 watt resistor unsolder itself from the board (it is mounted upside down so gravity helped). I had all kinds of weird power reading issues that were impossible for the input power and current draw. I suggest

Re: [Elecraft] Unexpected K-POD frequency excursions

Peter, Contact Elecraft support on this issue. Sounds like poor grounding/ESD protection. They may have a service bulletin to fix the issue. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Peter Dougherty Sent: Sunday, November 24, 2019 11:56 PM To:

Re: [Elecraft] Reflected power

Check your connections. Loose or poor PL-259s. Also check to see if the antenna is close to something causing it to arc over. I had one antenna that used ladder line with solid conductors. Due to it moving around in the wind one of the conductors developed a break which tested fine under low power

Re: [Elecraft] KPA 500 Attenuated Receive Signals

I had the issue with my 1500 several months ago and it was traced to one of the PIN diodes. Good news is after trip to the left coast for repair and all ECO updates applied the amp has been perfect. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Barry

Re: [Elecraft] KPA 1500 Remote Program V1.27

What I would like to see is ability to control amp from a smartphone, either native app or a web page via login/password. I've been working on the latter using a Raspberry Pi in the shack talking to the amp via Ethernet. It acts as a web server. I have the telemetry working now and next step is

Re: [Elecraft] K4 Field Day report

And if memory serves, it was around 08:30 Eastern yesterday on 14.080 Dave wo2x -Original Message- From: WW3S Sent: Monday, June 24, 2019 5:03 PM To: Dave Cc: David Gilbert ; elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 Field Day report PIE or MIE ? I was at W3MIE, IC-7300,

Re: [Elecraft] K4 Field Day report

Definitely W3PIE I kept sending W3PIE CK LEVELS but guess they didn't know what they were looking at. You could see the spikes across their whole TX passband and noise floor rise. Dave wo2x -Original Message- From: WW3S Sent: Monday, June 24, 2019 5:03 PM To: Dave Cc: David Gilbert ;

Re: [Elecraft] KPA-1500 input too high

Hi Andy I am thinking the reactance the antenna presents to the tuner may have something to do with it. Even though SWR shows about 3.7:1 it may well do with causing the issue. At 3.636 the capacitance is 719 and inductance is 2100. The only band I need a tuner is 80 meters. All other bands are

Re: [Elecraft] KPA-1500 input too high

The input too high only happens into a non-resonant load (tuner in circuit). Also noticed on 20 now when tuner is in operate there is a 3 dB drop in noise floor. This is the second time the 3 watt resistor has desoldered itself from the board and both times the resistor is discolored. Only one

Re: [Elecraft] KPA-1500 input too high

Don, first thing I did. Radio is indeed sending 20 watts on 80 meters. Is a Flex 6600, not capable of 191 watts the amp said it was seeing. The 3 watt, 3k Ohm resistor on the filter board is discolored and one side desoldered itself. This provides RF to the onboard frequency counter. This is

[Elecraft] KPA-1500 input too high

Hi All, KPA-1500 s/n 423 Operating 80 meter SSB running 20 watts drive with tuner engaged for about 1240 watts out PEP. Remote app shows maximum power handling of 1620 watts. Out of nowhere I got an input power too high alarm @ 191 watts! The radio is capable of 100 watts out max and

Re: [Elecraft] Sending AFSK RTTY--FIXED

Pete, YouCAN share the CAT connection from the K3S USB via a program called VSPE. Works very well. Give me a call tomorrow to discuss. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Peter Dougherty Sent: Thursday, March 21, 2019 7:00 PM To: 'Joe

Re: [Elecraft] KPA-1500 failed!

I talked to Peter on the phone. He has no bias current when amp is transmitting with no power applied (key on SSB without talking. He is reading 54 volts and has tried power cycling amp from power supply switch and reseated all cables. Definitely BAD distortion on SSB (we are close enough to

Re: [Elecraft] KPA1500 vs SPE Amps

I have had the SPE 1.3k and now have the KPA1500. I drive them with a Flex 6600 and Anan 7000dle. The issue I had with the SPE 1.3k was once you start pushing it past 1 KW out the TX IMD starts to really get bad. This is due to the single LDMOS RF device being pushed towards its limit. The

[Elecraft] KPA1500 loose 3K Ohm/3 watt resistor

Hi All Went to move the amp today and heard something loose in the PA deck on the KPA1500. I removed the bottom cover to find a 3 K Ohm, 3 watt resistor laying loose to the side of the PA board. There is indication that the resistor has been heated. Checking the resistor with my Fluke 77 shows

Re: [Elecraft] KPA1500 Required Update????

It was sent to the email address I gave them when I ordered my amp. Check your spam filters. I forwarded the email to you. Dave wo2x -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Alan Sewell N5NA Sent: Saturday, January 5, 2019 6:17 PM To: