[Elecraft] KPA1500 5V ERR

Hello Today I received this message. What causes it? thanks -- 73, Jorge CX6VM/CW5W __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] KPA1500 power supply (remote)

On 2022-08-14 08:43, Dick Dievendorff wrote: The KPA1500 power supply container houses several power supplies. Only a small one is on all the time. It can run a microcontroller and switch the larger supplies, but not much else. *** And with good reason. It's hard to switch say 65Amps at 50V (

Re: [Elecraft] KPA1500 power supply (remote)

The KPA1500 power supply container houses several power supplies. Only a small one is on all the time. It can run a microcontroller and switch the larger supplies, but not much else. The 50V and 12v supplies are switched completely off when the amp is “off”. The fans are associated with the

Re: [Elecraft] KPA1500 power supply (remote)

I leave my KPA1500 PS on continuously, whether I'm local or remote. No observed ill effects. When the amp is off, the PS is silent. I haven't measured its current drain in that condition but I expect it is minimal. I have a remote relay box that I could use to key a larger relay in the 230V AC

Re: [Elecraft] KPA1500 power supply (remote)

Hello Lou thanks very much for the information! 73, Jorge El dom, 14 ago 2022 a las 11:13, Lou Laderman () escribió: > Here’s a thread from the Flex Community regarding remote relay setups to > control power to 220v amps with some good ideas. > > >

Re: [Elecraft] KPA1500 power supply (remote)

Here’s a thread from the Flex Community regarding remote relay setups to control power to 220v amps with some good ideas. https://community.flexradio.com/discussion/8023204/remote-220-240vac-switch#latest I built a remote 220v power switch using this relay from Amazon

[Elecraft] KPA1500 power supply (remote)

Hello! when you use the KPA1500 remotely, the power is always on. With which it could spend several years on continuously. Could this be harmful to the power supply? Is it thought and designed to withstand this? Is there a way to turn the power on and off remotely? thanks! -- 73, Jorge

Re: [Elecraft] KPA1500 finals replaced...

It would be useful to know more about the circumstances of these final transistor failures.  I have been running my KPA-1500 for almost three years, contesting, almost always at 1400+ watts, and, fingers crossed, so far it continues to run with my K3 like a 1500-watt transceiver.  I often

[Elecraft] KPA1500 finals replaced...

I have lost the finals twice in my KPA1500 The first was under warrenty (about 6 months) with PA FET, T/R diodes and input attenuator damaged The second was just before the two year mark (finals + LPF PCB assy). In addition, the power supply failed once at about 1.5 years due to a

[Elecraft] KPA1500 repair times

"(hope yours is cheaper than mine.replaced finals..$733 including shipping back to me!)" How did you manage to blow the finals? Are the internal protections of the KPA1500 inadequate in some way? It took quite a bit of testing for me to find out why my KPA500 being shut down when it was

Re: [Elecraft] KPA1500 repair times

Thank you very much for the info - mine arrived on June 28. 73 Dwight NS9I On 8/2/2022 12:01 PM, wa3...@nycap.rr.com wrote: My KAP1500 arrived at Elecraft on June 8 and was shipped back to me July 27. (Should be delivered tomorrow!) I did send notes to support a couple of times asking where

[Elecraft] KPA1500 repair times

My KAP1500 arrived at Elecraft on June 8 and was shipped back to me July 27. (Should be delivered tomorrow!) I did send notes to support a couple of times asking where it was on the queue and each was answered pretty quickly. 73 and good luck (hope yours is cheaper than mine.replaced

[Elecraft] KPA1500 Repair 6-Weeks and waiting

It's been at Elecraft for 6-weeks, and sadly, not a single word on it's status, out of anyone! 73 Dwight NS9I __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

[Elecraft] KPA1500 - loose hardware on return from repair

When I received my KPA-1500 back from repair, the repair was done very well but disappointingly, the reassembly had 2 loose screws; fortunately the were only on the cover and still in but needed tightening - they were barely started in the holes... Another disappointment in the process was

Re: [Elecraft] KPA1500/PS SPACING

My boyhood neighbor and "Elmer", Lee, W7UVR (see my QRZ page) fell into a trust fund income and had all of the toys.  He enlisted a local ham, who was a tool and die maker and great builder of equipment, to build the mechanicals of a CW rig using a Geloso VFO driving an HK57. I begged him to

Re: [Elecraft] KPA1500/PS SPACING

Thanks for the responses. The KPA1500 manual says just 1" on the sides of the RF deck and PS is adequate, so I think I'll be OK--as will my HW-16. 73 Eric WD6DBM On Sat, Jul 2, 2022, 6:01 PM jerry wrote: > On 2022-07-02 15:35, Jim Brown wrote: > > > > I bought my first amp in 2004. > > ***

Re: [Elecraft] KPA1500/PS SPACING

On 2022-07-02 15:35, Jim Brown wrote: I bought my first amp in 2004. *** And I built my first amp in 1971. It was a Command set transmitter chassis stuffed with 4 6LQ6's. The roller coil served as the inductor in the output Pi network. I remember 15 meters was something like an 8th of a

Re: [Elecraft] KPA1500/PS SPACING

Call you, and raise you an AT-1 (along with an S38D too). 73, Pete N4ZR Check out the new Reverse Beacon Network web server at . For spots, please use your favorite "retail" DX cluster. On 7/2/2022 6:35 PM, Jim Brown wrote: On 7/2/2022 1:58 PM, Wes wrote: Hard

Re: [Elecraft] KPA1500/PS SPACING

It is a Heathkit transceiver - you can own one if you wish:) https://www.ebay.com/itm/185435021038?hash=item2b2cc9deee:g:wKEAAOSwH8xiiPiy John KK9A Jim Brown K9YC wrote: Eric, I don't know what an HW-16 is. The PSU for my KPA-1500 sits on a shelf below it. The limitation is the length of the

Re: [Elecraft] KPA1500/PS SPACING

On 7/2/2022 1:58 PM, Wes wrote: Hard to believe.  A man of your age and experience. My experience was earlier, with an Apache, and later a TV. And there were a DX100 and SX101 that an older ham loaned me because he couldn't pass the 13 wpm code test. Before that, it was a couple of Command

Re: [Elecraft] KPA1500/PS SPACING

Wes, don't be like that. You do that, and people get afraid to ask questions, and we miss an opportunity to pass on knowledge. Randall Munroe has a good take on this: https://xkcd.com/1053/ For those who are curious, the HW-16 is a HeathKit CW rig covering (part of) 80, 40, and 15 meters. I'm

Re: [Elecraft] KPA1500/PS SPACING

Hard to believe.  A man of your age and experience. On 7/2/2022 12:16 PM, Jim Brown wrote: I don't know what an HW-16 is. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] KPA1500/PS SPACING

On 7/2/2022 3:18 AM, eric norris via Elecraft wrote: I am considering a new shack layout that would place on a single shelf, in left to right order, KPA1500 RF DECK--HW-16--KPA1500 PS.  My question for the brain trust is:  How much space is required between components? Eric, I don't know

[Elecraft] KPA1500/PS SPACING

Gangue: I am considering a new shack layout that would place on a single shelf, in left to right order, KPA1500 RF DECK--HW-16--KPA1500 PS.  My question for the brain trust is:  How much space is required between components?  The PS cannot go on the floor at this point.  The KPA1500 and HW-16

[Elecraft] KPA1500 segment SWR memory

Hello I read that KPA1500 have a memory to recognize SWR of the antennas on different frequencies What happen if the antenna vary SWR periodically? My warc dipole vary SWR, usually I have 1.5:1 on 18070, but today (raining day) SWR is 1.17:1 Is this a problem for KPA1500? Thanks for the

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

Disclaimer: OK the title is about the KPA1500; Elecraft advice probably extends to all their amps. KL7UW *** "You should be running fans full-speed under those conditions if you want it to live long! " Please share any data you have that supports any claim than running continuous full fan

[Elecraft] KPA1500 reduces power as it gets warmer?

of Kevin Robertson via Elecraft Sent: Saturday, June 4, 2022 6:52 AM To: Rick NK7I Cc:elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 reduces power as it gets warmer? FT8 is a weak signal mode, designed for low power. Given its high duty cycle, you are asking for trouble if yo

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

The engineer that created the amp recently said that you should let the amp handle the fans.  It should be in the archives here on this list. W0MU On 6/6/2022 9:52 AM, Andy Durbin wrote: "You should be running fans full-speed under those conditions if you want it to live long!" Please share

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

"You should be running fans full-speed under those conditions if you want it to live long! " Please share any data you have that supports any claim than running continuous full fan on any Elecraft amplifier has any advantage over letting the firmware control the fans based on PA temperature.

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

It’s actually better than that. FT8 only transmits for 12.6 seconds giving a duty cycle of 42%. The 7.4 seconds left over are used for decode so you can have an answer to send in the next transmit slot. 73 Bill AE6JV > On Jun 5, 2022, at 11:18:23, Ken K6MR wrote: > > Worst case duty cycle

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

n.qth.net > on behalf of Kevin Robertson via Elecraft > Sent: Saturday, June 4, 2022 6:52 AM > To: Rick NK7I > Cc: elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA1500 reduces power as it gets warmer? > > FT8 is a weak signal mode, designed for low power. Given i

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

lecraft Sent: Saturday, June 4, 2022 6:52 AM To: Rick NK7I Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 reduces power as it gets warmer? FT8 is a weak signal mode, designed for low power. Given its high duty cycle, you are asking for trouble if you operate your power amplifie

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

Slight drop (10%) in output with warming is normal for most solid-state amps. Having fans run full speed might counter that, slightly. Drop from 1500 to 1350 is 0.5 dB in signal (which is likely only noticeable if you are running a marginal propagation path (like eme). In fact that is not

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

At high power the KPA1500 is the most efficient. At lower power it will generate the same internal heat or more. John KK9A Kevin Robertson KD2WCY FT8 is a weak signal mode, designed for low power. Given its high duty cycle, you are asking for trouble if you operate your power amplifier in FT8

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

On 6/4/2022 6:52 AM, Kevin Robertson via Elecraft wrote: FT8 is a weak signal mode, designed for low power. As others have observed, that is WRONG. Given its high duty cycle, you are asking for trouble if you operate your power amplifier in FT8 mode using your KPA1500 at anywhere near high

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

: [Elecraft] KPA1500 reduces power as it gets warmer? FT8 is a weak signal mode, designed for low power. Given its high duty cycle, you are asking for trouble if you operate your power amplifier in FT8 mode using your KPA1500 at anywhere near high power. I burned out my final on my K2 at 15 watts

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

It isn't "designed for low power."  I don't, nor will I have, a KPA1500, but I run my KAT500 at 400-500 W on FT8 without incident. Wes  N7WS On 6/4/2022 6:52 AM, Kevin Robertson via Elecraft wrote: FT8 is a weak signal mode, designed for low power. Given its high duty cycle, you are asking

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

It is a weak signal mode, not necessarily a low power mode. If a station you need for new country is -24 and is running 1500 watts then most likely he will not hear you at low power. You will need to run QRO. Use the power needed to make the contact. Dave wo2x Sent from my waxed string and

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

FT8 is a weak signal mode, designed for low power. Given its high duty cycle, you are asking for trouble if you operate your power amplifier in FT8 mode using your KPA1500 at anywhere near high power. I burned out my final on my K2 at 15 watts on FT8. 73, Kevin Robertson KD2WCY > On Jun 4,

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

On 6/3/2022 9:41 PM, Rick NK7I wrote: Yes, the KPA1500 will drop 10% of the output, as it warms up. 1500 drops to 1350, so you have to compensate with the drive. But DON'T do that on 6M with keydown modes, where the efficiency is lowest. 73, Jim K9YC

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

On 6/3/2022 9:22 PM, David F. Reed wrote: I note my KPA1500 drops power at its temperature rises... Elecraft engineer (and neighbor) K6XX told me that it's a characteristic of the output devices. 73, Jim K9YC __ Elecraft mailing

Re: [Elecraft] KPA1500 reduces power as it gets warmer?

Yes, the KPA1500 will drop 10% of the output, as it warms up. 1500 drops to 1350, so you have to compensate with the drive. I'm told this is typical of all solid state finals (my KPA500 did likewise). If you're running the station remotely; bump up the fan speed to slow the drop (or wear

[Elecraft] KPA1500 reduces power as it gets warmer?

I note my KPA1500 drops power at its temperature rises... Using FT8, so a relatively high duty cycle. Say I start at a heat sink temperature of 27 C, and 1,000 watts out; by the time the temperature is at 65 C, the power has dropped to 893 watts out. I have a couple of questions about this

Re: [Elecraft] KPA1500 Low Gain Fault and then distorted output

I have no knowledge regarding repairing your KPA1500. The KPA1500 is very inefficient at the power levels that you are using which may be causing your RF deck failures. Perhaps the KPA500 would be better suited? John KK9A wa3afs wrote: Does not look very promising. First, I

[Elecraft] KPA1500 Low Gain Fault and then distorted output

Does not look very promising. First, I experienced 2 back to back OVR 61 - LOW GAIN freq 10120 inp 7W fwd 40W refl 2W swr 1.5 9A 23C adc169 power ratio 6 and then a single FLT 61 - - LOW GAIN freq 10120 inp 7W fwd 40W refl 2W swr 1.5 9A 23C adc169 power ratio 6 After that no error

[Elecraft] KPA1500 slow return shipment from repair

A buddy of mine (KW4YA) was waiting for a tracking # for his amp that was supposed to ship Monday. He called and found out today that the return shipment was overlooked. I had an instance a while back when my KPA1500 was returned from repair and the power supply was forgotten in the shipment.

Re: [Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error.

- Paul KW7Y -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Roy Sent: Wednesday, May 11, 2022 9:57 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error. Check your idling current -- should be stable at about 2

Re: [Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error.

Check your idling current -- should be stable at about 2 amps. 73,  Roy  K6XK Over the last couple of weeks, I have an intermittent problem with the amp. On a number of occasions, I have received a LOW GAIN error message. The output drops from 1400W to a few hundred watts or less as confirmed

Re: [Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error.

I had problems at one point due to the 3 watt resistor on the filter board desoldering itself causing the amp to have errors. The RF deck went back to Elecraft and Renee got it repaired. There were also a few hardware updates done while it was back for a visit in Watsonville. I don’t think

[Elecraft] KPA1500, 4 years old, Intermittent LOW GAIN error.

Over the last couple of weeks, I have an intermittent problem with the amp. On a number of occasions, I have received a LOW GAIN error message. The output drops from 1400W to a few hundred watts or less as confirmed in the logging file and my external power meter The problem can go away for a few

Re: [Elecraft] KPA1500 fan sequencing

an.qth.net Subject: [Elecraft] KPA1500 fan sequencing Is it normal for only the middle fan to run on the KPA1500 in Level 1? expected all three fans to run, and simply increase speed as needed to efficiently (and quietly) provide the necessary cooling. All three fans do run in Levels 2-5. Is this no

[Elecraft] KPA1500 fan sequencing

Is it normal for only the middle fan to run on the KPA1500 in Level 1? expected all three fans to run, and simply increase speed as needed to efficiently (and quietly) provide the necessary cooling. All three fans do run in Levels 2-5. Is this normal? 73, John, N3AM

Re: [Elecraft] KPA1500 gain jumping on 160

a bad cap in the feedback loop. I suggest you call Elecraft and ask to talk to Rene Morris about it. 73, Dale AA1QD -Original Message- From: Steve Masticola [mailto:steve.mastic...@verizon.net] Sent: Wednesday, April 06, 2022 2:56 PM To: elecraft@mailman.qth.net Subject: [Elecraft

Re: [Elecraft] KPA1500 gain jumping on 160

Steve, A good start would be to redo the K3 TX GAIN CALIBRATION.  Do not use the Utility, do it manually.  This problem can occur as a result of varying drive from the K3, typically from previously transmitting at either 5 or 50 watts.  Using your dummy load, set the K3 PWR to 5w.  In

[Elecraft] KPA1500 gain jumping on 160

Has anyone else seen the kind of gain jumping on 160 shown here? https://www.youtube.com/watch?v=LjfksHwLz9w The exciter is a K3, and I generated the drive signal by putting it into TUNE mode. The KPA1500 is feeding directly into a dummy load, so the antenna, etc. is not the cause. I believe I

[Elecraft] [KPA1500] Odd power up behavior

Thanks for sharing your experiences, Warren. I've added your email to my database. Bob NN5D __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

[Elecraft] [KPA1500] Odd power up behavior

I thought I'd mention this to the list as it took a while to sort out.  Fortunately, the resolution was simple. When powering up the KPA1500 last week, it spit out some 50V power supply faults and refused to start up.  In doing so, the amplifier panel indicators did some nasty flash-dance

Re: [Elecraft] KPA1500 wattmeter adjustment

I would guess most RF power meters are lucky to be within 5% accuracy of full scale. As a comm tech in the 2-way commercial industry, the Bird43 is pretty much a standard field instrument for measuring power and reflected power (to check SWR on cables, antennas, filters, etc.). If you want

Re: [Elecraft] KPA1500 wattmeter adjustment

If you dig into the QST reviews, you'll find out that the LP100 did not quite meet its spec of 5% accuracy on all bands at all power levels and modes. But then, neither did the LP500 nor the W2. The old Array Solutions Powermaster II came closer than any of those three. it was within 5%

Re: [Elecraft] KPA1500 wattmeter adjustment

Having taught in a number of ham crams, I am aware that there are many individual ways of learning. For me, knowing the theory is basic. I know such factoids as E=IR, P=EI, 1 meter is 40 inches (useful for the length of a 2M antenna). Others just memorize the answers. I also have to memorize

Re: [Elecraft] KPA1500 wattmeter adjustment

ated 1.1:1, there will be differences due to difference line complex impedance's. 73 Bob, K4TAX On 2/6/2022 9:51 AM, elecraft-requ...@mailman.qth.net wrote: Message: 15 Date: Sat, 5 Feb 2022 14:53:59 -0600 From: Ronnie Hull To: Dick Dievendorff Cc:Elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500

Re: [Elecraft] KPA1500 wattmeter adjustment

I don’t think the point was the technical discussion. It was more likely that, as written: > Did we forget about how to use Ohms Law? Seems so. Or perhaps we never > knew to start with. The reasonable interpretation is that the writer implied that some sub-set of the ham population “never

Re: [Elecraft] KPA1500 wattmeter adjustment

On 2/6/2022 11:18 AM, Ronnie Hull wrote: One in every crowd… why do we have to throw rocks at each other Why must technical discussions be viewed as adversarial? Bob is NOT "throwing rocks," he is sharing what he's learned over his life as a technical professional. As a young ham, I

Re: [Elecraft] KPA1500 wattmeter adjustment

On 2/6/2022 11:14 AM, Bob McGraw wrote: The instrument also costs in the neighborhood of $500+. Have you priced a Bird 43 recently? A new one without an element will set you back about $450, used about $275. Expect to pay $100 - $200 for a new slug, and depending on frequency and power

Re: [Elecraft] KPA1500 wattmeter adjustment

es due to >>difference line complex impedance's. >> >>73 >> >>Bob, K4TAX >> >> >>On 2/6/2022 9:51 AM, elecraft-requ...@mailman.qth.net wrote: >>> Message: 15 >>> Date: Sat, 5 Feb 2022 14:53:59 -0600 >>

Re: [Elecraft] KPA1500 wattmeter adjustment

00 > From: Ronnie Hull > To: Dick Dievendorff > Cc:Elecraft@mailman.qth.net <mailto:cc%3aelecr...@mailman.qth.net> > Subject: Re: [Elecraft] KPA1500 wattmeter adjustment > Message-ID: > Content-Type: text/plain; charset=utf-8 > > Lucky your tha

Re: [Elecraft] KPA1500 wattmeter adjustment

On 2/6/2022 10:59 AM, N2TK via Elecraft wrote: 3-5% is fine in my book. As an engineer who has worked in manufacturing, I consider that a fine performance spec. Note that it is 3% typical, 5% worst case, of the READING, whereas for Bird, it's 5% of full scale, and the LP100A probes are

Re: [Elecraft] KPA1500 wattmeter adjustment

book. 73,N2TK, Tony -Original Message- From: Mark Goldberg To: Bob McGraw Cc: Elecraft Mailing List Sent: Sun, Feb 6, 2022 1:47 pm Subject: Re: [Elecraft] KPA1500 wattmeter adjustment The only way to really know for sure is to have a NIST traceable calibrated wattmeter and have

Re: [Elecraft] KPA1500 wattmeter adjustment

gt; > Date: Sat, 5 Feb 2022 14:53:59 -0600 > > From: Ronnie Hull > > To: Dick Dievendorff > > Cc:Elecraft@mailman.qth.net > > Subject: Re: [Elecraft] KPA1500 wattmeter adjustment > > Message-ID: > > Content-Type: text/plain; charset=utf-8 > > > > L

[Elecraft] KPA1500 wattmeter adjustment

l To: Dick Dievendorff Cc:Elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 wattmeter adjustment Message-ID: Content-Type: text/plain; charset=utf-8 Lucky your that close! My K3, P:, Lp100 and kpa1500 are all wa different. I accept the LPA100 as being correct!

Re: [Elecraft] KPA1500 wattmeter adjustment

if anyone wants a copy of my results let me know.73N2TK, Tony -Original Message- From: Dick Dievendorff To: tony@verizon.net Cc: elecraft@mailman.qth.net Sent: Sat, Feb 5, 2022 3:11 pm Subject: Re: [Elecraft] KPA1500 wattmeter adjustment If you turn in the Tech Mode

Re: [Elecraft] KPA1500 wattmeter adjustment

Lucky your that close! My K3, P:, Lp100 and kpa1500 are all wa different. I accept the LPA100 as being correct! Ron W5SUM Sent from my iPhone > On Feb 5, 2022, at 2:11 PM, Dick Dievendorff wrote: > > If you turn in the Tech Mode menu item, there is a WMTR ADJUST menu item > that might

Re: [Elecraft] KPA1500 wattmeter adjustment

If you turn in the Tech Mode menu item, there is a WMTR ADJUST menu item that might be easier to use than the command tester commands. 73 de Dick, K6KR > On Feb 5, 2022, at 10:33, N2TK via Elecraft wrote: > > If I measure the power out on my K3 (set to 100W), P3, LP-100 and KPA1500 >

[Elecraft] KPA1500 wattmeter adjustment

If I measure the power out on my K3 (set to 100W), P3, LP-100 and KPA1500 (power on but in standby), they all read quite close on 10-160M into a dummy load. On 6M the P3 reads 16% higher than the other three. If I use 20W drive from the K3 and put the KPA1500 in operate mode, the P3 and LP-100

Re: [Elecraft] KPA1500 problem

relay that is bad. I do need to get it fixed, Larry k6ro -Original Message- From: Andy Durbin Sent: Monday, January 17, 2022 7:20 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 problem "No, RX audio just appears greatly attenuated - acting like the antenna is di

Re: [Elecraft] KPA1500 Remote Software Question

> > Sent from Mail for Windows > > From: Ken K6MR > Sent: Sunday, January 30, 2022 7:28 PM > To: Ed G; elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA1500 Remote Software Question > > I don't remember the slider ever moving in response to the fan speed while &g

Re: [Elecraft] KPA1500 Remote Software Question

Thanks Ken. I could easily be mis-remembering! --Ed, N3CW— Sent from Mail for Windows From: Ken K6MR Sent: Sunday, January 30, 2022 7:28 PM To: Ed G; elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 Remote Software Question I don't remember the slider ever moving in response

Re: [Elecraft] KPA1500 Remote Software Question

, January 30, 2022 1:29 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA1500 Remote Software Question Folks, Using the KPA1500 remote program. There is a slider control for the fan just below the temp bargraph. I can manually adjust the slider to give me different fan speeds, so

Re: [Elecraft] KPA1500 Remote Software Question

Neighbor and serious contester K6XX was the engineer who put both of their amps into production. He borrowed my KPA1500 for a contest after he lost everything in a major wildfire. He told me my fans were super dirty with dust, because I was running them at far higher speed than necessary to

[Elecraft] KPA1500 Remote Software Question

Folks, Using the KPA1500 remote program. There is a slider control for the fan just below the temp bargraph. I can manually adjust the slider to give me different fan speeds, so the control is communication with the KPA1500. I seem to remember when I first installed the remote

Re: [Elecraft] KPA1500 problem

I have the similar problem with one of my 1500 amps. Elecraft says it is a relay that is bad. I do need to get it fixed, Larry k6ro -Original Message- From: Andy Durbin Sent: Monday, January 17, 2022 7:20 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 problem "N

Re: [Elecraft] KPA1500 problem

"No, RX audio just appears greatly attenuated - acting like the antenna is disconnected. There is still the ambient hiss from the K3 speaker." Isn't that exactly what you would expect to hear if the amplifier was spuriously keyed but the K3 was not keyed? All it would take is a faulty keying

Re: [Elecraft] KPA1500 problem

Hi Andy, No, RX audio just appears greatly attenuated - acting like the antenna is disconnected. There is still the ambient hiss from the K3 speaker. The symptom reminds me of a problem I has with my Alpha 86 that ended up being a dirty T/R relay. He’s close to end of warranty so he probably

[Elecraft] KPA1500 problem

"A buddy of mine is having a problem with his KPA1500 where the receive path is cutting out intermittently when he switches to OPER. It comes back when he switches back to STBY. This occurs occasionally, sometime it works fine. Any comments?" Does the "keyed" indicator change at the same time

[Elecraft] KPA1500 problem

A buddy of mine is having a problem with his KPA1500 where the receive path is cutting out intermittently when he switches to OPER. It comes back when he switches back to STBY. This occurs occasionally, sometime it works fine. Any comments? 73, Bill WE5P Comfortably Numb

Re: [Elecraft] KPA1500 reflected power faults

Problem found. It was an intermittent fault on a bidirectional coupler for a wattmeter. It finally failed hard. When I took the coupler out of circuit, the amp behaved itself. 73, -Steve WX2S On Tuesday, January 11, 2022, 11:33:44 AM EST, Steve Masticola wrote: Hi, all, My KPA1500

Re: [Elecraft] KPA1500 reflected power faults

Steve:  I went through this exact problem until K6XX alerted me to the likely cause of corrupt  TXGAIN calibration.  This was discussed recently and reaffirmed by Elecraft on this reflector.  Most likely the problem originates from transmitting with either 5 or 50 watts with the K3, which

Re: [Elecraft] KPA1500 reflected power faults

Is it possible that something is heating or arcing in the device you are using to match your 43 ft vertical? John KK9A Steve Masticola WX2S Hi, all, My KPA1500 is throwing a lot of reflected power faults at power levels above 500 watts. The symptom is that the output power (as indicated by

Re: [Elecraft] KPA1500 reflected power faults

On 1/11/2022 8:33 AM, Steve Masticola via Elecraft wrote: I know the usual culprits (poor ground, RF in the shack, surge suppressors), but I wonder if other owners are still having these problems, despite attempts to fix. I have grounding and bonding done right, no issues at all like this.

[Elecraft] KPA1500 reflected power faults

Hi, all, My KPA1500 is throwing a lot of reflected power faults at power levels above 500 watts. The symptom is that the output power (as indicated by the power LEDs) zooms up and then the amp faults. An external MB-1 power meter indicates 2000 watts or more peak output when this happens. I

[Elecraft] KPA1500 does not power up - FAULT 5V SUPPLY

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[Elecraft] KPA1500 Fault: 5V Supply 0.0 Volts...back again this morning

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[Elecraft] KPA1500 Fault: 5V Supply 0.0 Volts

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[Elecraft] KpA1500 output

Hi all, Had a falt on amp (swr) pushed reset corrected swr and now get no output. Seams like reset not working. Any suggestions? Sent from my iPhone __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] KPA1500 cyclic macros?

On Tue, Oct 26, 2021 at 8:43 PM eric norris via Elecraft < elecraft@mailman.qth.net> wrote: > There has been some discussion on the KX group reflector of cyclic macros > for the KX3. > My question is, would this work on the KPA1500? Could a single macro be > written for a PF key that would cycle

[Elecraft] KPA1500 cyclic macros?

There has been some discussion on the KX group reflector of cyclic macros for the KX3. My question is, would this work on the KPA1500?  Could a single macro be written for a PF key that would cycle through the various fan speeds? P.S.  Thank you ALL for your suggestions in re my XFINITY/COMCAST

Re: [Elecraft] KPA1500 Power Level

On 9/23/2021 6:34 AM, Lyn Norstad wrote: Yes, there are many reasons to match as well as possible Elecraft engineer K6XX has shown that it is critical to match antennas to the output devices to minimize IMD (clicks, splatter). In tube amps, this is done by a variable pi or pi-L network; with

Re: [Elecraft] KPA1500 Power Level

PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 Power Level "Would you care to share your KPA500 power measurements at each of those drive levels (and test mode used)?" If you receive this data set be sure you understand that dissipation, heating, and efficiency will b

[Elecraft] KPA1500 Power Level

The answer to Lyn's question was via a private response with attached EXCEL file.   That file is available except it "won't take" here on the discussion group. 73 Bob, K4TAX Date: Wed, 22 Sep 2021 14:14:47 -0500 From: "Lyn Norstad" To: "'Bob McGraw'", S

Re: [Elecraft] KPA1500 Power Level

"Would you care to share your KPA500 power measurements at each of those drive levels (and test mode used)?" If you receive this data set be sure you understand that dissipation, heating, and efficiency will be strongly dependent on the complex impedance of the load. I have previously shared

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