Re: [Elecraft] KPA500 Clicking Noise

Ah, yes, I sure did. Sorry about that. Got it now.Dana On Mon, Sep 20, 2021 at 5:12 PM Bill Weaver wrote: > I believe you missed his sarcasm :) > > 73, > Bill WE5P > > Comfortably Numb > > > On Sep 20, 2021, at 20:03, Dana Roode K6NR wrote: > > > > Thanks for the suggestion to search for

Re: [Elecraft] KPA500 Clicking Noise

I believe you missed his sarcasm :) 73, Bill WE5P Comfortably Numb > On Sep 20, 2021, at 20:03, Dana Roode K6NR wrote: > > Thanks for the suggestion to search for other discussions of this, hadn't > occurred to me. I did some searches and everything I read suggests the > clicking is harmless

Re: [Elecraft] KPA500 Clicking Noise

Thanks for the suggestion to search for other discussions of this, hadn't occurred to me. I did some searches and everything I read suggests the clicking is harmless. Elecraft can supply a new "Z bracket" to correct the problem. It's even mentioned in the manual it turns out. Am I missing somet

Re: [Elecraft] KPA500 Clicking Noise

"but after it warms up - 40 degrees C or so - I start to hear a faint clicking noise." You should stop using it. There is clearly something seriously wrong. All KPA500 should make a loud, not faint, clicking noise as they heat and cool. (I suppose I shall have to explain that much has been wr

[Elecraft] KPA500 Clicking Noise

I hadn't used my KPA500 for awhile, but I put it on the air recently. It's working fine with my K3, but after it warms up - 40 degrees C or so - I start to hear a faint clicking noise. It is coming from the vicinity of the fan and heat sinks. There is a click every 10 seconds or so, I think whet

Re: [Elecraft] KPA500 270V Failure

Thanks to the 2 people who replied. Thanks to Keith VE7KW who had R16 (100 Ohm) SMD resistor fail on his PS board in his KPA500. I had the same problem here. R16 tested open. It does not appear to be cracked or burnt, just a failure. R16 appears to be a resistor that feeds the voltage multiplier ci

Re: [Elecraft] KPA500 270V Failure

com Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 270V Failure OK, I see what you're saying now. I might have 2 problems. 1 or more diodes in the PS board and the TR switching diodes. I will make the check you stated. Thanks for the tip. Bruce, WB6IZG On Sat, Jul 24, 2

Re: [Elecraft] KPA500 270V Failure

t; Moderator – North American QRO Group at Groups.IO. > > email: b...@wjschmidt.com > > > -Original Message- > From: Dr. William J. Schmidt > Sent: Saturday, July 24, 2021 10:35 PM > To: 'Bruce Forsberg' ; 'elecraft@mailman.qth.net > ' > >

Re: [Elecraft] KPA500 270V Failure

  b...@wjschmidt.com -Original Message- From: Dr. William J. Schmidt Sent: Saturday, July 24, 2021 10:35 PM To: 'Bruce Forsberg' ; 'elecraft@mailman.qth.net' Subject: RE: [Elecraft] KPA500 270V Failure This happens a lot... search the forum for past msgs. It's not the

Re: [Elecraft] KPA500 270V Failure

up at Groups.IO. email:  b...@wjschmidt.com -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Bruce Forsberg Sent: Sunday, July 25, 2021 4:31 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] KPA500 270V Failure Today when using my KPA500 I switched it into op

[Elecraft] KPA500 270V Failure

Today when using my KPA500 I switched it into operate mode from standby and received an error message of 270V ERR. This is the first time I have seen this error. I partially disassembled the amplifier and measured the 270V voltage and it is 70V, which is close to what the HV voltage measured on the

Re: [Elecraft] KPA500 and excessive drive

You likely blew one of the Caps in the Low Pass filter. If you open it up and have a look, you will clearly see the damage. I've seen this done before on a friends that I had to repair for him. I just replaced the blown parts and then swept it with a VNA to ensure it was still operational. Mike

[Elecraft] KPA500 and excessive drive

Last night I was trying to work 80m for the first time in a while, and my KPA500 faulted. I was tired, and didn't pay attention to the fault code but simply cleared it and tried again. After a couple of rounds of this, I smelled something burning and shut off the amp for the night. This morning

[Elecraft] KPA500 TR switch mod kit

"Does this exist and what does it consist of ?? " Maybe some answers here: http://ok1rp.blogspot.com/2017/02/elecraft-kpa500-lpf-tr-switch-rework.html 73, Andy, k3wyc __ Elecraft mailing list Home: http://mailman.qth.n

Re: [Elecraft] KPA500 TR switch mod kit

You might be referring to this from an Elecraft repair invoice: "Replaced Q5, D7, R3, R9 and R24 for Transmit/Receive MOD (Improves robustness in Transmit/Receive circuitry)." My KPA500 was back to the factory in March and had this mod installed. That didn't help much in the "robust" department,

[Elecraft] KPA500 TR switch mod kit

I saw in archives that there is a KPA500 TR switch mod kit - I cant find it on the Elecraft parts web site .My KPA is circa 7/2014 . Does this exist and what does it consist of ?? Hank K7HP __ Elecraft mailing list Home: http://mail

Re: [Elecraft] KPA500 with Icom 7300

Thanks Ken. Your advice is helpful. I have set the transmit delay to 15ms. I have found lots of info on using the IC7300 with the KAT500/KPA500 combination but none on using the setup that I have, ie., IC7300 exciter, to KPA500 with LDG AT-1000 Pro II autotuner. I will make sure that I don't pum

Re: [Elecraft] KPA500 Power Entry Module

Thank you Walter, I'll give it a try. 73 Tom AA4VV On 6/13/2021 1:50 PM, Walter Underwood wrote: You should be able to order it here. https://elecraft.com/pages/parts-order-form wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org

Re: [Elecraft] KPA500 Power Entry Module

You should be able to order it here. https://elecraft.com/pages/parts-order-form wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Jun 13, 2021, at 10:41 AM, Tom Berry wrote: > > Does anybody know where I can get

[Elecraft] KPA500 Power Entry Module

Does anybody know where I can get a power switch for the KPA500. It's the power switch on the back of the amp. Elecraft part number (Main Power Entry Module (Corcom)) E620184. I have emailed Elecraft with no response. Thanks Tom AA4VV

[Elecraft] KPA500/KAT500 With a Yaesu FTDX10

If you are using a Yaesu FTDX10, especially with a KPA500 and KAT500, please get in touch. Richard Kunc W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: ma

Re: [Elecraft] KPA500 receive loss

Hi 😉 -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Dr. William J. Schmidt Sent: Samstag, 5. Juni 2021 18:02 To: 'Elecraft Mail List' Subject: Re: [Elecraft] KPA500 receive loss I'm sure you could invent many ways to protect these parts (ga

Re: [Elecraft] KPA500 receive loss

This doesn’t really have the signature of pin-diode failure. When the pin diodes fail you generally get major signal loss across all bands. The description simply does not match that diagnosis. I would ask for further information: * Is there any change in 160m transmit operation (change in drive

Re: [Elecraft] KPA500 receive loss

Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Andy Durbin Sent: Saturday, June 5, 2021 8:20 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA500 receive loss There was a similar report fairly recently. I copied this to my KPA500 notes: "Reported problem(s): Re

Re: [Elecraft] KPA500 receive loss

craft Mail List Subject: Re: [Elecraft] KPA500 receive loss Would a gas discharge tube save the sensitive parts? David G3UNA > On 05 June 2021 at 16:20 "Dr. William J. Schmidt" wrote: > > > This happened with my backup amp at the contest station on J6. I left > it c

Re: [Elecraft] KPA500 receive loss

Would a gas discharge tube save the sensitive parts? David G3UNA > On 05 June 2021 at 16:20 "Dr. William J. Schmidt" wrote: > > > This happened with my backup amp at the contest station on J6. I left it > connected by accident overnight (too much rum) and we had some static > storms. Took o

Re: [Elecraft] KPA500 receive loss

email:  b...@wjschmidt.com -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Andy Durbin Sent: Saturday, June 5, 2021 8:20 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA500 receive loss There was a similar report fairly recently. I copied this to my KPA500

[Elecraft] KPA500 receive loss

There was a similar report fairly recently. I copied this to my KPA500 notes: "Reported problem(s): Receive signal is attenuated when in operate. Receive signal is normal when in standby. Problem(s) found: Confirmed problem. Found that D8, D9 and R7 in the T/R circuit had failed. Repair(s) perf

[Elecraft] KPA500 receive loss

Just noticed this evening that on 160 I lose about 6 dB of rx level (noise and signal ) when I go from STDBY to OPER. On 40 maybe a dB or so , on 20 no change -- On160 almost always am using RX antenna so am not going thru the KPA but this evening had Tx ant on RX . Maybe has always been that

Re: [Elecraft] KPA500 with Icom 7300

Steven, I use a KPA500 (and KAT500 tuner) with both an IC-7300 and an IC-7610. Both have the transmit delay set for 15ms. The amp is keyed directly from either rig using RCA/RCA cables from the SEND jack to the amp's keying jack. I do not use a keying line buffer between the amp and either rig. Th

[Elecraft] KPA500 with Icom 7300

I am running an Icom 7300 with an LGD tuner. Putting together the KPA500 kit. Can anyone with same setup give me advice on cable hookups between radio and amp? Are there any IC 7300 settings required? Yes, I have the manuals. Thanks, Steve AD4K _

Re: [Elecraft] KPA500 cabinet buzz

__ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: ht

Re: [Elecraft] KPA500 cabinet buzz

I didn't say " a hair's width," I said "a hair," a technical term understood by OFs as an approximation. I also didn't say "pinch the ribbon cable," because that is not the side of the cabinet where the problem lies in my experience. Now, are you guys telling me there is an actual wing-nut on the

[Elecraft] KPA500 cabinet buzz

"The KPA-500 transformer should be more than just a "hair" away from sides (step 6 above) as there are rubber bumpers and a ribbon cable between that should NOT be pinched. " Over the production life of the KPA500 the transformer design, and perhaps the supplier, have changed several times. Th

[Elecraft] KPA500 cabinet buzz

-- Forwarded message - From: Mike Flowers Date: Sat, May 29, 2021 at 11:11 PM Subject: Re: [Elecraft] KPA500 cabinet buzz Hi Mark, I’d verify this with Elecraft Support. When I got my KPA500 it was used and shipped with the transformer in a separate box. The assembly manual

Re: [Elecraft] KPA500 cabinet buzz

The KPA-500 transformer should be more than just a "hair" away from sides (step 6 above) as there are rubber bumpers and a ribbon cable between that should NOT be pinched.  Refer to Kit Assembly Instructions page 35 and figure 52. Mike AC5P On Sunday, May 30, 2021, 07:29:59 AM CDT, Eric Nor

Re: [Elecraft] KPA500 cabinet buzz

There is KPA500 buzz (normal), and KPA500 BUZZ (abnormal). I own two. KPA Numero Uno was bought way back when, when the kits were first available. When I first built it, it buzzed something akin to to your teeth clacking when you notice a full-grown T. Rex is standing next to you. At that time,

Re: [Elecraft] KPA500 cabinet buzz

Mark: I have this same issue with my KPA500, connected to my K3S via AuxIO cable. It's been that way since new from Elecraft. It sounds like the AC transformer vibrating against the cabinet? It's the same on different bands and power levels. I've just never had the time to research the problem.

Re: [Elecraft] KPA500 cabinet buzz

After much searching, this 2.4 year old thread is the only info I can find on this issue. I bought a factory built KPA500 a few months ago and mine buzzes on CW key down. Af first I thought maybe this is normal as I never owned an HF amp. Now I think it is a problem. Any know how to fix this? I c

Re: [Elecraft] KPA500-KAT500 tuning settings

Why is it obvious?  Actually, I don't. I have a tri-band Yagi that I also tune for 12 and 17.  So each band has a different tuning solution, which has nothing to do with a different antenna spigot.  And note I said, "for instance", i.e. for example. K3WYC has pointed out the pitfall of relying

[Elecraft] KPA500-KAT500 tuning settings

-0500 From:j...@kk9a.com To:elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500-KAT500 tuning settings Message-ID: <20210510102648.horde.fifed99krxeyvdjgdpfd...@www11.qth.com> Content-Type: text/plain; charset=utf-8; format=flowed; DelSp=Yes So you obviously have a different antenna

Re: [Elecraft] KPA500-KAT500 tuning settings

"Kenwood rigs have master/slave menu options designed to enable one Kenwood rig to follow the frequency of another.  The KAT500 manual recommends enabling these options, but I cannot confirm if they affect the frequency reported by the FA; command.  If you have a null modem cable, can you please co

Re: [Elecraft] KPA500-KAT500 tuning settings

Andy, Kenwood rigs have master/slave menu options designed to enable one Kenwood rig to follow the frequency of another. The KAT500 manual recommends enabling these options, but I cannot confirm if they affect the frequency reported by the FA; command. If you have a null modem cable, can you ple

Re: [Elecraft] KPA500-KAT500 tuning settings

"You can only connect a maximum of three antennas to a KAT500." Any time you use a KAT500 with multiple antennas connected, and you also use a KPA500, you run the risk that the band change RF blip will fault the tuner, or the amplifier, or both. This happens because the RF pulse gets to the

Re: [Elecraft] KPA500-KAT500 tuning settings

So you obviously have a different antenna on 10m than you do on 20m. Do you have different antennas on every band? You can only connect a maximum of three antennas to a KAT500. I use a Top Ten band decoder to automatically switch an external coax relay box, no TX is necessary. John KK9A

Re: [Elecraft] KPA500-KAT500 tuning settings

On 5/9/2021 9:09 PM, Wes wrote: But back to the issue at hand.  If I'm tuned up and working on 20-meters but want to quickly listen to 10-meters for instance, why should I have to transmit on 10 just to switch antennas? It's an auto antenna tuner, with memories that, hopefully, have been trai

Re: [Elecraft] KPA500-KAT500 tuning settings

Until I got a TS-890 where I use virtual COM port keying on RTTY, or back when I was on EME, I also have never used anything but VOX, or the CW equivalent. But back to the issue at hand.  If I'm tuned up and working on 20-meters but want to quickly listen to 10-meters for instance, why should I

Re: [Elecraft] KPA500-KAT500 tuning settings

On 5/9/2021 1:06 PM, Wes wrote: What part of: "If you just want to listen, you are out of luck.", did you miss? I didn't miss a thing -- all the listening I do is through a transceiver, so I can do any of those things for a fraction of a second and then do all the listening I want. I'm very

Re: [Elecraft] KPA500-KAT500 tuning settings

What part of: "If you just want to listen, you are out of luck.", did you miss? Wes  N7WS On 5/9/2021 12:03 PM, Jim Brown wrote: On 5/9/2021 11:53 AM, Wes wrote: Some will argue that r-f sensing works, which is true if you want to transmit.  If you just want to listen, you are out of luck.

Re: [Elecraft] KPA500-KAT500 tuning settings

Though it works, best practice when using a K3 is to use AUX cables. The AUXBUS line (pin 2) in the AUX cable provides notification to the K3 as the amp switches from standby to operate, so drive power can be adjusted automatically AUXBUS also lets you use the band buttons on the KPA500 to change

Re: [Elecraft] KPA500-KAT500 tuning settings

nsceiver and the Elecraft KPA500 amplifier although it may be easily used with other transceivers and amplifiers." The last part is simply not true, IMHO, of course. I guess that depends on how you define "easily". Plug and play cables and plus some menu configuration seems pretty ea

Re: [Elecraft] KPA500-KAT500 tuning settings

On 5/9/2021 11:53 AM, Wes wrote: Some will argue that r-f sensing works, which is true if you want to transmit.  If you just want to listen, you are out of luck. The KAT500, KPA500, and KPA1500 will sense on a dit, a tap on a mic, or a quick pulse of Tune from WSJT-X. I've never used an AUX ca

Re: [Elecraft] KPA500-KAT500 tuning settings

Automatic Antenna Tuner is designed to be closely integrated with the Elecraft K3 transceiver and the Elecraft KPA500 amplifier although it may be easily used with other transceivers and amplifiers." The last part is simply not true, IMHO, of course. I guess that depends o

Re: [Elecraft] KPA500-KAT500 tuning settings

On Sun, May 9, 2021 at 9:33 AM Wes wrote: > This despite the claim: "The KAT500 Automatic Antenna Tuner is designed to > be > closely integrated with the Elecraft K3 transceiver and the Elecraft > KPA500 > amplifier although it may be easily used with other transceiv

Re: [Elecraft] KPA500-KAT500 tuning settings

sely integrated with the Elecraft K3 transceiver and the Elecraft KPA500 amplifier although it may be easily used with other transceivers and amplifiers." The last part is simply not true, IMHO, of course. Wes  N7WS * * * * On 5/8/2021 5:33 PM, Lyn Norstad wrote: Wes, are you thinkin

Re: [Elecraft] KPA500-KAT500 tuning settings

On Sat, May 8, 2021 at 2:22 PM Andy Durbin wrote: > Having the KPA500 and KAT500 tune before transmit requires something to > send TX band data to KPA500 and TX frequency data to KAT500. Following > Kenwood FA is a weak (in my opinion hopelessly unsatisfactory) solution > since split operation

Re: [Elecraft] KPA500-KAT500 tuning settings

:42 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500-KAT500 tuning settings In answer to the last question I would expect, never. They've moved on to K4s. Wes N7WS K3, K3S, KPA500, KAT500 and TS890. On 5/8/2021 2:22 PM, Andy Durbin wrote: > "if I switch the KPA500

Re: [Elecraft] KPA500-KAT500 tuning settings

In answer to the last question I would expect, never.  They've moved on to K4s. Wes  N7WS K3, K3S, KPA500, KAT500 and TS890. On 5/8/2021 2:22 PM, Andy Durbin wrote: "if I switch the KPA500 with the band buttons to another band I would expect the KAT500 to follow the last tune settings on the

[Elecraft] KPA500-KAT500 tuning settings

"if I switch the KPA500 with the band buttons to another band I would expect the KAT500 to follow the last tune settings on the new band. However this is not the case, the tuner switches to the new band settings only when HF goes through. The 15-p cable is connected and there is no K3 connected.

Re: [Elecraft] KPA500-KAT500 tuning settings

Steef, See this recent post for explanation: http://mailman.qth.net/pipermail/elecraft/2021-April/284736.html. The KAT500 can auto-track any Kenwood or Kenwood-compatible rig that outputs frequency data in the format: "FA00014025000;". Connect the RS232 RXD line (Pin 2) of the Kenwood rig to th

Re: [Elecraft] KPA500-KAT500 tuning settings

craft@mailman.qth.net" Sent: 08/05/2021 12:59:03 Subject: [Elecraft] KPA500-KAT500 tuning settings Hi, if I switch the KPA500 with the band buttons to another band I would expect the KAT500 to follow the last tune settings on the new band. However this is not the case, the tuner switches to th

[Elecraft] KPA500-KAT500 tuning settings

Hi, if I switch the KPA500 with the band buttons to another band I would expect the KAT500 to follow the last tune settings on the new band. However this is not the case, the tuner switches to the new band settings only when HF goes through. The 15-p cable is connected and there is no K3 connec

Re: [Elecraft] KPA500 Relay Failure

Good work. On 5/1/2021 9:45 AM, wa9fvp wrote: I'm repairing a KPA500 for a friend that has the RX loss in standby mode. After a time, he also lost receive in operate mode. After doing a teardown, I found the problem. With the PA board removed, I checked K23A relay. The normally closed contact

[Elecraft] KPA500 Relay Failure

I'm repairing a KPA500 for a friend that has the RX loss in standby mode. After a time, he also lost receive in operate mode. After doing a teardown, I found the problem. With the PA board removed, I checked K23A relay. The normally closed contact on the antenna side of the relay was open. K

[Elecraft] KPA500 Question

splay preceded with a * indicates the amp is in transmit mode.   If so, something is pulling the KEY line to ground. 73 Bob, K4TAX Message: 1 Date: Sun, 18 Apr 2021 17:36:48 -0400 From: To: Subject: [Elecraft] KPA500 Question Message-ID:<001001d7349a$f0a01570$d1e04050$@gmail.com> Content

Re: [Elecraft] KPA500 Question

uit over the years. I don't know about dates. You might find this interesting (although I think your failure is different - I've been "lucky" enough to experience both, and more): http://ok1rp.blogspot.com/2017/02/elecraft-kpa500-lpf-tr-switch-rework.html Mine when back in lat

Re: [Elecraft] KPA500 Question

Point taken. FWIW: This "known failure" tech comment was in 2018. Jim - WS6X On Sun, Apr 18, 2021, 8:33 PM KENT TRIMBLE wrote: > Just because a tech says it's a known failure today doesn't mean it's > been a known failure throughout its production run. ___

Re: [Elecraft] KPA500 Question

Just because a tech says it's a known failure today doesn't mean it's been a known failure throughout its production run.  Component availability and sourcing necessarily change over the years.  A robust component from a former supplier ten years ago may not be as robust from a different suppli

Re: [Elecraft] KPA500 Question

"When I engage OPER the input signal is attenuated by ~20 dB." Thanks to all for the prompt and informative replies. Apparently the culprit has been found. Several reported the exact same issue, one as recently as one week ago. According to one reply, an Elecraft Tech told him, "This is a known fa

Re: [Elecraft] KPA500 Question

Subject: Re: [Elecraft] KPA500 Question Is the key line indication on all the time? This may be indicative of a stuck key line. There was an unsoldered resistor on mine causing the issue. 73, Mark W7MLG On Sun, Apr 18, 2021, 2:38 PM wrote: > I just purchased a used KPA500 (SN 0456) fro

Re: [Elecraft] KPA500 Question

Hi Jim, Sounds like an issue with the T/R circuit, you'll find some reports in the history of this list. I had a very similar case just one week ago - in my case it was R7 which was blown. The original type seems to be a 51 Ohm (type 1206 SMD) resistor - I've used now two 100 Ohm 1/4 watt resistor

Re: [Elecraft] KPA500 Question

Is the key line indication on all the time? This may be indicative of a stuck key line. There was an unsoldered resistor on mine causing the issue. 73, Mark W7MLG On Sun, Apr 18, 2021, 2:38 PM wrote: > I just purchased a used KPA500 (SN 0456) from a close friend. The amp was > just back to the

[Elecraft] KPA500 Question

" When I engage OPER the input signal is attenuated by ~20 dB." I can detect no difference in received signal between OPER and STBY. This was for an "on air" test. I did not test with a signal generator. Andy, k3wyc __ Elecraft mailin

[Elecraft] KPA500 Question

I just purchased a used KPA500 (SN 0456) from a close friend. The amp was just back to the factory for several repairs and was thoroughly tested. The report reads, "KPA500 #0456 meets or exceeds all factory specifications." My friend unboxed the amp and made several QSOs to be sure all issues were

Re: [Elecraft] WTB: Elecraft KPA500 and KAT500

Forgot to add, please contact me only by email, laderman AT earthlink DOT net 73, Lou W0FK -- Sent from: http://elecraft.365791.n2.nabble.com/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http:

[Elecraft] WTB: Elecraft KPA500 and KAT500

Looking for an Elecraft KPA500 and a KAT500 to pair with my K3S/P3. I’ve built and owned several of these in the past and am familiar with both units and current market pricing. Please provide particulars (serial numbers, age, kit or factory built, asking price shipped to 63141, etc). Payment

Re: [Elecraft] Kpa500 not playing with my IC-7600

Tom, While I do not have an IC-7600 I do use an IC-7610 with a KPA500; the cable should be the same. I use a DIY band data cable to connect the IC-7610 to the KPA500 and it has worked for almost three years. I'm curious as to the exact part numbers of the cables you purchased from the two differe

[Elecraft] Kpa500 not playing with my IC-7600

Good day, and thanks for reading. My newly acquired KPA500 doesn’t want to play with my IC-7600. In operate mode when I key the radio, the LEDs on the KPA500 display solid into the yellow, and there is no output. The amp is not faulting. I’m using an Icom 7 pin DIN cable (two actually from

[Elecraft] KPA500 Bias-set Procedure

I am looking for the procedure to set the bias after replacing the finals in the KPA500. Any advice would be most appreciated. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mm

[Elecraft] KPA500 OPER/STBY switching?

Recently I am seeing an intermittent problem with my KPA500. Occasionally it will not switch from STBY to Operate, however if I switch it OFF via the front panel and back on again the problem clears and it will switch to Operate. Anyone else see this problem and know the fix, thanks? 73 F5VJC ___

[Elecraft] KPA500 protection

: Thu, 18 Mar 2021 22:35:47 + From: Andy Durbin To:"elecraft@mailman.qth.net" Subject: Re: [Elecraft] KPA500 protection Message-ID: Content-Type: text/plain; charset="iso-8859-1" "How does a LP100 protect against stupid errors?" LP-100A is desi

Re: [Elecraft] KPA500 protection

"How does a LP100 protect against stupid errors?" LP-100A is designed to open the key line when SWR exceeds a user defined threshold. When I make a mistake it is often the first to trip. 73, Andy, k3wyc __ Elecraft mailing list Home:

Re: [Elecraft] KPA500 protection

I am also curious how the KPA500's are failing even with the fault protection. I consider the KPA500 to be one of the best solid state amps available. How does a LP100 protect against stupid errors? John KK9A Andy Durbin K3WYC wrote: Two post today about KPA500 that seem to have been dama

Re: [Elecraft] KPA500 protection

Hi Andy I blew my 6M Caps one day, but it was 100% my stupidity when I kept bombarding it with a full 100w carrier when I had the amp to go 'online' when it was turned on. This is a firmware setting. It tripped off the first time. I reset it and hit it again (not thinking) and the CAPs blew. I

[Elecraft] KPA500 protection

Two post today about KPA500 that seem to have been damaged because the built in protection was inadequate. What's going on? In my station the KPA500 is protected against stupid errors that cause high SWR by the KPA500 itself, by my KAT500, by my LP100A, and by my Arduino controller. I hope on

[Elecraft] KPA500 LPF BOARD BURNED UP

I know this is long shot, but, Does anyone have a spare; good; KPA500 LPF BOARD? If so, are you willing to part with it? Thanks 73's Ron Durie WB4OOA 704-843-3681 wb4...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.

[Elecraft] KPA500 Remote Power on Question

I am controlling my KPA500 using the Remote software running through my computer using the Local Host Option. I am doing the same with my KAT500 with that remote software too. The objective was to move both off my main station table. I can turn the KAT500 on/off using the software. Is there a way t

Re: [Elecraft] KPA500 Port problem

When does it disconnect? Does it disconnect if you don't transmit? Does it disconnect if you transmit with the KPA500 in standby? Does it disconnect if you transmit with the KPA500 operating? Does it matter which band you are on? If the answers to the above are different, you may have an RF on

Re: [Elecraft] KPA500 Port problem

Tim, Why don’t you try using the KPA500 remote software instead? Here is the link: https://elecraft.com/pages/kpa1500-kpa500-kat500-remote-software Raj, N2RD > On Mar 3, 2021, at 11:45 AM, Tim C wrote: > > I live in a nurs

[Elecraft] KPA500 Port problem

I live in a nursing home and am mobility impaired and must control my KPA500 with my computer. I saved for over a year for the amp. My KPA500 will stay connect to my computer for <2 min and the Utility locks up and the only way to get it to load again is to re-boot the computer. The error mes

[Elecraft] KPA500 Port problem

I live in a nursing home and am mobility impaired and must control my KPA500 with my computer. I saved for over a year for the amp. My KPA500 will stay connect to my computer for <2 min and the Utility locks up and the only way to get it to load again is to re-boot the computer. The error messag

[Elecraft] KPA500 TX with second radio SOLVED

"Chuck keeps providing riddles for behavior that is a bit different than what I expected. The original K3 with the KIO3 board exhibits exactly the behavior I outlined previously. A K3S or K3 with the KIO3B interface behaves the way Chuck describes. A look at the KIO3B schematic reveals why - it

Re: [Elecraft] KPA500 TX with second radio SOLVED

Chuck keeps providing riddles for behavior that is a bit different than what I expected. The original K3 with the KIO3 board exhibits exactly the behavior I outlined previously. A K3S or K3 with the KIO3B interface behaves the way Chuck describes. A look at the KIO3B schematic reveals why - it h

Re: [Elecraft] KPA500 TX with second radio SOLVED

I can confirm this approach works in practice, however one point is important - If you turn off the K3S, but leave the KPA on, the discharge time will be at least ten minutes. I didn't bother testing after that. If you turn off the K3S, then turn off the KPA, then turn the KPA back on, it has fu

Re: [Elecraft] KPA500 TX with second radio SOLVED

This bothered me a bit, so I took a good look at the source code and did some testing. my results may be interesting. Chuck’s description with the K3S Not connected to the KPA are correct. When nothing is connected to the band lines, they are pulled high inside the KPA500. In the two radio mode

Re: [Elecraft] KPA500 TX with second radio SOLVED

OK, I've figured out the problem. I took a step back and realized I am spoiled by the close integration of the K-Line. The reason the FT101 can't key the amp is because, unless the K3S is turned on, the amp won't leave STANDBY mode. Even with the AUX cable disconnected, the amp sits in STANDBY a

[Elecraft] KPA500 TX

Just a follow-up to my question about using the KPA500/KAT500 with a second, older radio. I just finished some more testing and found that when I remove the AUX cable from the back of the KPA and try to put the KPA into TX with the keyline, it stays in RX. A continuity tester confirms the rig key

[Elecraft] KPA500 AND LP-BRIDGE

Hi there Has anyone tried and /or had any success with controlling band changes etc on a KPA500 from N8LP's LP Bridge 2 utility please? I'll appreciate some help in setting it up if possible. 73 and TIA -- Phil Whitchurch G3SWH and AD5YS www.g3swh.org.uk Work is the curse of the drinking c

Re: [Elecraft] KPA500 Bypass Power Limit?

...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown Sent: Saturday, December 26, 2020 1:55 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 Bypass Power Limit? On 12/25/2020 7:12 PM, Andy Durbin wrote: > KPA500 has no "BYPASS" mode. It is eith

Re: [Elecraft] KPA500 Bypass Power Limit?

On 12/25/2020 7:12 PM, Andy Durbin wrote: KPA500 has no "BYPASS" mode.  It is either Off, On in STBY, or On in OPER. Picky, picky, picky. :) When all of the power amps I'm aware of are in a mode usually called "Standby," meaning that they are powered up and ready to transmit, but are Bypassed

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