Re: [Elecraft] KPA500 Clicks & Pops

Come to think about it, I haven't heard mine click and pop in quite some time.  I doubt that it's seasonal, but that is an interesting twist.  I doubt that my room or the dormant equipment varies over +/- 2°F over any given 24 hr period. 73 Bob, K4TAX On 4/7/2019 1:11 PM, Andy Durbin wrote:

[Elecraft] KPA500 Clicks & Pops

This will only be of interest to a few KPA500 owners - those who don't think loud clicks/ticks/pops are acceptable. In the message below I reported that I had lost interest in my investigation because the click/ticks had stopped. That message is dated October 2018. Late March the ticks

Re: [Elecraft] KPA500 Clicks & Pops

terrestrial HF users. >> >> Not picking on you personally, but you made the statement so figure maybe >> would reply. Just curious. >> >> 73, Ed - KL7UW >> * that I/F later was used for JT-65 on eme 15 years ago. Now use my K3 >> directly connected. >>

Re: [Elecraft] KPA500 Clicks & Pops

Guess I got a few replies to my comments. I will try to respond to all in this one: James-w6jhb: Bob did reply back and was referring to using digital on 160m, which is harder to work than upper bands like 20m. More power helps. I have done some operating on 600m (before it became a ham

Re: [Elecraft] KPA500 Clicks & Pops

That digital modes are all "low power modes" is an unfortunate urban legend, Ed.  PSK31 is very narrow and will work well in very narrow RX bandwidths.  Noise power, being proportional to bandwidth, will thus be less on each end, and lower powers work well.  It's also angle modulation and

Re: [Elecraft] KPA500 Clicks & Pops

Cc: "elecraft@mailman.qth.net" Subject: Re: [Elecraft] KPA500 Clicks & Pops Message-ID: Content-Type: text/plain;   charset=us-ascii I do run 400 watts or so on digital modes.  Issues are not really noted on SSB or CW modes. I've set the Fan Ctr to 2 and 3 and still noted the issue Was

Re: [Elecraft] KPA500 Clicks & Pops

X > To: "Dauer, Edward" > Cc: "elecraft@mailman.qth.net" > Subject: Re: [Elecraft] KPA500 Clicks & Pops > Message-ID: > Content-Type: text/plain; charset=us-ascii > > I do run 400 watts or so on digital modes. Issues are not really noted on &

Re: [Elecraft] KPA500 Clicks & Pops

uld reply. Just curious. 73, Ed - KL7UW * that I/F later was used for JT-65 on eme 15 years ago. Now use my K3 directly connected. Date: Tue, 16 Oct 2018 16:59:15 -0500 From: Bob McGraw K4TAX To: "Dauer, Edward" Cc: "elecraft@mailman.qth.net" Subject: Re: [Elecraf

[Elecraft] KPA500 Clicks & Pops

"If you can figure out how to keep the relatively thin "Z" panel from expanding and contracting as it is heated and cooled, you will have a solution to the problem." If the Z bracket really is the source of the noise, and I'm not yet convinced it is, then there is no need to stop it expanding

Re: [Elecraft] KPA500 Clicks & Pops

6 Oct 2018 14:13:55 -0700 From: Dennis Moore To: Elecraft Reflector Subject: Re: [Elecraft] KPA500 Clicks & Pops Message-ID: <0497f5c1-6e76-75be-53c4-4acf668d9...@mail4life.net> Content-Type: text/plain; charset=utf-8; format=flowed I rarely hear anything from

Re: [Elecraft] KPA500 Clicks & Pops

25 >Date: Tue, 16 Oct 2018 14:13:55 -0700 >From: Dennis Moore >To: Elecraft Reflector >Subject: Re: [Elecraft] KPA500 Clicks & Pops >Message-ID: <0497f5c1-6e76-75be-53c4-4acf668d9...@mail4life.net> >Content-Type: text/plain; charset=utf-8; for

Re: [Elecraft] KPA500 Clicks & Pops

On 10/16/2018 1:56 PM, Bob McGraw K4TAX wrote: I've tried to determine where the clicks originate without success. This is a much discussed issue. Check the archive. Call or email Elecraft if you want to know more. 73, Jim K9YC __

[Elecraft] KPA500 Clicks & Pops

Reflector Subject: Re: [Elecraft] KPA500 Clicks & Pops Message-ID: <0497f5c1-6e76-75be-53c4-4acf668d9...@mail4life.net> Content-Type: text/plain; charset=utf-8; format=flowed I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit exper

Re: [Elecraft] KPA500 Clicks & Pops

..AB4IQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dennis Moore Sent: Tuesday, October 16, 2018 4:14 PM To: Elecraft Reflector Subject: Re: [Elecraft] KPA500 Clicks & Pops I rarely hear anything from my KPA5

Re: [Elecraft] KPA500 Clicks & Pops

Mine was a kit (sn 267) and I've never heard any noises from it whatever. Kent  K9ZTV On 10/16/2018 4:13 PM, Dennis Moore wrote: I wonder if those with the kit experience more noise than those with factory assembled units? --- This email has been checked for viruses by AVG.

Re: [Elecraft] KPA500 Clicks & Pops

...@mailman.qth.net On Behalf Of Dennis Moore Sent: Tuesday, October 16, 2018 4:14 PM To: Elecraft Reflector Subject: Re: [Elecraft] KPA500 Clicks & Pops I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled u

Re: [Elecraft] KPA500 Clicks & Pops

Mine is a KPA500-F s/n 3519 thus it is factory assembled. 73 Bob, K4TAX On 10/16/2018 4:13 PM, Dennis Moore wrote: I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units? Dennis NJ6G On

Re: [Elecraft] KPA500 Clicks & Pops

I rarely hear anything from my KPA500-F. Serious question, I wonder if those with the kit experience more noise than those with factory assembled units? Dennis NJ6G On 10/14/2018 19:52, Bob McGraw K4TAX wrote: What is the recommended solution to stopping the clicks and pops from the KPA500

Re: [Elecraft] KPA500 Clicks & Pops

I've tried to determine where the clicks originate without success.  I've loosened screws on the top and right side and tightened screws on the top and right side.  No difference. Perhaps someone at Elecraft will add a comment in this regard. I did observe that the 5 screws at the center of

[Elecraft] KPA500 Clicks & Pops

I found this quite annoying too. My approach was to try to understand how the Z bracket temperature varied relative to the heat sink temperature. I placed a thermistor on the front end of the Z bracket and another on the heat sink fin closest to the Z bracket. I logged the standard PA

Re: [Elecraft] KPA500 Clicks & Pops

Ear plugs. Sent from my iPhone ...nr4c. bill > On Oct 14, 2018, at 10:52 PM, Bob McGraw K4TAX wrote: > > What is the recommended solution to stopping the clicks and pops from the > KPA500 as the amp heats during transmission and cools during receive? I've > seen one that suggested

[Elecraft] KPA500 Clicks & Pops

What is the recommended solution to stopping the clicks and pops from the KPA500 as the amp heats during transmission and cools during receive?  I've seen one that suggested replacing the screws in the Z bracket with 4-40 x 1/4".    Any traction to this? The amp performs absolutely fantastic. 

Re: [Elecraft] KPA500 clicks

This is normal on the KA500 (and also on the KPA1500) and is due to slightly different rates of thermal expansion and contraction of the heatrsink and sheet metal connected to it. In general it occurs mostly when the amp is used in higher duty cycle operation and will vary slightly from unit to

Re: [Elecraft] KPA500 clicks

I doubt that a phone recording has the proper range to qualify as a test device. I'll wait for the resident audio guru K9YC to set things a-right on a scientific test. The only time I get clicks on my very early kit built is in a RTTY contest, where I already have the fan at level two ... they

[Elecraft] KPA500 clicks and thermal design

I don't think the clicks have anything to do with the transformer mounting. On my amp it occurs when the transistors heat up. Keeping the fan on a higher speed will eliminate this clicking however then you have to listen to fan noise. Perhaps Elecraft has a fix for this but I have not used the amp

Re: [Elecraft] KPA500 clicks and thermal design

My KPA500 clicking has pretty much stopped as well.  The transformer noise has also reduced in amplitude over time (about 3 months). Michael Blake k9...@mac.com On Apr 21, 2018, at 03:26 PM, Craig Buck wrote: Make sure the transformer is on straight and secured. Mine

Re: [Elecraft] KPA500 clicks and thermal design

Make sure the transformer is on straight and secured. Mine clicked for a while but has since stopped. On Sat, Apr 21, 2018, 1:35 PM ANDY DURBIN wrote: > I find the "clicks" my KPA500 makes as its temperature changes to be quite > distracting. Part of the problem is that I'm

[Elecraft] KPA500 clicks and thermal design

I find the "clicks" my KPA500 makes as its temperature changes to be quite distracting. Part of the problem is that I'm chasing a problem where the KPA500 changes band spuriously and the thermal clicks sound too much like the relays re-configuring the LPF. To what extend does the thermal

Re: [Elecraft] KPA500 Clicks

This came up recently w/ the K3 as well, and perhaps a year or two back. It /sounds/ like a tiny relay is clicking in the K3 on t/r switching even though it's all solid-state. Wayne speculated that the sound might be coming from relay springs re-balancing slightly in response to

Re: [Elecraft] KPA500 Clicks

As noted in the current KPA500 manual, this is normal and can happen after the heatsink has been heated up. As it cools the different metals in KPA500 case and heatsink contract at a different rate, causing the slight ticking that is occasionally heard. 73, Eric elecraft.com On 4/2/2014

Re: [Elecraft] KPA500 Clicks

My KPA500 s/n 107 produces clicks from time to time, even in STBY or on RX. Glad I now know why - the Z bracket! Nothing to worry about! 73 Richard - HB9ANM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft

Re: [Elecraft] KPA500 Clicks

Thanks for all the comments on the KPA500 Clicks. Looks like I'm not the only one that has noticed it. I guess I won't worry about it. I have had the AMP for a few months now and have been very satisfied with it so far. Thanks again! -- 73 Steve AI9T http://www.ai9t.com AI9T DX Cluster

Re: [Elecraft] KPA500 Clicks

the amp came out. 73, Dave, N4QS -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Steve AI9T Sent: Monday, January 27, 2014 1:05 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 Clicks Thanks for all the comments

Re: [Elecraft] KPA500 Clicks

1:05 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 Clicks Thanks for all the comments on the KPA500 Clicks. Looks like I'm not the only one that has noticed it. I guess I won't worry about it. I have had the AMP for a few months now and have been very satisfied with it so far

Re: [Elecraft] KPA500 Clicks

On Mon, 27 Jan 2014 14:27:59 -0600, Dave Perry wrote: Steve, My KPA500 also has the clicks and pops as it heats up and expands. I'm rather curious about this clicking people are talking about. I have SN 1255 and have heard none of what is being described. I've purposely heated it from cool

Re: [Elecraft] KPA500 Clicks

. 73, Dave, N4QS -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Steve AI9T Sent: Monday, January 27, 2014 1:05 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 Clicks Thanks for all the comments

Re: [Elecraft] KPA500 Clicks

] KPA500 Clicks Thanks for all the comments on the KPA500 Clicks. Looks like I'm not the only one that has noticed it. I guess I won't worry about it. I have had the AMP for a few months now and have been very satisfied with it so far. Thanks again! -- 73 Steve AI9T http

[Elecraft] KPA500 Clicks

During a couple recent RTTY contest I have noticed that my KPA500 is making a noise. It kind of sounds like a relay clicking in and out. When I first noticed it I thought it was a fan relay or something to do with the fan. But after hearing this longer it seems to be related to the temp. It

Re: [Elecraft] KPA500 Clicks

I have noticed the same clicks with mine. I run mostly meteor scatter on 6 meters, which is somewhat similar to RTTY - long transmit times with a high average output power. After emailing Elecraft support on May 6th of last year concerning a failure of my KAT500 tuner (which apparently had

Re: [Elecraft] KPA500 Clicks

Heard it today for the first time. I find it quite soothing, but would like to know more about it... :-) 73 Stewart G3RXQ On Sun, 26 Jan 2014 18:16:52 -0500, Sebastian, W4AS wrote: I have noticed the same clicks with mine. I run mostly meteor scatter on 6 meters, which is somewhat similar to

Re: [Elecraft] KPA500 Clicks

Mine does it too. Fred KE7X -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Stewart Sent: Sunday, January 26, 2014 4:25 PM To: Sebastian, W4AS; Elecraft Subject: Re: [Elecraft] KPA500 Clicks Heard it today for the first

Re: [Elecraft] KPA500 Clicks

Finally! An advantage to being nearly deaf ... mine doesn't. At least, if I can't hear it, it isn't there, that's my story and I'm sticking to it. :-) Since I use headphones 100% of the time, I doubt I'd hear it even if I could hear. FT5ZM is S9 [i.e. -73dBm, I calibrated my K3 with my

Re: [Elecraft] KPA500 Clicks

I seem to recall this was reported some time ago. IIRC, for that particular op, it ended up being slightly loosened hardware on the main heat sink assy. I would check all hardware (internally and externally) and see if anything has loosened up, through thermal cycling. Bruce, N1RX

Re: [Elecraft] KPA500 Clicks

I have clicks in my house from similar thermal expansion and contraction. It is most noticeable during the Winter season. The KPA500 is similar, and it is not really a problem, just the consequence of things heating and then cooling. I would guess that the clicks could be eliminated by

[Elecraft] KPA500 Clicks

FWIW, I've noticed these clicks from within my KPA500 too.  I always assumed they were thermal expansion and contraction of hardware within the amp.  I ignore them because they have never been associated with any problem with the function of the amp.  Besides,  I don't know how you'd begin to try

Re: [Elecraft] KPA500 Clicks

I have a very early KPA500, serial in low 200's. I have a quiet outside shack and I've heard the Clicks since day 1. I've always thought these were part of the amps normal operating noise environment. If fact, I tend to notice more if I don't hear the clicks. The description given - The passage