Re: [Elecraft] KPA 500 vs New 1500 watt amp

Terry and All, Your view is shared by a lot of us, but not everyone. The hard core QRO folks are having a euphoric experience right now. Christmas in April ! Well, I think it is great that their wishes seem to have been granted. I suppose if all the stars lined up just right I could be one

Re: [Elecraft] KPA 500 vs New 1500 watt amp

One S-unit in a pile-up or on a noisy band can be a big deal. If all you do is rag chew in low noise environments then maybe you wouldn't notice. In the noise on the low bands or if you're trying to break a pile up, that 4.5 dB means you're a lot louder than someone else. Whether that is worth

Re: [Elecraft] KPA 500 vs New 1500 watt amp

2017 8:12 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA 500 vs New 1500 watt amp If the new Elecraft amp is indeed 1500 watts it might be worth considering that going from 500 to 1500 watts is only about 4.5 Db or less than 1 S-unit in signal strength. If I owned the KPA 500 it would

[Elecraft] KPA 500 vs New 1500 watt amp

If the new Elecraft amp is indeed 1500 watts it might be worth considering that going from 500 to 1500 watts is only about 4.5 Db or less than 1 S-unit in signal strength. If I owned the KPA 500 it would be a hard sell to get me to move to ANY 1500 watt amp. Respectfully, Terry, N7TB

Re: [Elecraft] KPA-500 Running hot on 20m

OT: but I am going to add a couple cpu fans to the heat sink of my KXPA100 which will be installed under the backseat of my truck. That will ensure a little more cooling. The seat sets down on top of the fins so the fans will be positioned to feed from one end. The enclosure will be drilled

Re: [Elecraft] KPA-500 Running hot on 20m

Optionally, one can replace the internal fans altogether (the heat sink is not sufficient for passive cooling under all conditions obviously). If your installation is static, or relatively static, you can duct cooling air from some place where the noise is "OK" to a properly located input. OR,

Re: [Elecraft] KPA-500 Running hot on 20m

, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ignacy Sent: Tuesday, January 10, 2017 8:19 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 Running hot on 20m I wrote an article on fan noise including in amplifiers. See

Re: [Elecraft] KPA-500 Running hot on 20m

I wrote an article on fan noise including in amplifiers. See http://www.eham.net/articles/38328. Ignacy, NO9E -- View this message in context: http://elecraft.365791.n2.nabble.com/KPA-500-Running-hot-on-20m-tp7625577p7625633.html Sent from the Elecraft mailing list archive at Nabble.com.

Re: [Elecraft] KPA-500 Running hot on 20m

Mike, I do a lot of RTTY and other sound card modes with my K3-KPA500 pair. I have the amp go to 70c sometimes, that is when the HIGHEST speed fan kicks in, NOT 65c. Not a problem, many RTTY contests and still works fine! The room ambient temp has a lot to do with the temp of the

Re: [Elecraft] KPA-500 Running hot on 20m

If it wasent for the noise I'd put mine in my wife's craft room. She loves the heat. Original message From: Ken K6MR <k...@outlook.com> Date: 2017-01-08 9:42 PM (GMT-05:00) To: Elecraft Reflector <elecraft@mailman.qth.net> Subject: Re: [Elecraft] KPA-500

Re: [Elecraft] KPA-500 Running hot on 20m

ilto:donw...@embarqmail.com>; Elecraft Reflector<mailto:elecraft@mailman.qth.net> Subject: Re: [Elecraft] KPA-500 Running hot on 20m SWR is fine. I have the KAT500 and a SteppIR antenna so that was never an issue. The amp has plenty of clearance around it. It was rather warm in the shack. Too

Re: [Elecraft] KPA-500 Running hot on 20m

SWR is fine. I have the KAT500 and a SteppIR antenna so that was never an issue. The amp has plenty of clearance around it. It was rather warm in the shack. Too many computers LOL. The high speed fan is crazy loud even for me that has hearing issues. Maybe will will encase it in ice next

Re: [Elecraft] KPA-500 Running hot on 20m

It also is fairly sensitive to how tightly enclosed your KPA500 is in your station equipment configuration. Mine came on high-fan often when on RTTY, or [fruitlessly] calling CQ in SS CW on Sun. I finally moved it out of it's "cubbyhole" under the shelf assembly, and it stayed on low fan all

Re: [Elecraft] KPA-500 Running hot on 20m

Mike, The efficiency will very from band to band, and is also somewhat dependent on the SWR it is working into. I would not think it is a problem - that is what the high speed fan is supposed to do, cool it with faster air, even if that is disconcerting. A lot depends on your transmit vs.

[Elecraft] KPA-500 Running hot on 20m

I was running the RTTY contest this weekend and expected to see higher than normal temps but on 20m and maybe 15 the amp was running 65c and up where the highest speed fan would come on. Generally in RTTY I would up the normal fan a couple of notches and it would be fine. I was not pushing

[Elecraft] KPA-500 fix

I thought I would share a fix to my KPA-500 with the group in case someone else might have the same problem. I have an old amp (two-digit serial number), and it has performed flawlessly until yesterday. Suddenly the Operate-Standby button stopped working, and then I noticed that other buttons

Re: [Elecraft] KPA 500 Hum

You may not have the transformer properly tightened down. Recheck it. Also, 58V is not that bad, but you might want to recheck that you are using the proper tap from the transformer. You just might want to go up a notch to get a higher voltage. Essentially you want the tap that provides the

[Elecraft] KPA 500 Hum

Just received a KPA 500 and KAT 500 yesterday. Using them with my Icom 7300. I know the manual says to expect some hum from the KPA 500 but I believe mine is more than a hum. When I send CW I don't need to monitor the radio side tone. I just have to listen to the amp. :-) Anyone else

Re: [Elecraft] Kpa 500 problem when auxiliary cable connected ...

The KPAK3AUX cable also switches the KPA500 band prior to transmit when you change bands on the K3/K3S. If the cable is not present, the amp will still change bands instantly upon transmission from any rig by measuring the frequency, including the K3/K3S. Either method works well. The

Re: [Elecraft] Kpa 500 problem when auxiliary cable connected ...

On Mon,8/15/2016 10:28 AM, Don Wilhelm wrote: Are you attempting to use the band decode lines on both the Icom and the K3 at the same time? That will cause problems unless there is some kind of isolation provided. And remember that the KPA500 does NOT need band information from the rig -- it

Re: [Elecraft] Kpa 500 problem when auxiliary cable connected ...

Jorge, Are you attempting to use the band decode lines on both the Icom and the K3 at the same time? That will cause problems unless there is some kind of isolation provided. The fact that the K3 and KPA500 work "alone" indicates that there may be some conflict on the band data lines. When

Re: [Elecraft] Kpa 500 problem when auxiliary cable connected ...

using the band change button on the K3 not RF sensing? Mark, WB9CIF -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jorge Mejia P Sent: Saturday, August 13, 2016 12:45 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] Kpa 500 problem when

[Elecraft] Kpa 500 problem when auxiliary cable connected ...

I had been successfully using my KPA500 with an Icom and a K3 , alternatively with the use of the Key Line interrupter and a separate key line. Suddenly I cannot change bands on theKPA500 or go on Tx, even though the auxiliary cable is well seated and the Key line interrupter is well

Re: [Elecraft] Kpa 500 problem when auxiliary cable connected ...

Oops. That should be the RADIO setting in the KPA500… - Jack, W6FB > On Aug 12, 2016, at 8:14 PM, Jack Brindle wrote: > > Make sure the RADIO setting in the K3 didn’t get changed away from K3. More > specifically, it sounds like it was changed to ANALOG without having the

Re: [Elecraft] Kpa 500 problem when auxiliary cable connected ...

Make sure the RADIO setting in the K3 didn’t get changed away from K3. More specifically, it sounds like it was changed to ANALOG without having the proper pin connected to the Icom’s analog band data signal. If that isn’t the problem, then I’ll have more questions to see how we might fix the

[Elecraft] Kpa 500 problem when auxiliary cable connected ...

Para: Elecraft@mailman.qth.net Asunto: Kpa 500 problem when auxiliary cable connected ... I had been successfully using my KPA500 with an Icom and a K3 , alternatively with the use of the Key Line interrupter and a separate key line. Suddenly I cannot change bands on theKPA500 or go on Tx,

[Elecraft] kpa 500 gain question

i see that Expert is proposing to the FCC to eliminate the 15db gain... SB QST ARL ARLB015 ARLB015 FCC Invites Comments on Petition to Eliminate 15 dB Gain Limit on Amateur Amplifiers Wondering how easy a mod ( and firmware) would enable our kx3s and Elad Duos to fully drive the KPA500

Re: [Elecraft] KPA-500 and a K2

The KPA500 is linear, with 13 db gain. That means the KPA should output about 20 x the input power. So, for 5 watts in, you should get about 100 out, for 10 in about 200 out. There are slight variances due to the KPA's input network. Also, be sure to check what the transceiver is putting out

Re: [Elecraft] KPA-500 and a K2

I drove a KPA500 with a KX3 with 10-watts drive. I think I got out about 175 watts or something like that. 73, phil, K7PEH > On Apr 7, 2016, at 2:00 PM, Ken Miller K6CTW wrote: > > All, > > Just wondering if anyone has tried driving a KPA-500 with a K2? If so what >

[Elecraft] KPA-500 and a K2

All, Just wondering if anyone has tried driving a KPA-500 with a K2? If so what output did you get at 5 watts in? 10 watts in? Thanks in advance for any ideas/data. 73 - Ken Miller, K6CTW K2 # 455 __ Elecraft mailing list Home:

[Elecraft] KPA 500 Standby to Operate fault

I'm new to this mailing list and not sure if my recent question has got through to members. I want to know why the signal passing through my KPA500  to my K3 on receive is attenuated by 3-5 'S' points on any band when I switch the amp manually from Standby to Operate. Is this a known issue and

[Elecraft] KPA 500

It is no longer available... Sold it! 73 Ozzie, w6icm __ 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:

Re: [Elecraft] KPA 500 voltage drop on key down

, November 20, 2015 7:46 AM To: Elecraft Reflector Subject: [Elecraft] KPA 500 voltage drop on key down I just set up my KPA 500 and the HV on standby is 72.5 volts. On key down, however, it drops to 48 volts and the lights in the shack noticeably flicker a bit. Would changing a the tap

[Elecraft] KPA 500 voltage drop on key down

I just set up my KPA 500 and the HV on standby is 72.5 volts. On key down, however, it drops to 48 volts and the lights in the shack noticeably flicker a bit. Would changing a the tap on the transformer potentially help things? Or is the real issue the voltage drop between the pole and the wall

Re: [Elecraft] KPA 500 voltage drop on key down

7:46 AM To: Elecraft Reflector Subject: [Elecraft] KPA 500 voltage drop on key down I just set up my KPA 500 and the HV on standby is 72.5 volts. On key down, however, it drops to 48 volts and the lights in the shack noticeably flicker a bit. Would changing a the tap on the transformer pot

Re: [Elecraft] KPA 500 voltage drop on key down

> or underrated. > > Changing the tap won't solve the problem and may damage the amp. > > 73, > > Cliff K3LL > > -Original Message- > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Matt > Murphy > Sent: Friday, November 20, 2015 7:46 AM >

Re: [Elecraft] KPA 500 voltage drop on key down

Hi, Matt, On Fri, Nov 20, 2015 at 11:13 AM, Cliff Frescura wrote: > Sounds like the amp is plugged into an outlet that is potentially > overloaded > or underrated. > > Changing the tap won't solve the problem and may damage the amp. > Precisely so! Put an AC voltmeter on the

Re: [Elecraft] KPA 500 voltage drop on key down

Is the amp running off of 240? The amp does draw quite a bit and really works best on 240 From: Matt Murphy <m...@nq6n.com> To: Elecraft Reflector <elecraft@mailman.qth.net> Sent: Friday, November 20, 2015 10:45 AM Subject: [Elecraft] KPA 500 voltage drop on key down I

Re: [Elecraft] KPA-500 Reliability

> My KPA-500 rests comfortably on top of my KAT-500 right beside my K3s > and P3( and K3 held in reserve). My modes of operation are principally > digital, either meteor scatter, PSK31, RTTY, and WSJTx and its many > variations. All of these are what I would term 100% duty cycle. Pretty much

[Elecraft] KPA-500 Reliability

My KPA-500 rests comfortably on top of my KAT-500 right beside my K3s and P3( and K3 held in reserve). My modes of operation are principally digital, either meteor scatter, PSK31, RTTY, and WSJTx and its many variations. All of these are what I would term 100% duty cycle. For meteor scatter

[Elecraft] KPA 500 with or without tuner

Hello Gentlerpersons. I am looking for a gently used KPA 500 with our without the matching tuner. It would be easier if it were already in Canada, but USA is great too. You may contact me via my website www.ve7fmn.ca or by email off of the reflector to conserve bandwidth. Cheers, Fred VE7FMN

[Elecraft] KPA-500 PA DISS Fault on 6 meters

Hi Everyone, In searching the reflector I see a few of you have the same problem that my KPS-500 has on 6 meter where it trips out with a PA DISS fault.  I too did what the others tried but I get the same results.  Of course it is 6 meter season and my KPA-500 is not helping me by tripping out.

[Elecraft] WTB: Elecraft KPA-500

Please let me know if you are selling your KPA-500. Thanks! -john NE4U Madison, WI __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] KPA 500 problem

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Re: [Elecraft] KPA-500 modifications

/ T/R circuit plus 12-meter low pass filter mod' mentioned in the advert. below? 73 Johnny VR2XMC 寄件人︰ H. Cary h3c...@gmail.com 收件人︰ elecraft@mailman.qth.net 傳送日期︰ 2015年06月10日 (週三) 4:15 AM 主題︰ [Elecraft] KPA-500 FOR SALE For Sale: Elecraft KPA-500, serial # 0698, solid state

[Elecraft] KPA-500 modifications

Thanks Arie. 寄件人︰ Arie Kleingeld PA3A p...@xs4all.nl 收件人︰ elecraft@mailman.qth.net; Johnny Siu vr2...@yahoo.com.hk 傳送日期︰ 2015年06月10日 (週三) 3:54 PM 主題︰ Re: [Elecraft] KPA-500 modifications Johnny, I have done that mod. Reason was that my KPA500 had high SWR at the input and barely

[Elecraft] KPA-500 FOR SALE

For Sale: Elecraft KPA-500, serial # 0698, solid state linear amplifier, covers 160-6 meters. Factory upgraded w/ T/R circuit plus 12-meter low pass filter mod on June 1, 2015. Amplifier meets or exceeds all factory specifications. $1750 shipped CONUS. Please contact direct: h3c...@gmail.com

[Elecraft] KPA-500 modifications

Does anyone have the any idea about the 'Factory upgraded w/ T/R circuit plus 12-meter low pass filter mod'  mentioned in the advert. below? 73 Johnny VR2XMC 寄件人︰ H. Cary h3c...@gmail.com 收件人︰ elecraft@mailman.qth.net 傳送日期︰ 2015年06月10日 (週三) 4:15 AM 主題︰ [Elecraft] KPA-500 FOR SALE

[Elecraft] KPA 500 and FTDX 3000

I hope to get my new KPA 500 on Monday. Anyone that is using this and the FTDX 3000 care to share their hook up experience etc? Brian W2BRM NY __ Elecraft mailing list Home:

[Elecraft] KPA 500 and FTDX 3000

Hello. I hope to get my new KPA 500 on Monday. Anyone that is using this and the FTDX 3000 care to share their hook up experience etc? Brian W2BRM NY __ Elecraft mailing list Home:

[Elecraft] KPA 500 and FTDX 3000

For the person who asked I used the 15 pin Linear jack on the back of the FTDX-3000 to accomplish a few things. First of all, I used Yaesu pin 2 (TX GND) as the key line for the KPA500, rather than the Elecraft's separate phono cable. Secondly, I used Yaesu pins 4, 5, 6 and 7 to supply

[Elecraft] KPA-500 problem

My KPA-500 seems to have developed a problem. It acts normally, except when the OPER/STBY switch is in OPER, it seems to attenuate received signals by 20dB or more. This is new behavior. Any ideas? If it's relevant, I have an early model, serial under 100, that has behaved flawlessly up

Re: [Elecraft] KPA-500 problem

Howard, Brilliant! That's it. Thanks. 73, andy ae6y From: Howard Stephenson Sent: Saturday, December 13, 2014 1:09 PM To: andrewfa...@ymail.com Subject: RE: [Elecraft] KPA-500 problem Hi Andy, If you see the * in the KPA display when you put the switch into OPER the KPA is going

[Elecraft] KPA-500 FW Update

Just thought I'd describe my recent KPA-500 firmware update experience for those Mac users who might be unsure about the process. I purchased my KPA-500 in Sept 2012 and have enjoyed using it ever since. I've also enjoyed lurking since then on this list - learning much in the process. During

Re: [Elecraft] KPA-500 FW Update

On Wed,9/3/2014 12:19 PM, J Robert Witmer wrote: I was skeptical but decided to proceed. After acquiring the interface cable I downloaded the Elecraft SW, followed the instructions for connecting my Mac to the KPA-500 and proceeded. To my amazement - It just worked” - the firmware updated

Re: [Elecraft] KPA-500: 270v error and R17 - fixed

Hi Keith, Thanks for your comments and also to several others who replied privately. I have now resolved the fault that was causing the +270v T/R bias line to be shorted and the 270v ERR hard fault to show. As several others have discovered with the same fault, the problem was C2, a faulty

[Elecraft] KPA-500: 270v error and R17

I wonder if anyone can offer some advice please? I've just put together a KPA-500 linear amplifier kit and everything seemed to work fine until I switched from standby to operate when I get a 270v ERR message, which needs a hard reset. The 60v line is present (68.5v) and the interlock works as

[Elecraft] KPA 500 failure

Hello list members I just finished putting together a KPA 500 which seems to be having problems. When I turn on and try to run the voltage test, the “HV” button does not respond …. the led’s bar graph indicate 100 W and I can’t turn it off from the front panel switch, I have to use the one

Re: [Elecraft] KPA 500 failure

I also just finished my new KPA500 build. Not 15 minutes ago. I didn't realize that the Fuse block is empty. Good thing i decided to actually double-check it before applying mains power. I figured they'd put the fuses in based on the power cable i ordered (US version, 115 V). Also, that whole

Re: [Elecraft] KPA 500 failure

I'd start by checking ALL wire connections. Be sure you have fuse block connected properly for your input voltage and proper fuses are installed. Call Elecraft first thing tomorrow for assistance. Good luck! Mine showed no high voltage at first. Found a shorted by-pass cap (tiny SMD type)

Re: [Elecraft] KPA 500 failure

Jorge; Check the ribbon cable connections going to the front panel. This sounds like one of those cables is not connected properly. The chief candidate is the 40-pin cable on the left side that goes from the Front panel board to the IO board. You should deb able to get the KPA going. If we

Re: [Elecraft] KPA-500 fan noise

;) From: Wes (N7WS) w...@triconet.org To: elecraft@mailman.qth.net Sent: Wednesday, June 4, 2014 2:04 PM Subject: Re: [Elecraft] KPA-500 fan noise You mean the responses from the intrepid ham experimenters who have historically torn into their gear to improve it or the hand wringers who worship

Re: [Elecraft] KPA-500 fan noise

And I just say what could possibly go wrong? Lol Sent from my Cricket smartphone Original message From: Jim Brown j...@audiosystemsgroup.com Date: 06/03/2014 21:43 (GMT-06:00) To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 fan noise On 6/3/2014 7:11 PM

Re: [Elecraft] KPA-500 fan noise

You mean the responses from the intrepid ham experimenters who have historically torn into their gear to improve it or the hand wringers who worship in the house of Elecraft? Those are rhetorical questions, we both know the answer:-) Wes N7WS Homebrewing since 1958 On 6/3/2014 7:11 PM,

Re: [Elecraft] KPA-500 fan noise

. From: Jim Brown j...@audiosystemsgroup.com To: elecraft@mailman.qth.net Sent: Monday, June 2, 2014 11:16 AM Subject: Re: [Elecraft] KPA-500 fan noise On 6/2/2014 7:56 AM, AG0N-3055 wrote: You could always try replacing the fan with a quieter fan. I would consider that myself

Re: [Elecraft] KPA-500 fan noise

of Elecraft products. 73, Dick - W7QHE/4 === Message: 9 Date: Mon, 02 Jun 2014 08:28:28 -0700 From: Fred Jensen k6...@foothill.net mailto:k6...@foothill.net To: elecraft@mailman.qth.net mailto:elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 fan noise

Re: [Elecraft] KPA-500 fan noise

Hooray! BTW, what is the replacement fan you used in your K3? Wes N7WS On 6/3/2014 7:19 AM, Harry Yingst via Elecraft wrote: I would tend to believe that replacing the cheap fans with higher quality fans would be a improvement in design. If the K3 cannot handle what little extra current

Re: [Elecraft] KPA-500 fan noise

I rag chew - long winded rag chew - and have never been insulted by the fan noises from the K3 or the KPA500. The noisiest they ever get is when I turn the KPA500 off - as it drains the power supply down. Certainly nothing like my previous tube type amp - providing over the air fan noise. The

Re: [Elecraft] KPA-500 fan noise

On 6/3/2014 7:19 AM, Harry Yingst via Elecraft wrote: Replacing the fans was a worthwhile improvement and made copy easier. Something does not compute. The fan in my KPA500 is pretty quiet on RX, and only gets loud during long transmissions, continuing for a short time (a few seconds) after

Re: [Elecraft] KPA-500 fan noise

but not the bearings From: Jim Brown j...@audiosystemsgroup.com To: elecraft@mailman.qth.net Sent: Tuesday, June 3, 2014 2:21 PM Subject: Re: [Elecraft] KPA-500 fan noise On 6/3/2014 7:19 AM, Harry Yingst via Elecraft wrote: Replacing the fans was a worthwhile

Re: [Elecraft] KPA-500 fan noise

...@audiosystemsgroup.com To: elecraft@mailman.qth.net Sent: Monday, June 2, 2014 11:16 AM Subject: Re: [Elecraft] KPA-500 fan noise On 6/2/2014 7:56 AM, AG0N-3055 wrote: You could always try replacing the fan with a quieter fan. I would consider that myself, but only with one recommended

Re: [Elecraft] KPA-500 fan noise

Some of the responses here really make me shake my head. Have fun. I learned long ago to not live in fear From: Don Wilhelm w3...@embarqmail.com To: elecraft@mailman.qth.net Sent: Tuesday, June 3, 2014 5:20 PM Subject: Re: [Elecraft] KPA-500 fan noise

Re: [Elecraft] KPA-500 fan noise

the air rushing but not the bearings *From:* Jim Brown j...@audiosystemsgroup.com *To:* elecraft@mailman.qth.net *Sent:* Tuesday, June 3, 2014 2:21 PM *Subject:* Re: [Elecraft] KPA-500 fan noise On 6/3/2014 7:19 AM, Harry

Re: [Elecraft] KPA-500 fan noise

Thanks to all who replied. If I did not have to cut a hole in the sheet rock, I would install a dryer vent!! I think I will try setting the fan to a minimum speed as suggested and see how that works out keeping the air moving all the time. 73s Jim, W4ATK

Re: [Elecraft] KPA-500 fan noise

From: Jim Rogers jim.w4...@gmail.com To: elecraft@mailman.qth.net Sent: Monday, June 2, 2014 7:26 AM Subject: Re: [Elecraft] KPA-500 fan noise Thanks to all who replied.  If I did not have to cut a hole in the sheet rock, I would install a dryer vent!! I think I will try setting

Re: [Elecraft] KPA-500 fan noise

On Mon, 2 Jun 2014 06:05:22 -0700 (PDT), Harry Yingst via Elecraft wrote: You could always try replacing the fan with a quieter fan. I would consider that myself, but only with one recommended by the good people at Elecraft. The fan in the KPA is VERY loud when it hits the last two speeds.

Re: [Elecraft] KPA-500 fan noise

On 6/2/2014 7:56 AM, AG0N-3055 wrote: You could always try replacing the fan with a quieter fan. I would consider that myself, but only with one recommended by the good people at Elecraft. It is generally a bad idea to try to re-engineer a product, especially one that is well designed. In

Re: [Elecraft] KPA-500 fan noise

Our Beverage Central is located in my shack. I was contemplating putting a heat exchanger on the KAP500 PA's and routing cold water from the drink fridge through it. I guess that would class as re-engineering? Haven't figured out how to get the plumbing out of the fridge, however. 73,

Re: [Elecraft] KPA-500 fan noise

will be still running but you won't notice. 73 Fred, AE6QL -Original Message- From: Fred Jensen k6...@foothill.net Sent: Jun 2, 2014 8:28 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 fan noise Our Beverage Central is located in my shack. I was contemplating putting a heat

Re: [Elecraft] KPA-500 fan noise

-Original Message- From: Fred Jensen k6...@foothill.net Sent: Jun 2, 2014 8:28 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 fan noise Our Beverage Central is located in my shack. I was contemplating putting a heat exchanger on the KAP500 PA's and routing cold water

Re: [Elecraft] KPA-500 fan noise

If you set fan speed to Level 1 in the first place, it will run continuously and avoid wide temperature variations. I can work pileups in RTTY at 500W and the fan goes into Level 2 on rare occasions and for a short time only. IMHO, the NORmal setting is not the best one. Level 1 (constant) is

Re: [Elecraft] KPA-500 fan noise

get more cooling from an ice cube. 73 Fred, AE6QL -Original Message- From: riese-k3...@juno.com Sent: Jun 2, 2014 9:29 AM To: fptowns...@earthlink.net Cc: k6...@foothill.net, elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 fan noise you guys add one of these less strain

Re: [Elecraft] KPA-500 fan noise

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Re: [Elecraft] KPA-500 fan noise

Let's end this thread for now, since the original poster has had his query answered. (And in the interest of keeping list volume under control.) 73, Eric List moderator elecraft.com On 6/2/2014 10:21 AM, Fred Townsend wrote: How would that work Bob? Actually Peltier junctions do not create

Re: [Elecraft] KPA-500 fan noise

@mailman.qth.net mailto:elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 fan noise Our Beverage Central is located in my shack. I was contemplating putting a heat exchanger on the KAP500 PA's and routing cold water from the drink fridge through it. I guess that would class as re

Re: [Elecraft] KPA-500 fan noise

On 6/2/2014 7:55 PM, Richard L Diddams, Sr. wrote: My comment is not to K6GPW, but to the continuously number of postings regarding Fan Noise. Far more than necessary, IMO. Dick, the fan speed is adjusted by the control system based on temperature of the output devices, which you can

[Elecraft] KPA-500 fan noise

I have been running some RTTY on 17M and FSK-441 on 6M meteor scatter, both of which have full period signals for 30 seconds or so. I have reduced power to 250W, but by the end of a transmissions the fan has gone to 747 short field take off mode at about 71C. Am I missing something here

Re: [Elecraft] KPA-500 fan noise

Am I missing something here or is this normal? Sounds normal for mine. I've recently had mine on 52.525 in an FM QSO. I ended up at about 250W with short transmissions. That didn't surprise me much at all, because my KPA seems to produce quite a bit of heat on six meters anyway. Hit the

Re: [Elecraft] KPA-500 fan noise

On 6/1/2014 5:59 PM, AG0N-3055 wrote: Sounds normal for mine. Yes, quite normal. The KPA500 is very well protected, while still allowing as much power output as possible. I do lots of RTTY contesting on HF, and JT65 on several bands, including 6M. Depending on the ambient temperature in the

Re: [Elecraft] KPA-500 Question

On page 23 of my KPA500 assembly manual, relating to the mounting of the rectifier board, it is clear that thermal insulators must isolate the rectifiers from the chassis, and also, that insulating shoulder washers must be installed in the four places that you mention as your concern. The next

[Elecraft] KPA-500 Question

I'm assembling a KPA-500 that I received today and I'm at the step where I mount the Rectifier bd to the Z-bracket. It looks like the 4 holes for mounting the rectifiers should be threaded for 4-40 screws but mine has about 1/8 holes. There is no mention of using a screw and nut to mount them

Re: [Elecraft] KPA-500 Question

Gary, Try to put a 4-40 screw into the holes. If it goes through, it is a 1/8 inch hole (clearance for 4-40 screws), but if it must be threaded in, all is well. A threaded hole for 4-40 will look almost like a 1/8 inch hole. Yes, the holes should be threaded for 4-40. 73, Don W3FPR On

Re: [Elecraft] KPA-500 Combiner

PM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA-500 Combiner Since a KPA-1000 or KPA-1500 have not come to fruition..how about making a Elecraft KPA-500 Combiner for stacking either two or three KPA 500's? Sell more KPA500's as required to go with the RF Combiner

[Elecraft] KPA-500 Combiner

The 9J2T group is using a combiner as we speak to combine the output of two KPA500's: http://www.i2ysb.com/idt/index.php?option=com_contentview=articleid=141Itemid=334 John Harper http://www.ae5x.com/blog __ Elecraft mailing list

Re: [Elecraft] KPA-500 Combiner

AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 Combiner Looking at specs show SWR 2:1 and 160-10M. Could live with not having 6M but the 2:1 SWR spec may be unacceptable. 73 de Brian/K3KO On 3/3/2014 06:18, Dr. William J. Schmidt, II wrote: Done. You can buy them here: http

Re: [Elecraft] KPA-500 Combiner

: [Elecraft] KPA-500 Combiner Looking at specs show SWR 2:1 and 160-10M. Could live with not having 6M but the 2:1 SWR spec may be unacceptable. 73 de Brian/K3KO On 3/3/2014 06:18, Dr. William J. Schmidt, II wrote: Done. You can buy them here: http://www.communication-concepts.com/index.php

Re: [Elecraft] KPA-500 Combiner

...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of alsopb Sent: Monday, March 3, 2014 7:54 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-500 Combiner Looking at specs show SWR 2:1 and 160-10M. Could live with not having 6M but the 2:1 SWR spec may be unacceptable

[Elecraft] KPA-500 Combiner

Since a KPA-1000 or KPA-1500 have not come to fruition..how about making a Elecraft KPA-500 Combiner for stacking either two or three KPA 500's? Sell more KPA500's as required to go with the RF Combiner __ Elecraft mailing list Home

Re: [Elecraft] KPA-500 Combiner

...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Larry - K1UO Sent: Sunday, March 02, 2014 8:04 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA-500 Combiner Since a KPA-1000 or KPA-1500 have not come to fruition..how about making a Elecraft KPA-500 Combiner for stacking

Re: [Elecraft] KPA-500 Combiner

Acom has a splitter/combiner for 3 of their 2000A amps. http://www.acom-bg.com/amplifiers.html Click the tab for 3X2000A On 03/03/2014 05:04, Larry - K1UO wrote: Since a KPA-1000 or KPA-1500 have not come to fruition..how about making a Elecraft KPA-500 Combiner for stacking either two

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