Re: [Elecraft] FS: KPA500/KAT500 Combo

Since I moved to Gmail a long time ago, I get zero Spam. I even moved my domains there. It just works the way it should and easier than the spam filters. Mike va3mw Sent from my iPad > On Nov 9, 2018, at 8:40 PM, W0FK wrote: > > “Deal killer. > Ken ke4rg“ > > Interesting reaction to

Re: [Elecraft] KPA1500 fan on stby

I could be wrong, but I don't think the PS fan is controlled by the KPA1500 at all. The power supply itself is from a third party, and I think the fan is integral to it, and probably also the fan controller. 73, Scott K9MA On 11/9/2018 16:52, Richard Thorne wrote: As soon as the supply has a

Re: [Elecraft] K2: KPA100 fan issue + current question

Thanks Bob, Yet another variable! I just measured my dummy load at 54 ohms (cold). Maybe I should just declare victory and move on! 73, Jim KO5V -Original Message- >From: Bob McGraw K4TAX >Sent: Nov 9, 2018 8:51 PM >To: Jim KO5V , donw...@embarqmail.com, Elecraft List > >Subject:

Re: [Elecraft] OT: SPAM filtering ...

What's spam?   I never see any using Greymail as my filter and none of the senders ever know they've been filtered.   I do check the contents on a regular basis and rarely, very rarely, do I ever find a message that should have passed through.  Best of all, it is easy to use and FREE. 73

Re: [Elecraft] K2: KPA100 fan issue + current question

Not at all unusual for the currents to be different on different bands. Since most power meters are voltage sensing devices, the value of the dummy load will affect the power indication.  Thus as the R value increases the voltage across the R increases for a given power value and thus the

Re: [Elecraft] K2: KPA100 fan issue + current question

Thanks again, Don. It's good to know that the variation in current isn't a problem. I was also a bit surprised with the 12M and 20M measurements. I think I will do a complete realignment of the K2, and set up the wattmeter on the KPA when I get the LP100 back. Meanwhile, I'll try a few QSOs

[Elecraft] OT: Re: FS: KPA500/KAT500 Combo

I honestly forgot ... I also have Norton 360 that's updated daily. It's likely that much of my lack of SPAM should be credited there. 73 ! K0PP On Fri, Nov 9, 2018, 18:40 W0FK “Deal killer. > Ken ke4rg“ > > Interesting reaction to having a “grant permission” spam filter. It takes > just a

Re: [Elecraft] FS: KPA500/KAT500 Combo

“Deal killer. Ken ke4rg“ Interesting reaction to having a “grant permission” spam filter. It takes just a minute or less to verify the email you’re sending from isn’t junk. I don’t see how a small inconvenience could be a deal breaker. But to each his/her own. My isp screens out most spam,

Re: [Elecraft] FS: KPA500/KAT500 Combo

Way off topic by now, so my final post. I get the inundation by spam situation. I utilize 17 email addresses to separate personal, hobbies, lists (like this one), public facing (club contact) and one used just for bingo card registrations. The club related email gets about a thousand spam

[Elecraft] please ignore previous comment on fan speed for KPA1500

I now see that the fan speed specs changed with the new firmware.  Just not use to the new 50 deg on from 60 deg on. -- Don Minkoff NK6A __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] OT: SPAM filtering ...

I ran an ISP for 20 years or so. Server-side filtering is great. I still run my own mail server. If you use a mail client on your own machine, POPFile is awesome. It can even classify a list like this one into different mail folders based by topic and is fairly easy

Re: [Elecraft] KPA1500 new software 1.87

This is as intended. The release notes describe this. The intent is to use higher fan speeds less often by starting a bit lower. 73 de Dick, K6KR > On Nov 9, 2018, at 16:56, Don Minkoff wrote: > > I just went from my 1.62 rev to 1.87 and something changed. My fan use to > come on at 60 deg

Re: [Elecraft] KPA1500 new software 1.87

The firmware release notes seem to support what you are seeing: Changed temperatures for fan speeds: - On 160 thru 10 meters, fans increase speed at 50, 70, 80, 87, and 95 degrees, and slow at 40, 55, 75, 81, and 88 degrees. - On 6 meters the fans increase speed at 40, 50, 65, 80, and 90 degrees

Re: [Elecraft] FS: KPA500/KAT500 Combo

Deal killer. Ken ke4rg -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Ken G Kopp Sent: Friday, November 9, 2018 6:42 PM To: Mike - W5JR ; Elecraft Subject: Re: [Elecraft] FS: KPA500/KAT500 Combo Hi Mike! Rose (elecraftcov...@gmail.com) ran into one of these

[Elecraft] Thanks all around

It is not at all unusual for the Reflector to carry posts thanking and in praise of Eric, Wayne, Jack, Alan, their colleagues, and Elecraft in general. And in those I concur. I would like to offer a similar kudos to the Reflector participants as well. My recent request for advice about

[Elecraft] KPA1500 new software 1.87

I just went from my 1.62 rev to 1.87 and something changed.  My fan use to come on at 60 deg and now comes on at 50 and off at 40. I need to go back and try and reload the older version.  I don't think this is correct. Anyone else run across this? -- Don Minkoff NK6A

Re: [Elecraft] FS: KPA500/KAT500 Combo

A good Bayesian spam filter is quite effective and is implemented in several email clients. Oh yes, you have to initially identify the Spam, but the filter learns what is spam and what is not and automatically directs it to the Junk folder. The Embarq (CenturyLink) "reject everything" is

[Elecraft] OT: SPAM filtering ...

Between Rose and me we have four email addresses, yet SPAM is rare. Can't help but credit our provider, CenturyLink. 73 ! K0PP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] K2: KPA100 fan issue + current question

Jim, That is normal.  The Transmit RF Gain varies from band to band, and that will cause the current draw to vary.  I am surprised that 12M is so low, it is normally on a par with 10 meters. Part of the RF Gain variation is in the base K2 and some more of it is in the KPA100. Remember

Re: [Elecraft] FS: KPA500/KAT500 Combo

That is a pretty common anti-spam filter. I don’t mind it. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Nov 9, 2018, at 3:18 PM, Mike - W5JR wrote: > > Wow, I was interested, but not now that I have to “register” and get approval > from the poster for

Re: [Elecraft] Say it ain’t so... KPA1500 died

Sounds like 1 of the 2 output stages died. Not unheard of. - Paul At 03:51 PM 11/9/2018, W1PEF wrote: Sorry to report but my 6 month old KPA1500 died (near death to be factual). My amp is #172 and has been in service since May 2018. It has been super and haven’t had any problems until

Re: [Elecraft] Say it ain’t so... KPA1500 died

Hi Paul - we'll make sure to get this resolved for you quickly! 73, Eric /elecraft.com/ On 11/9/2018 3:51 PM, W1PEF wrote: Sorry to report but my 6 month old KPA1500 died (near death to be factual). My amp is #172 and has been in service since May 2018. It has been super and haven’t had any

Re: [Elecraft] KPA1500 fan on stby

The PS fans run at a constant slow speed to primarily cool the main 50V switching PS. Interestingly, even at idle, a switcher is a little less efficient than at full load, so it still needs some cooling air flow. We design all of our product cooling on a very conservative basis. There is a

Re: [Elecraft] FS: KPA500/KAT500 Combo

Geez guys, I have a spam filter. Sorry it’s an inconvenience to you, but I was getting 300 a day snd had to do something As running on the major sites as well - St. Louis, MO "The difference between stupidity and genius is that genius has its limits." Albert Einstein -- Sent from:

[Elecraft] Say it ain’t so... KPA1500 died

Sorry to report but my 6 month old KPA1500 died (near death to be factual). My amp is #172 and has been in service since May 2018. It has been super and haven’t had any problems until yesterday. Was on a 160m net, checked in without issue. When my turn happen I keyed the mic and immediately got

Re: [Elecraft] FS: KPA500/KAT500 Combo

Hi Mike! Rose (elecraftcov...@gmail.com) ran into one of these guys ... maybe the same one ... the sale simply not worth the effort. 73 K0PP On Fri, Nov 9, 2018, 16:19 Mike - W5JR Wow, I was interested, but not now that I have to “register” and get > approval from the poster for him to

Re: [Elecraft] FS: KPA500/KAT500 Combo

Wow, I was interested, but not now that I have to “register” and get approval from the poster for him to receive my emails to his advertisement. Oh, well. tnx Mike / W5JR Alpharetta GA > On Nov 9, 2018, at 5:50 PM, W0FK wrote: > > Selling a KPA500/KAT500 Combo. With optional KPAK3AUX and

Re: [Elecraft] K2: KPA100 fan issue + current question

Don and Bob, The K2 and amp are both powered from the amp's supply. I used a known good DVM to measure the voltage across R7, and it agrees with old Beckman. I now think my old kit-built Ten Tec power meter may be badly out of calibration. I have a dead LP-100 that is on its way back to Larry

Re: [Elecraft] KPA1500 fan on stby

As soon as the supply has a load on it a good bit of the noise is reduced. Maybe there's a way to put a small constant load on the supply? Rich - N5ZC On 11/8/2018 6:59 AM, eric norris via Elecraft wrote: Why is the KPA1500 PS fan making so much noise when the amp is in STBY and just the ATU

[Elecraft] FS: KPA500/KAT500 Combo

Selling a KPA500/KAT500 Combo. With optional KPAK3AUX and cables to interface both units to a K3/K3S. Please email me off the list for details. Lou, W0FK lladerman AT earthlink DOT net - St. Louis, MO "The difference between stupidity and genius is that genius has its limits." Albert

Re: [Elecraft] KPA1500 fan on stby

Eric, I totally agree that the KPA 1500 PS fan noise is mildly irritating to the point that I moved mine to the other side of the wall--An option not available to all. It sure seems like it could run much less than it does. I have yet to feel any heat coming from the PS unit even after

Re: [Elecraft] K2: KPA100 fan issue + current question

Efficiency is an interesting point in a linear amplifier. As the linear is “efficiency” modulated when it is driven to full power output it does in fact approach the 70% efficiency level of a class C amplifier. Not quite but it closes in. The 30% to 50% rating a linear amplifier normally

Re: [Elecraft] K2: KPA100 fan issue + current question

Jim, That 11 amps would sound more reasonable to me if you can say that the base K2 is being powered separately, but I would expect something closer to 50% efficiency rather than 66%. 73, Don W3FPR On 11/9/2018 12:42 PM, Jim KO5V wrote: Thanks Bob, That makes me feel a bit better. I'm

Re: [Elecraft] K2: KPA100 fan issue + current question

Thanks Bob, That makes me feel a bit better. I'm still going to remeasure it with a newer meter and see if the measurements check. 73, Jim KO5V -Original Message- >From: Bob McGraw K4TAX >Sent: Nov 9, 2018 10:29 AM >To: Jim KO5V >Cc: Elecraft List >Subject: Re: [Elecraft] K2:

Re: [Elecraft] K2: KPA100 fan issue + current question

At 13.8 volts, 11amps is about 152 watts input. 100/152 = .658 * 100 for about 66% efficiency. All in all , looks about right to me. AKA - I wouldn't be concerned. Bob, K4TAX Sent from my iPhone > On Nov 9, 2018, at 10:46 AM, Jim KO5V wrote: > > Well, after checking that all of the

Re: [Elecraft] K2: KPA100 fan issue + current question

Don, Yes, I set the bias as described, and at that setting, R6 is rotated about 1/3 clockwise from fully CCW (I saw a reference to that reference in the archives). My guess is that my 35 year-old Beckman meter may be having trouble measuring small voltages, so I'll try another meter, and I'll

Re: [Elecraft] K2: KPA100 fan issue + current question

Jim, I would expect that the current at 100 watts would be closer to 17 or 18 amps. Has the bias been set correctly for a 400mA rise in PA current with no RF input? That bias setting will alter the operating class of the amplifier and it must be correct to be linear. 73, Don W3FPR On

[Elecraft] K2: KPA100 fan issue + current question

Well, after checking that all of the components in the fan circuit were correct, I decided to follow Don's usual advice about checking my soldering, so I re-flowed all of their joints. None looked bad, but now the fan works as it should, so... I'm still curious about my 11A @ 100W measurement.

Re: [Elecraft] KPA1500 not amplifying

Bob, That power ramp up is often caused by not driving the K3 with sufficient audio. Your audio level should be adjusted to produce 4 bars solid on the K3 ALC meter with the 5th bar flashing. I have an article on my website www.w3fpr.com explaining the audio settings. 73, Don W3FPR On

Re: [Elecraft] KPA1500 not amplifying

Eric et al - I performed the wattmeter calibration from page 52 of the user manual, and then did the 5 and 50 watt TX gain calibration using the K3(s) Utility. I notice that during the first transmission of AFSK RTTY into a Palstar dummy load, the KPA1500 output power grows to the desired