[Elecraft] Power spike early K3

Hi, We have an early serial K3 which has got an issue with power spikes. I have done a TX gain calibration without it making a difference. The spike happens mainly when you have changed to a new band and during the first transmission. After that the spike is a lot smaller and not much of an issue.

Re: [Elecraft] Power spike early K3

Hi Mike, I saw that you had posted a similar question in January 2023 and had some suggestions including running the TX Gain calibration, which you did, but apparently without effect on the spiking. There have been numerous reports of TX power spikes on first dit or first voice sound. Some found

[Elecraft] KPA3 Rev B not output

I posted here last fall when one of our K3 radios stopped putting put any power during the last few hours of the CQ WW CW contest. For many reasons I am finally getting back to looking at this failed radio. I swapped in a known working KPA3 Rev C module and the radio works as expected now on

[Elecraft] K-Line For Sale

First licensed at 14, I'll be 80 in a few months. After my wife's passing, I've lost interest in several things, ham radio being one. I have a K-Line, but it has been turned on less than 10 hours in the past 4-5 years. So, to save my children some hassle after my passing, it's

[Elecraft] looking for KX3

Subject says it. lead times on KX3 are long and I am looking for one to be in my hands sooner than that. Jim N1NK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.h

Re: [Elecraft] Power spike early K3

I had a similar problem and traced it to voltage sag under load at the K3. The power supply was good under load but there was too much loss in the stock cable which was wired directly to the PS. I replaced it with a heavier, shorter cable. I found that I had to run the TX gain calibration twice

Re: [Elecraft] KPA1500 HIGH DISS and GAIN LOW

hello I am in the station right now. Connected a Dummy Load to ANT1 KPA1500 and tested each band, driving with 25 watts 160 mts: on KPA1500 display: FAULT: PWR DISS 2973 watts - on K3 display: FAULT 11 80 mts: on KPA1500 display: FAULT: PWR DISS 2776 watts - on K3 display: FAULT 11 60 mts: on KPA

Re: [Elecraft] Power spike early K3

I had the same problem with the K3/KPA1500 combination. I recalibrated the K3. Then I made sure I don't run the K3 at exactly 5W or 50W. The problem has not reappeared.N2TK, Tony -Original Message- From: Mikael Larsmark To: elecraft@mailman.qth.net Sent: Sat, May 20, 2023 3:45 am Subje

[Elecraft] Elecraft CW Net Announcement

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