Re: [Elecraft] K3 output power spikes

On Tue,3/1/2016 12:54 PM, Bill Frantz wrote: I have not noticed any RF noise on receive when I put it into "always on" mode. Hi Bill, This is quite interesting to me. I run SO2R, so I would be concerned about noise in the second radio while transmitting on the first. Do you have a way to ch

Re: [Elecraft] K3 output power spikes

FWIW, I power my barefoot K3 with batteries and a solar charger. After our club county expedition for the California QSO Party (CQP) last year, I had a new appreciation for the way low power supply voltage could make a clean transmitter dirty. To address this problem at home, I got a N8XJK Boo

Re: [Elecraft] K3 output power spikes

-- > From: "David via Elecraft" > To: elecraft@mailman.qth.net > Sent: 3/1/2016 5:40:46 AM > Subject: Re: [Elecraft] K3 output power spikes > >> My K3 s/n 4487 has exhibited similar behaviour since I built it in 2010. >> Despite calls to Elecraft Support no solu

Re: [Elecraft] K3 output power spikes

For what it's worth, I've found over the years that battery power is less innocent than you'd think when powering electronics. Especially on a tired or cheap battery with a high internal resistance - those can drop a surprising amount of voltage under load with unexpected timing, etc. even when ful

[Elecraft] K3 output power spikes

Power supply stability. Built cheep, get worse with time, insufficient heat dissipation due to endless complaints about fan noise, cut corners on components, too small wire to rig, yada, yada, ad nauseum. Power supply issues can cause rig overheating, spikes, slow power build up, unstable power out

Re: [Elecraft] K3 output power spikes

I thought that one of the features of the K3/K3s was that it was able to run, and run well, off of batteries. These power spikes makes it sound like that is not the case? Or am I missing something? Batteries start out at 12.6v and go down from there. The K3/K3s needs to run well down to some

Re: [Elecraft] K3 output power spikes

Bill, Is there any way that you can increase the power supply voltage to 13.0 volts or more during transmit? If so, that should help. Most of my experience with power control is with the K2 which starts out at lower than the requested power after a band change or a change in power level, but

Re: [Elecraft] K3 output power spikes

Not to worry, my K3S does it too :-( On Mar 1, 2016, at 8:12 AM, Bill Hammond via Elecraft wrote: > Hi John, > My power dances all over the place (my serial number is 00069). Just had a > quick QSO with the KPA500 indicating 560 watts at the beginning and then > going down to 480 at the end.

Re: [Elecraft] K3 output power spikes

ike problem. Again, thanks for posting this David. Jim - W0EB Park City, KS -- Original Message -- From: "David via Elecraft" To: elecraft@mailman.qth.net Sent: 3/1/2016 5:40:46 AM Subject: Re: [Elecraft] K3 output power spikes My K3 s/n 4487 has exhibited similar behaviour sinc

Re: [Elecraft] K3 output power spikes

Hi John, My power dances all over the place (my serial number is 00069). Just had a quick QSO with the KPA500 indicating 560 watts at the beginning and then going down to 480 at the end. That is typical. My 12 volt supply drops to 12.2 on transmit, 13.3 on receive. I have a long 12 volt cab

Re: [Elecraft] K3 output power spikes

I've noticed that the first time I TX with my KPA500 it will fault. Seems to settle down after that. May also spoke after band change. Sent from my iPhone ...nr4c. bill > On Mar 1, 2016, at 12:23 AM, Vic Rosenthal wrote: > > Hi john, > I think I've seen this myself. I would redo the power ca

Re: [Elecraft] K3 output power spikes

My K3 s/n 4487 has exhibited similar behaviour since I built it in 2010. Despite calls to Elecraft Support no solution was found despite Gary talking me through various items until a month or so ago when the spike was causing problems with my amp on 24 Mhz. It was mentioned that the K3 must see 13

Re: [Elecraft] K3 output power spikes

Hi john, I think I've seen this myself. I would redo the power calibration with the K3 utility and a good dummy load. I'm interested in hearing people's responses to your question. Vic 4X6GP > On 29 Feb 2016, at 10:24 PM, John K1JD wrote: > > Hi All, > My K3 SN #071 was purchased new November

[Elecraft] K3 output power spikes

Hi All, My K3 SN #071 was purchased new November 2007. It’s had a few mods/upgrades along the way and its firmware is current. Last Field Day 2015 at W5YA, the K3’s LPA failed after a close lightning strike. I was able to successfully repair the LPA replacing both discrete and SMD components.