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Just got my new LA-1k It has 1.07b firmware. Is this a new version?

My week old LA-1k started just booting up to a white screen. Tried plugging a cable into the Yaesu jack like suggested on here. It did nothing. Ended up dissconnecting the keying line. It boots up then. Talked to Mark at Palstar. He had me run a ground wire from the Amp to the transciever. So far it has worked. Hope it keeps working.

The fan noise when it’s idle or the fan noise when it gets warm? 73, Bernd – KB7AK

I have two old transceivers a Kenwood TS-830S and a Yaesu FT-101ZD that I want to use on tube nets. Do I need to use an amplifier keying Interface like the Ameritron ARB-704 if I want to use these radios with my la1k? Thank you. Merlin K3MEJ

I am feeling really stupid, I cannot find the latest firmware. V1.02E is the latest one mentioned on the site and non of the firmware versions listed is clickable? I hope the latest firmware may help with the noise issues of my device.

My amp was working perfectly - It is less than a year old. I had to take down my station for a window repair and I put it back together and now have no power out from it. All seems to be connected - FTdx power out to LA1k - ALC to ALC. The amp sees the FTdx - in that it shows power as 100 watts - but does not show any more. I am using the HF-Auto tuner. Any thoughts? Dan W4DSE

I have the HF-Auto and am looking to get an amplifier. Naturally the first one I am considering is the LA-1K. Palstar's web site says: "Palstar custom-designed the LA-1K to work as the perfect match for our very popular HF-AUTO autotuner.". Can anyone explain how it is the 'perfect match'? I mean, what is it about the connection/communication between the two that would make it superior to say, the HF-Auto with another amplifier (e.g. Acom 700S)? -- 73, Norm/KC1BMD

I am a proud owner of this amp for one month. I also own the HF-Auto tuner and it works slick. I am a contester and have used this amp tuner combo in a RTTY and SSB contest running 800 watts SSB and 400 watts RTTY with no problems. this past weekend I was operating the ARRL CW SS contest and only on 80 mtrs I could not keep the amp operating while trying to send the 7 seconds of report. No other band had this problem of kicking into bypass before I could transmit the entire report. SWR was reading 1.1 on the amp and 1.06 :1 on the HF-Auto. After the contest I ran tests into my dummy load to eliminate the chance it was the antenna or feed line. I do not have a lightning protector in line. same problem existed. After calling Palstar and discussing the problem Mark sent me a software upgrade. The fact that this problem only occurs on 80 mtrs and into a dummy load as well as to the antenna via the tuner was a new one for Mark. After installing the new firmware I ran the same test and found an improvement which was everything work as expected up to 500’watts now butt try to go higher and after 8!seconds of transmitting a certain signal the amp tripped into the Bypass mode. has anyone else experienced anything like this? Alan- W1BQ

Hello All After much testing and adjusting my IC-7610 I was finally able to eliminate this problem of not operating CW on 80 mtrs without the amp going in bypass mode. On the 7610 you can adjust the rise time of the dots and dashes. Mine was on the factory default of 4 ms and I turned it up to 8ms and the problem disappeared.‘I plan to work the Thanksgiving weekend CQWW CW contest on all bands and will update all on whether this adjustment really did the trick. For any of you experiencing this problem Look to see if you have an adjustment for CW rise time and try a higher setting W1BQ Alan

I have both the LA-1K and the HF-Auto. I have three (3) antennas that I would like to use. My question is, should I connect the antennas to the LA-1K and do the antenna switching at the amplifier or should I connect the antennas to the HF-Auto and switch antennas at the tuner. Thanks. Rudy, W5HRH

This might be the strangest behavior of this amp I have heard of so far. I have a 257' EF wire with a 9 to 1 UNUN (grounded). My HF-AUTO tuner shows SWR 1.08 for example. Only in SSB as soon as I begin to talk the amp trips off with the SWR. I'm watching the SWR on the tuner, its not budging but on the amp it is jumping all over until it bypasses. Driving the amp with only 10 watts causes this to happen and I have tried it with my 7610, 7300, and 991A. Now what I'm not understanding is this. This behavior occurs only when I use a 75' run of LMR 400 coax. I have even tried a different piece of 75' LMR 400 and the result is the same. If I use a 150' run of LMR 240 the amp doesn't trip at all. I have replaced all the jumpers between the components to eliminate them as the cause. Same result. I can tune this same wire for 80M and the amp works fine regardless of the coax feed. Any thoughts? -- 73, Jerry WX1FLY

Thanks for the ad. Picking up my AL1K from HRO next week.I have to wait for my electrician to bring a 240v line over to shack before going on line with it It will mate with the Auto Tuner hopefully with no problems. 73 Chris K2HVE Bayville, NJ

My LA-1K was flawless into my dummy load. It was flawless into the dummy load attached to the HF-AUTO tuner. When I connected my non-resonant dipole to the HF-AUTO and tried to operate my LA-1K, something transient kept shutting the LA-1K down. After much testing with no resolution I called Mark at Palstar and described the issue. I told him what antenna I used and he immediately asked if I use a surge protection device in the transmission line. I had two devices in line - a PolyPhaser device and an AlphaDelta device. I first removed the AlphaDelta device and there was no change in performance - still no amp operation. Upon removing the PolyPhaser the amp worked as it should, and the HF-AUTO even tuned the antenna to frequency faster than before. The surge suppression devices, when used in a higher power line with a non-resonant antenna, can create a transient SWR condition which the LA-1K can detect, thus causing a shutdown. The amp works perfectly now. And I now search for a workable lightning protection solution for my station.

I have a new LA1K and i get different opinions on whether a Amp Relay (Ameritron ARB -704) is needed to be run between the Icom 7600 and my LA1K. I didn't think so but the dealer said it just adds safety. Opinions? TIA.. de K2HVE

Just purchased LA-1K and had trouble getting it going. After a few talks with Mark, it turns out my problems were with the transceiver. It now works flawlessly. I wish to thank Mark for his patience and expertise in communicating with me. 73, Marv, W2AOC

Brand new LA1K. Current firmware. To keep it simple, we will go with the dummy load first. I will copy/paste his reports to me. If ANYONE has a clue, please let me know. He bought the LA1K at my suggestion, and things are not going well. . I did try the ANT switching to 2 to 3 and back to 1. And I did remove the band cable In STBY mode it senses the correct frequency and changes band accordingly. I am set to 20 meters CW to a dummy load. 10 watts. When I switch to OPR the amp shows the correct frequency 14040 but switches to 160 meters and then goes into bypass. I have no idea what is going on ... Then I switch to STBY and hit the key and the amp goes to 20 meters like it should. I can repeat the cycle. I am not using ALC as that has no effect on CW. . I did put a meter on my outlet and it shows 250V across the top two and 125V between either top and common. . Also swapped out the coax to the dummy load, no change in behavior. I note that in STBY the frequency is correct and stable, while in OPR the frequency is correct but flashing. On to the antennas (which work fine with an Alpha amp) I did try it with a real antenna. Seems to work fine on the big 8040 vertical ( has a line isolator but no arrestor ). When I switched to the LPDA ( with arrestor ) it worked on 12 meters briefly, then went into BYPASS SWR. First time I have actually seen the BYPASS SWR on the display. Previously it was just showing BYPASS but not the BYPASS SWR. And now ( when operating properly ) the frequency is not flashing, so maybe frequency flashing is a clue. Now I know and understand even less than I did before. Was on 40 meter CW, answered a CQ from F4DIA on 7008. Was running 800 watts to the 8040 vertical, SWR 1.3 Halfway through the QSO the amp kicks out, showing high SWR. Had to finish the QSO barefoot. Went back to dummy load. 900 watts CW 80 meters. SWR 1.0 Amp works, then goes into BYPASS with no BYPASS XXX but I don't have to reset it, just key again and it okay. Disconnected band cable ( again ) and no difference in behavior. It just keeps going into bypass ( flashing yellow BYPASS ) no BYPASS XXX just flashing BYPASS and flashing frequency when I key. ANYONE????????????????

I have a 1500 watt RF output retrofit/upgrade modification for the Palstar LA-1K and I hope its manufacturer will contact me.

Just a FYI to readers, the latest firmware revision (1.08C) has been posted on the Palstar website. Thanks "Allow the displayed frequency to show any changes for only 20 ms after the PTT is activated. Any changes in the frequency after that initial time window will not be displayed while the PTT remains activated." http://www.palstar.com/en/la1k/