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I am new owner. Using normal keying and RF sense to switch bands. If I have tribander for 10/15/20 m and multi and dipole fri 40/17/12 m. Sendings works on all bands but I cannot assign 12/17 m to to different antenna than 10/15m. I understand 10/12 m and 15/17 m share same harmonic filters, but you should be able assign different antennas for each band? is this just issue with RF detect select and I have to use a band cable? Thanks, Brian KC4KK

Is there a fuse that needs to be changed when switching from 220 V to 110V?

I have searched and searched and am looking for this. I assume this is correct wiring. I have not seen an actual pin to pin diagram only a color code to db9 pins. DB9.........................10 pin 1BCD B IN--------5 BCD B 2BCD A-----------4 BCD A 3 NOT USED 4 NOT USED 5 NOT USED 6 GND------------3 GND 7 AMP KEY IN----1 TX IN 8 BCD D----------7 BCD D 9 BCD C-----------6 BCD C THANKS

Is there a interface specification or API for the LA-1K. I would like to remote control the amplifier and am not finding a control application for Windows. Thanks, Brian KC4KK

I have my station setup for remote operation with the exception of the amp. Is there a windows program that can control the amp to replicate what I do manually, i.e., switch power on, switch from standby to operate, view swr, power, bypass , and switch from operate to standby? Thanks, Frank W4TG

Group, I am looking for some direction in trying to connect my TS-890 to the LA-1k with a band changing cable. I was told that the Ameritron als-1306 cable would work. I bought the cable, however the db-9 connector that goes to the LA-1k is female and so is the "kenwood" db-9 connector on the back of the LA-1k. The cable I bought is the DB-DB7DK, does anyone know if this is the proper cable? Thank you, Joe W3OYJ

Hello, Like new, very little time used only a few hours for testing. Anyone interested in know more please feel from to contact Pete Marsh @ Skywave Communications Consulting LLC Email: sierrahhoteldog@... TNX Pete Marsh Project Manager 907-355-4160

Thanks, Billy. I know I can do that, but I don’t like the idea of having to shoot a little RF on CW to get the LA-1K to shift bands and have the tuner follow before I can transmit on that band. I know there’s a cable out there somewhere to automatically shift bands, I had one for the FTdx-101d. Someone must have plans for one? Cheers.. Bob KK8ZZ From: <[email protected]> on behalf of "Billy Parkinson via groups.io" <billyrpark@...> Reply-To: <[email protected]> Date: Sunday, January 26, 2025 at 11:17 AM To: "[email protected]" <[email protected]> Subject: Re: [la1k] Flex to amp cable Resent-From: <billyrpark@...> Resent-Date: Sun, 26 Jan 2025 08:17:04 -0800 You really don't need a cable, the LA-1K is RF sensing and will follow band changes. Billy Parkinson KG5RQZ WRYA510 HH 11724 COR RACES 306

Trying to get my LA-1k connected to my Flex 6600. I have the FTDI cable and then null serial cable from there. It runs my STEPPIR controller just fine but not the amp. When I change the mode in the menu it says "Cable Not Detected"

I am currently considering the purchase of a LA-1k amplifier to support my Kenwood TL-921 which does not cover 6 Meter. Can anyone provide me with any experience with the LA-1K and heavy duty cycle activities such as the Fldigi modes? Bill K KC2VUT All Gave Some Some Gave All

I just developed a problem for some unknown reason. Every band every transmission when I unkey thr LA-1k will remain in transmit and kills my receive of course. SWR 1.2 and display shows TX AMP but no power is coming out. Must me sensing a marginal ground some where. Before I contact Palstar I thought I would try and see if anybody has any ideas. Placed dummy load on each coax port and does say thing. Got a OVERDRIVEN error a couple of times using a 20 watt qrp rig for the exciter. Replaced PTT key line. Dont use a ALC line. Thanks Ferrell N4FRL

Looking at a used LA1k anything specific I should be aware of ? 2019 vintage if that matters :) -- David -W7GEL

Hello all, Just got a used LA1K yesterday. Anyone got info on serial numbers? Just curious how old it is. S# 30659. Also, I noticed in the book it mentions a switch on the side of the amp for 120/240. Mine seems to be absent of this switch. I have both power cords, I used the 120 cord and the amp came on. Any info on this? Thanks Billy Parkinson KG5RQZ WRYA510 HH 11724 COR RACES 306

I was operating the CQWW SSB contest yesterday on 10M. My SWR is fine on that band, as shown my by almost 100 Q's before having a problem. Then it just went into bypass mode and when I reset it to operate, it put out perhaps 200 watts. This has happened before and Palstar replaced one of the LDMOS. My antenna is a fan dipole up in the trees and the wind was blowing, so conceivably the swr could vary over time, but the amp has high swr protection that would cut off xmit if the SWR went above 2:1, I would think. Anyone else have an LDMOS failure and what did you determine caused this problem? How did you prevent it from happening again? I'm new to solid state amps, so wonder if this is to be expected compared to old tube amps. Thanks, Frank W4TG

Anyone have a working email address for Palstar. The 2 one the website bounce back. Steve W7CM

Philip, Thank you very much for your input.. I'll give the K4D more thoughts.. just wish that Elecraft would implement analog-looking meters (like those on my FTDX101D) in their K4 transceivers. Unlike the problematic LA-1K, my KPA1500 has absolutely no issues since day-one! Hope one day soon you will add a KPA1500 to your amps collection. Oh btw, you can see both the LA-1K and KPA1500 on my QRZ page. 73 Ray KJ5MI

Hello I have a M2 KT36XA flat on the 3 bands. When I use the LA1K on CW with more than 180 watts, it trips, SWR start jumping. Using any other AMP is no problem. Any ideas? Cheers, Philip CE4PS

Dear Group: Attached should be a short pdf document with details. Version One. Others are encouraged to provide details about connecting their transceiver. Thanks for assistance provided. 73 James N8TT