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All of a sudden I no longer have any power out in OPR Mode.

Example:? SWR is near flat; using 20 watts out from my Yaesu FTdx101MP the LA1K, in STBY mode, shows 20 watts out and so does the HF-Auto; all as it should.? Now switch the LA1K to OPR mode and it switches to Tx as usual, but now it shows no power out at all, and the HF-Autos power out drops to 9 watts. Weird! All bands and modes behave the same way.

Any ideas?

Thanks,

Steven, N7NF

Have you tried feeding the LA-1K with your Icom-7610 to see if that would anything, Steven?

Update to this post:

Steven, I tried duplicating the observed behavior of your LA-1K/FTDX101MP using my LA-1K/FT-857D setup, since I don't use my FTDX101D with the LA-1K, as follows:

1.? Set FT-857D to 20W (FM mode)
2.? Set LA-1K (125VAC-ish) to STBY
3.? Key up FT-857D to obtain best possible VSWR at 21.290.00 MHz
4.? In step 3. (above) LA-1K and MFJ-998 both read 20W
5.? Change FT-857D from FM to USB and LA-1K from STBY to OPR
6.? LA-1K observed power output = 400W on peak, during QSO with Teddy VP2ETE
7.? Now, going from step 4. (above) to step 8. (below); skipping steps 5. and 6. (above)
8.? Removed "PTT" connection from back of the LA-1K and changed LA-1K from STBY to OPR
9.? Key up FT-857D and observed indicated power output of the MFJ-998 and the LA-1K
10.? In step 9. (above) the MFJ-998 read approximately 15W
11.? In step 9. (above) and the LA-1K showed a red horizontal deflection of roughly 1mm on the 1400W scale

Hope this helps to give you another point of reference.

73
Ray
KJ5MI

On Tue, Oct 3, 2023 at 01:18 PM, <vacawaysteve@...> wrote:

Now switch the LA1K to OPR mode and it switches to Tx as usual, but now it shows no power out at all, and the HF-Autos power out drops to 9 watts. Weird! All bands and modes behave the same way.

Steven,

Hopefully your LA-1K "no power out" situation is just a direct result of some lose connections relating to its "PTT" circuitry, as I tried to illustrate yesterday in my post /g/la1k/message/1435.

Otherwise, it could be something more serious, as seen in postings /g/la1k/message/1201 and /g/la1k/message/1204 shared by our fellow LA-1K owners, involving Palstar's repair actions.

Btw after seeing that Bob NN5D had acquired a brand new Elecraft KPA1500, I took my own advice, as seen in this posting /g/la1k/message/1182, and acquired my brand new KPA1500 to pair it with the FTDX101D as seen on my QRZ page .

73
Ray
KJ5MI

Steven N7NF
Did you find the power problem?
This same issue has occurred with my Palstar LA-1K (which was working perfectly).
Bill AG5ZN

Bill, did you fifure out your issue?? My LA-1K , just dropped it's power...? failed...? ? just showing what my reciever is putting out.