I whacked my 817ND when the antenna tuner didn't kick in right on HF.? Had to send it back to a Yaesu repair station to the tune of $200.00 plus shipping.? That was a lonnnnnngggg time ago too!? Probably a lot more $$$$$ now.? I was stupid and ran mine through an RM Italy amp when it was apparent I couldn't get out. I missed the tuning protocol on the antenna tuner I had inline one time and whacked the output transistors on the 817ND!

I'm afraid it's going to cost you some $$$$$.? I researched doing it myself and it was too complex.? Sent it back to a Yaesu service center and they replaced the HF output transistors that were dorked and re-aligned the rig.

I suggest you do the same if you want to use it on HF.

Was worth every penny as I was able to run it (and still can) without issue.? I had custom filters installed from an outside provider just after I got it (now out of business) and that darned thing was so quiet as far as noise was concerned.? It almost cost as much to get the conversion done as I paid for the unit originally but well worth it to me back then.

I need to throw a long wire inverted L into the trees again.? I have a 10 foot copper coated ground stake to feed against.? The horizontal of the inverted L was facing southwest but I had a blast talking to operators in Tahiti when conditions were right putting out 300 watts through the amp with the 817ND.

I usually run it VHF and UHF now with a screw in antenna without an amp on 5 watts so that is a harmless way to run it.

I'm afraid if you want to get it fixed, you'll either have to spend the money or be satisfied with running VHF/UHF only.

I bought my ND a long time ago and dorked it shortly thereafter.? Spent the money to get it fixed as I researched doing it myself but it was too much of a hassle.? Wished I had better news for you but

"That's the way it is!"

I bought an FT-851D when I didn't want to mess with an amp and run 100 watts.? I could plug it into the RM Italy amp and get 300 watts (supposedly) out but I dialed down the output on the FT-851D to 5 watts to do

that trick.

Kurt KC9LDH

P.S.? Wished I had better news for you but if you want to get the unit back up on HF, you'll have to spend some money.? Back in the day, I researched doing it myself and it was too involved.