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Hair rising story

 

Today I was racing the bands so much during a POTA activation that I noticed I CQ'd two times 5 W in FT8?on 6 m using the wrong output (antenna was in the rear but the menu was selected FRONT). After I noticed, I corrected and the radio operated normally on both outputs (apparently).

How much did I ruin the radio??

Daniel.
 

That’s hard to tell. Probably nothing damaged if you are still able to transmit on all bands as expected. I know the concern. But if it’s working normally, it’s not like you’ve partially hurt something. If you ruined the finals you’d be putting out nothing or milli watts. Have you made any SSB contacts or listened to yourself on kiwi sdr or web sdr? Do you have a power meter and dummy load to test output? Hopefully someone else will have a better answer or suggestion.

On Sun, Jan 19, 2025 at 10:46?AM Daniel Vianna via <py2tdb=[email protected]> wrote:
Today I was racing the bands so much during a POTA activation that I noticed I CQ'd two times 5 W in FT8?on 6 m using the wrong output (antenna was in the rear but the menu was selected FRONT). After I noticed, I corrected and the radio operated normally on both outputs (apparently).

How much did I ruin the radio??

Daniel.
 

If it is still putting out the expected power, it's OK.


On Sun, Jan 19, 2025, 9:46 AM Daniel Vianna via <py2tdb=[email protected]> wrote:
Today I was racing the bands so much during a POTA activation that I noticed I CQ'd two times 5 W in FT8?on 6 m using the wrong output (antenna was in the rear but the menu was selected FRONT). After I noticed, I corrected and the radio operated normally on both outputs (apparently).

How much did I ruin the radio??

Daniel.
 

The 817nd is pretty robust,? I've had a 70cms 5w usb qso over 10 miles without a connected antenna. Other than a weaker than normal signal no damage done. You should be fine.
Andy
 

I had a poorly tuned 2 meter dipole, purchased online, antenna that made my FT817ND display flash a warning message of high SWR(???) during RTTY transmissions, and the finals never failed.? (maybe once, transmitted full power without an antenna, maybe). ? Later tuned that antenna with my NanoVNA.? The ND seems to be pretty rugged to abuse.? Electronics, by design, can take short duration abuse, polarity swaps in SOME instances on 5VDC devices.? I say enjoy that radio until it fails.

On Sunday, January 19, 2025 at 04:04:54 PM EST, M0RON via groups.io <eustace.andy@...> wrote:


The 817nd is pretty robust,? I've had a 70cms 5w usb qso over 10 miles without a connected antenna. Other than a weaker than normal signal no damage done. You should be fine.
Andy
 
Edited

I think the FT817 screen will show a high SWR warning and foldback the power output, I’ve been in the same boat before and no harm done.
73 Paul 2E0YOB
 

I allways?put a 50ohm?dummy load on the antenna?output that is not in use.
Having to replace the output pa transistors?in not fun and expensive.
I hope this solves some of your concern for the pa on the FT-817.
73 Barry ZL2TSP
 

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I like the way you think, Barry!

Though real estate within the FT-817 case is at a premium, including an automatically switched load for the unused antenna port would have been a superb design addition to the rig.

Then again, I suppose there's only so much idiot proofing a manufacturer is going to provide.

72/73, Jeff WN1MB



On 1/20/25 15:25, Barry Salt via groups.io wrote:

I allways?put a 50ohm?dummy load on the antenna?output that is not in use.
Having to replace the output pa transistors?in not fun and expensive.
I hope this solves some of your concern for the pa on the FT-817.
73 Barry ZL2TSP
 

I have managed to work stations in 6 m FT8 (FRONT), 2 m and 70 cm FM (FRONT) and 10 m FT8 (REAR) after.

As you've said: probably nothing damaged. Phew!


Em dom., 19 de jan. de 2025, 15:02, Mike Davis via <maddmd818=[email protected]> escreveu:

That’s hard to tell. Probably nothing damaged if you are still able to transmit on all bands as expected. I know the concern. But if it’s working normally, it’s not like you’ve partially hurt something. If you ruined the finals you’d be putting out nothing or milli watts. Have you made any SSB contacts or listened to yourself on kiwi sdr or web sdr? Do you have a power meter and dummy load to test output? Hopefully someone else will have a better answer or suggestion.

On Sun, Jan 19, 2025 at 10:46?AM Daniel Vianna via <py2tdb=[email protected]> wrote:
Today I was racing the bands so much during a POTA activation that I noticed I CQ'd two times 5 W in FT8?on 6 m using the wrong output (antenna was in the rear but the menu was selected FRONT). After I noticed, I corrected and the radio operated normally on both outputs (apparently).

How much did I ruin the radio??

Daniel.
 

Great advice!


Em seg., 20 de jan. de 2025, 17:42, Jeff WN1MB via <jwbauer=[email protected]> escreveu:

I like the way you think, Barry!

Though real estate within the FT-817 case is at a premium, including an automatically switched load for the unused antenna port would have been a superb design addition to the rig.

Then again, I suppose there's only so much idiot proofing a manufacturer is going to provide.

72/73, Jeff WN1MB



On 1/20/25 15:25, Barry Salt via wrote:
I allways?put a 50ohm?dummy load on the antenna?output that is not in use.
Having to replace the output pa transistors?in not fun and expensive.
I hope this solves some of your concern for the pa on the FT-817.
73 Barry ZL2TSP

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