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 swr to high when engine is running

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teapot
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Call Sign : 26-CT-4484
Posts : 92
Times Thanked : 3
Join date : 2021-10-17
QTH or Location : Torquay
Equipment Used : cobra 148 glt dx starlker9 fdx, icom 706 mk1

swr to high when engine is running Empty
PostSubject: swr to high when engine is running   swr to high when engine is running Icon_minitimeSun Apr 17, 2022 8:52 pm

can anyone one please tell me why my radio tells me my swr is high when the engine is running i have a SWR 1.1 on AM, FM and SSB but when i start the engine it wont let me use SSB but will AM and FM my radio is a 6900.
thanks
Dave 73s
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Alan Pilot
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Alan Pilot


Call Sign : 163-CT-220...MW7TTA
Posts : 2518
Times Thanked : 69
Join date : 2019-11-19
QTH or Location : Anglesey North Wales
Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+.
Age : 150

swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeMon Apr 18, 2022 8:02 am

Personally i would use an external swr meter as i don't trust the built in ones.
With the engine running you will get a higher voltage that could upset the built in swr meter.
You might even find the one in the radio is telling porkies.

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swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeTue Apr 19, 2022 8:09 pm

Alan Pilot wrote:
Personally i would use an external swr meter as i don't trust the built in ones.
With the engine running you will get a higher voltage that could upset the built in swr meter.
You might even find the one in the radio is telling porkies.
I get High DC warning flash up on my 6900n while the engine is running.So I just use it with the engine off while static mobile and every 60 minutes or so I switch it off and run the engine for a while.No AA on the T5..lol
Cheers Tom.
26CT429
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teapot
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Call Sign : 26-CT-4484
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Join date : 2021-10-17
QTH or Location : Torquay
Equipment Used : cobra 148 glt dx starlker9 fdx, icom 706 mk1

swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeTue Apr 19, 2022 8:15 pm

Thank you for your comment what I have done i just turn of the function so I can use it with the engine running because I know my SWR is very low.

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swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeWed Apr 20, 2022 7:54 am

teapot wrote:
Thank you for your comment what I have done i just turn of the function so I can use it with the engine running because I know my SWR is very low.
Hi teapot,Can I ask what function have you switched off on your radio..
Cheers Tom
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Victor
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Victor


Call Sign : 26-CT-3228 / M7VIC
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swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeWed Apr 20, 2022 10:13 am

Sorry to jump in here....(just trying to help. Smile )


It's the "tSr" setting on the function menu setup Tom.

Just in case, page 17 of the manual on the following link :-

http://www.cbradio.nl/crt/Manual_CRT_6900_ENG.pdf


All the best,
Victor
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teapot
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Call Sign : 26-CT-4484
Posts : 92
Times Thanked : 3
Join date : 2021-10-17
QTH or Location : Torquay
Equipment Used : cobra 148 glt dx starlker9 fdx, icom 706 mk1

swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeWed Apr 20, 2022 10:18 am

Thank you Victor I was just about to tell him that as I have just read his reply.
Teapot

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Victor
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swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeWed Apr 20, 2022 10:24 am

No worries there Dave, we're all a helpful bunch here at Charlie Tango. Smile

Your solution of turning the SWR protect function off when you know the SWR is good is a great idea.


All the best,
Victor
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teapot
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Call Sign : 26-CT-4484
Posts : 92
Times Thanked : 3
Join date : 2021-10-17
QTH or Location : Torquay
Equipment Used : cobra 148 glt dx starlker9 fdx, icom 706 mk1

swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeWed Apr 20, 2022 10:28 am

Thank you Victor

Victor likes this post

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Alan Pilot
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Major contributor
Alan Pilot


Call Sign : 163-CT-220...MW7TTA
Posts : 2518
Times Thanked : 69
Join date : 2019-11-19
QTH or Location : Anglesey North Wales
Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+.
Age : 150

swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeWed Apr 20, 2022 10:38 am

Anybody.
Make sure your SWR is good and if you can check it with an external meter.
Just me better safe than sorry with blown output's.

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swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeWed Apr 20, 2022 1:08 pm

Victor wrote:
Sorry to jump in here....(just trying to help. Smile )


It's the "tSr" setting on the function menu setup Tom.

Just in case, page 17 of the manual on the following link :-

http://www.cbradio.nl/crt/Manual_CRT_6900_ENG.pdf


All the best,
Victor
Thank you Victor,hope your good mate.
Tom
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Victor
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Victor


Call Sign : 26-CT-3228 / M7VIC
Posts : 5803
Times Thanked : 352
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitimeWed Apr 20, 2022 2:45 pm

No worries Tom. We're all good here thanks mate, I hope you and yours are all well too.

73s
Victor
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swr to high when engine is running Empty
PostSubject: Re: swr to high when engine is running   swr to high when engine is running Icon_minitime

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