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Re: Which power output to be used with FT8 ?

 

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Hi Bruno,

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I checked 2 different X5105 manuals and found the following:

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  1. No mention of FT8 mode usage.
  2. Only reduced power on AM mode (see below).

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When using CW mode at a high duty cycle at full 5W power, I notice the rig gets warm on top. When using FT8 mode at full power you may want to notice how warm the rig gets. It¡¯s only an indicator that you may be stressing the final amp.

I believe the rig also has a thermal shutdown circuit although I could not find a mention in the manuals, so it may actually turn off if you exceed the output duty cycle.

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Best regards, Lou

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Sent from for Windows

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From: Bruno
Sent: Thursday, September 28, 2023 6:31 PM
To: [email protected]
Subject: [X5105-Users] Which power output to be used with FT8 ?

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Hello
I started to use X5105? in FT8 and? I am very happy .? Everything is working fine.? But now a doubt came in my mind.
It's ok to use full power? of? X5105? (5 Watts) ? Or i should have to use a lower power not to damage the TX ?
The doubt I have came into my mind because on? major TRX like Yaesu or ICOM there are many warning that says for example, not to use more than half of max? power in order not to damage the TX finals due to heavy duty imposed by FT8.
Is this true (heavy duty cycle)? also for X5105 running at max power 5 watts? ? Should I have to use? 3 watts for example to be more safe ?
Thank you for any advice
Bruno

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