locked Re: Duty cycle question

Frank Donovan

Try with on your radio and let us know how it goes...

From: "Joe WB9SBD" <nss@...>
To: main@WSJTX.groups.io
Sent: Thursday, August 13, 2020 8:32:49 PM
Subject: Re: [WSJTX] Duty cycle question

60 minutes on, 60 minutes off is then also 50% duty cycle?


The Original Rolling Ball Clock
Idle Tyme

On 8/13/2020 2:58 PM, careyfisher@... wrote:
15 seconds On, 15 seconds Off, looks like a 50% duty cycle to me.
73, Carey, WB4HXE

On Thu, Aug 13, 2020 at 3:42 PM W1EL Eric <elowell@...> wrote:

Power out = power out, regardless of bandwidth.


Best, Eric (W1EL)


From: main@WSJTX.groups.io <main@WSJTX.groups.io> On Behalf Of d_ziolkowski
Sent: Thursday, August 13, 2020 15:14
To: main@WSJTX.groups.io
Subject: [WSJTX] Duty cycle question


Hello all=

We have all been educated that due to the high duty cycle of FT8, it is wise to not run full power of you rig to avoid burning up the finals. 

My question relates to the effect of the transmitted bandwidth, which in FT8 is 50HZ, has on the actual power loading of the finals. 

Since when transmitting a 50Hz signal via a transmitter capable of about 2Khz or so, would this , in effect , very lightly load the finals, even at full power?



Carey Fisher

73, Carey, WB4HXE


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